Articles de revues : « Sanka River Basin »

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Fermino Campioli, Pâmela, et Celso Voos Vieira. « Avaliação do Risco a Inundação na Bacia Hidrográfica do Rio Cubatão do Norte, Joinville/SC ». Revista Brasileira de Geografia Física 12, n^o 1 (2019) : 124–38. http://dx.doi.org/10.26848/rbgf.v12.1.p124-138.

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Vieira, Thiago B., et Francisco L. Tejerina-Garro. « Assessment of fish assemblages in streams of different orders in the Upper Paraná River basin, Central Brazil ». Iheringia. Série Zoologia 104, n^o 2 (juin 2014) : 175–83. http://dx.doi.org/10.1590/1678-476620141042175183.

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The aim of this study was to test whether the richness observed and the biomass per trophic group of fish assemblages vary depending on the order (1st and 2nd) of the streams located in three different basins of the Upper Paraná River Basin, Central Brazil. Samples were collected between April and September, 2009, in 27 streams of the Meia Ponte, Piracanjuba and Santa Maria River basins. A total of 4,879 specimens were collected distributed in 59 species and 19 families. The statistical analyses carried out indicate that the observed richness and biomass of omnivore fish were influenced by the interaction of two factors: stream order and basin. The 2nd order streams located in the Santa Maria basin presented significant differences in the observed richness and omnivore biomass when compared to i) 1st order streams in the same basin (only richness) or in the Piracanjuba and Meia Ponte basin; ii) 2nd order streams in the Piracanjuba (only omnivore biomass) and Meia Ponte Rivers basins. Results are discussed considering the influence of geomorphic processes on fish assemblages and food availability.

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Ternus, Raquel Zeni, Gilza Maria de Souza-Franco, Maria Elena Krombauer Anselmini, Douglas João Carlos Mocellin et Jacir Dal Magro. « Influence of urbanisation on water quality in the basin of the upper Uruguay River in western Santa Catarina, Brazil ». Acta Limnologica Brasiliensia 23, n^o 2 (juin 2011) : 189–99. http://dx.doi.org/10.1590/s2179-975x2011000200009.

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AIM: The main objective of the study was to evaluate the limnological characteristics of rivers flowing through urban and rural areas in the upper Uruguay River basin in western Santa Catarina (SC), Brazil. METHODS: Sampling sites in the tributaries were selected along the longitudinal gradient and the different use of the soil in adjacent areas. Samples were collected bimonthly from March 2005 to August 2006. The following were analysed: depth, pH, electrical conductivity, dissolved oxygen concentration (DO), water temperature, chemical oxygen demand (COD), total alkalinity, ammonia, nitrite, nitrate and phosphorus were analysed. RESULTS: In most of the rivers analysed, we found a continuum from the spring to the river mouth that was characterised by a gradual increase in electrical conductivity, COD, phosphorus, alkalinity, nitrite and nitrate. However, an alteration from this pattern was found in rivers passing through urban areas. This deviation was due to high organic matter input poured into the rivers from these areas. CONCLUSIONS: Degraded riparian forest was observed along most of the bodies of water, which facilitates the entry of pollutants. Although the studied area suffers from intense farming activity (agriculture and livestock) and has the highest concentration of swine livestock in the country, the rivers that were most altered from their natural state were those that were influenced by sewage and industrial effluents from urban development.

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Santacruz De León, Germán. « Variación Crono espacial de los Caudales Ecológicos en la Cuenca del Río Valles, México ». Aqua-LAC 2, n^o 1 (31 mars 2010) : 26–36. http://dx.doi.org/10.29104/phi-aqualac/2010-v2-1-03.

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Los caudales ecológicos se definen como el régimen fluvial en un cuerpo de agua que permite mantener el funcionamiento del ecosistema acuático en condiciones naturales. La legislación ambiental en México – Ley de Aguas Nacionales (LAN), Ley General del Equilibrio Ecológico y Protección Ambiental (LGEEPA) –, en concordancia con la legislación de países europeos, establece la necesidad de definir caudales en las corrientes superficiales perennes que permitan, ante los diversos usos que se le da al agua que circula por ellas, la existencia o permanencia de la fauna acuática. En el río Valles, localizado en el estado de San Luis Potosí, México, se ha presentado en diferentes años mortandad de peces en la época de estiaje, ello como consecuencia del incremento en las extracciones de agua para uso doméstico y agroindustrial, así como por las descargas de aguas residuales al río. Debido a lo anterior los usuarios, representados en el Comité de Cuenca del río Valles, han establecido, en dos zonas, un nivel de referencia que ha disminuido la mortandad de peces; sin embargo, aún se tienen efectos nocivos en la fauna acuática. En tal sentido, los objetivos de esta investigación fueron estimar los caudales ecológicos en el río Valles con el método Tennant y analizar la variación espacio-temporal de los mismos. Se fijaron dos puntos (Micos y Santa Rosa) y dos períodos (1960-1975 y 1976-2000) de análisis; los resultados muestran que los caudales medios anuales están disminuyendo, generando un decremento en los caudales ecológicos del 10 %. De acuerdo a los resultados se pueden inferir condiciones ecológicas adversas de marzo a mayo en el tramo Micos-Santa Rosa-El Pujal.

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Rojas-Granada, Maria Alejandra, Arnol Cardozo-Rueda, Carlos Alberto Agudelo Henao, Juliana Guzmán et Paula Andrea Sucerquia Rendon. « Pleistocene plants from Zarzal Formation, middle valley of the Cauca River Basin, Colombia ». Revista Brasileira de Paleontologia 24, n^o 2 (28 août 2021) : 104–19. http://dx.doi.org/10.4072/rbp.2021.2.03.

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We report macro and meso palaeobotanical records from the Zarzal Formation, in the Cauca River Depression, and the Quindío-Risaralda Basin between the Western and the Central Cordilleras of Colombia. The fossils correspond to leaves and seeds obtained from layers of mudstones, diatomites, and tuffaceous sandstones deposited in the inter-Andean valleys of Cauca and La Vieja rivers, separated by the Serranía Santa Bárbara ridge between the Valle del Cauca and Quindío departments. The sediments of the Pleistocene Zarzal Formation were deposited in a fluvial-lacustrine environment, with volcanic influence originated in the Central Cordillera to the east of the depositional area. The study here presented allowed the identification of thirteen morphotypes of leaf impressions grouped in six Angiosperm families: Poaceae?/Cyperaceae? and Araceae of the Monocots group, Melastomataceae, Fabaceae and Lauraceae belonging to the Eudicots group and one family of Lycopsida: Thelypteridaceae. On the other hand, very well-preserved silicified micro-seeds were grouped in eight morphotypes, belonging to the botanical groups Cyperaceae and Asteraceae. The fossils found allowed us to identify two types of plant associations that exhibit paleofloristic richness. In the Cauca River Basin, an autochthonous to parautocthonous plant association could correspond to a sub-Andean gallery forest, whilst in the La Vieja River Basin a parautocthonous plant association indicates a swamped floodplain. Keywords: paleoflora, leaves, seeds, Cauca River, La Vieja River, lacustrine deposit.

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Williams, T. C., et P. E. Dee. « A citizen's approach to integrated river basin management ». Water Science and Technology 32, n^o 5-6 (1 septembre 1995) : 169–74. http://dx.doi.org/10.2166/wst.1995.0593.

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This paper describes the success of an ad hoc citizen group in developing an integrated water resource plan for the Santa Fe River in the high desert of New Mexico. Much of the time the Santa Fe River, which runs through the centre of town, is dry because of impoundments for water supply. Water management responsibilities in the area are divided between eight government agencies. Each agency has its own narrowly perceived agenda for managing that aspect for which it is responsible. It was apparent that a holistic approach to water management was sorely needed. An ad hoc citizen committee was formed without government support (either technical or financial), to attempt to bring some rational planning to the use of existing water resources in the growing community.

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Temimović, Emir. « Proračun godišnje količine padalina u poriječju Sane primjenom Thiessenovih poligona ». Hrvatski geografski glasnik/Croatian Geographical Bulletin 69, n^o 01 (septembre 2007) : 57–68. http://dx.doi.org/10.21861/hgg.2007.69.01.04.

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de Paggi José, S., et W. Koste. « Rotifera from Saladillo river basin (Santa Fe province, Argentina) ». Hydrobiologia 157, n^o 1 (janvier 1988) : 13–20. http://dx.doi.org/10.1007/bf00008805.

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de Paggil, S. José, et W. Koste. « Rotifers from Saladillo river basin (Santa Fe province, Argentina) ». Hydrobiologia 164, n^o 1 (juillet 1988) : 3–11. http://dx.doi.org/10.1007/bf00014345.

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Dante Andres Meller, Roberta Porto Rödel et Carlos Eduardo Agne. « New documented records for the Black-collared Hawk (Busarellus nigricollis, Latham 1790) (Aves : Accipitridae) in Rio Grande do Sul state ». Acta Biológica Catarinense 10, n^o 4 (5 décembre 2023) : 48–52. http://dx.doi.org/10.21726/abc.v10i4.2198.

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The Black-collared Hawk (Busarellus nigricollis) is a buteonine with a wide distribution through neotropical region. It has preference for aquatic habitats, where it feeds on fishes. It has few records for southern Brazil. In Rio Grande do Sul (RS) State, it is rare, and the only documented record is a collected specimen in Santa Cruz do Sul, more than seventy years ago. Here we report new documented records for western and central region of RS. The first one was a juvenile observed in December 2020 at the Wetland of Butuí-mirim. The second one was an immature observed on April 2021 at Butuí River. Both observations were made in São Borja, and reaffirm its occurrence in the Butuí River Basin. The third record was in the central region of RS in June 2022, and its occurrence may be associated to the low Jacuí River. The regional status of the Black-collared Hawk is unclear. It was considered threatened in the past, but now it is regarded as not applicable for evaluation. The Butuí River Basin has many wetlands in the course of its rivers, although some were drained and converted into rice fields. Future actions should be considered regarding the conservation of the wetlands of Butuí River Basin.

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Díaz Lozada, José Manuel, Marcelo García, Horacio Herrero, Ana I. Heredia Ligorria, Fabián Lopez, Edgar Castelló et Juan P. Brarda. « Caracterización experimental y numérica de eventos de crecida extraordinarios en la cuenca del río carcarañá, Argentina ». Aqua-LAC 8, n^o 1 (31 mars 2016) : 10–20. http://dx.doi.org/10.29104/phi-aqualac/2016-v8-1-02.

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La cuenca del Río Carcarañá (subcuenca de la Cuenca del Plata), es un importante sistema fluvial ubicado en la región central de la República Argentina, que posee un área de más de 50.000 km2. La cuenca se extiende sobre el centrosudeste de la provincia de Córdoba y el sur de la provincia de Santa Fe, siendo esta región unos de los sitios agrícolas más productivos del país y del mundo. El río Carcarañá posee tres importantes tributarios: (a) río Tercero o Ctalamochita, (b) río Saladillo y (c) arroyo Tortugas. Dichos tributarios contribuyen al escurrimiento total del río Carcarañá, con una gran variabilidad estacional de caudales. En los años 2014 y 2015 se registraron en la cuenca importantes crecidas que provocaron la inundación de numerosas ciudades y campos en el sudeste de la provincia de Córdoba y sur de la provincia de Santa Fe (más de un millón de hectáreas inundadas). Frente a esta problemática fue necesario generar un conocimiento más detallado del comportamiento de la cuenca frente a eventos de crecida, para brindar a los organismos de gestión la información necesaria para la toma de decisiones. Es por ello que el objetivo del presente trabajo es caracterizar, de forma experimental y numérica, el escurrimiento superficial de este sistema fluvial para los eventos de crecida de los años 2014 y 2015, con el fin de desarrollar herramientas que permitan a las autoridades de gestión tomar las medidas necesarias para mitigar los efectos de este tipo de eventos extraordinarios. Para cumplir con esto se realizó la cuantificación de caudales en diferentes puntos de la cuenca (que incluyó la evaluación del funcionamiento de los órganos de descarga de la presa de Embalse de Río Tercero), mediante el uso de un ADCP diseñado para aguas poco profundas. Con la información obtenida, se determinaron los parámetros hidráulicos del flujo y se realizó el ajuste de curvas Altura-Caudal para nueve secciones en toda la cuenca y se analizó la evolución de los hidrogramas en diferentes secciones en donde se refleja cómo impacta la operación de los órganos de evacuación del embalse en los caudales escurridos. Finalmente, utilizando la información obtenida de las mediciones de campo se implementaron y calibraron dos modelos hidráulicos unidimensionales del escurrimiento en el cauce del río Tercero en las localidades de Bell Ville y Villa María (ubicadas en la provincia de Córdoba-Argentina). Los resultados obtenidos fueron utilizados en el período 2015/2016 por los organismos de gestión para determinar medidas estructurales y no estructurales a implementar.

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Leenheer, Jerry A., George R. Aiken, Greg Woodside et Katherine O'connor-Patel. « DOM in Recharge Waters of the Santa Ana River Basin ». Journal - American Water Works Association 99, n^o 6 (juin 2007) : 118–31. http://dx.doi.org/10.1002/j.1551-8833.2007.tb07960.x.

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Cruz, Rafael Cabral, et Vagner Neves de Godoy. « AUTOGESTÃO DOS RECURSOS HÍDRICOS – ESTUDO DE CASO DA BACIA HIDROGRÁFICA DO RIO SANTA MARIA-RS ». Ciência e Natura 38, n^o 2 (31 mai 2016) : 980. http://dx.doi.org/10.5902/2179460x21911.

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The basin of the river Santa Maria, located on the southwest border of RS and has an area of 15,740 km². Irrigated agriculture is the activity that has the highest water demand in the basin. The aim of this article is to evaluate the decision- making process on the conflict of public supply and supply in rice growing crops in the River Basin Santa Maria and evaluate the role of negotiation of conflicts generated in water scarcity . It is proposed also to analyze the discussions and effective actions of the Committee in relation to local agreements and self-management.

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Moschini-Carlos, Viviane, Marcelo Luiz Martins Pompêo, Felipe de Lucia Lobo et Sergio Tadeu Meirelles. « Impact of coal mining on water quality of three artificial lakes in Morozini River Basin (Treviso, Santa Catarina State, Brazil) ». Acta Limnologica Brasiliensia 23, n^o 3 (29 février 2012) : 271–81. http://dx.doi.org/10.1590/s2179-975x2012005000007.

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AIM: To assess water quality of three lakes located in an abandoned coal mining area, in the Morozini River basin (Treviso, Santa Catarina State, Brazil). METHODS: The study sites were three lakes mining pits flooded after deactivation, near the drainage basin of the Morozini River (Treviso City, Santa Catarina State, Brazil). Samplings were carried out in profile in the limnetic region during two seasons (Summer in February and Winter in July). RESULTS: In general, the three lakes showed high concentrations of SO4-2, Mg, Fe, Al, Ca, Ba, Si, Zn, Ni, Na, K, Sr, B, Cd, Cr, Pb and Cu. CONCLUSIONS: Coal mining activity and waste disposal practices adopted by the mining companies in the Morozini River basin have drastically affected the water quality of the examined lakes and made them inappropriate for diverse human uses, such as leisure, swimming and fishing.

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Vari, Richard P., Carl J. Ferraris Jr. et Mário C. C. de Pinna. « The Neotropical whale catfishes (Siluriformes : Cetopsidae : Cetopsinae), a revisionary study ». Neotropical Ichthyology 3, n^o 2 (juin 2005) : 127–238. http://dx.doi.org/10.1590/s1679-62252005000200001.

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The catfishes of the subfamily Cetopsinae of the Neotropical family Cetopsidae are revised. Four genera, Cetopsidium new genus, Cetopsis, Denticetopsis, and Paracetopsis Bleeker are recognized as valid. Bathycetopsis, Hemicetopsis, and Pseudocetopsis are considered synonyms of Cetopsis and Paracetopsis Eigenmann & Bean and Cetopsogiton synonyms of Paracetopsis. Thirty-seven species are recognized in the Cetopsinae. Cetopsidium includes six species: C. ferreirai, new species, rio Trombetas; C. minutum, Essequibo River; C. morenoi, central and western portions of río Orinoco; C. orientale, coastal rivers of Suriname and French Guiana, and tentatively rio Tocantins and rio Xingu; C. pemon, new species, río Caura, río Caroni, río Meta, and rio Branco; and C. roae, new species, Rupununi River. Cetopsis includes 21 species: C. amphiloxa, río San Juan, río Atrato, and río Patia, western Colombia, and rivers of northwestern Ecuador; C. arcana, new species, rio Tocantins; C. baudoensis, río Baudo; C. caiapo, new species, rio Tocantins; C. candiru, Amazon basin; C. fimbriata, new species, río Truando; C. coecutiens, rio Amazonas, rio Tocantins, and río Orinoco; C. gobioides, upper rio São Francisco, rio Paraná, río Uruguay, and rio Juquiá; C. jurubidae, río Jurubidá; C. montana, new species, western portions of Amazon basin; C. motatanensis, Lago Maracaibo basin; C. oliveirai, Amazon basin; C. orinoco, río Orinoco, río Aroa, and río Yaracuy; C. othonops, río Magdalena and río Sinú; C. parma, western Amazon basin; C. pearsoni, new species, upper portions of rio Madeira; C. plumbea, western portions of rio Amazonas; C. sandrae, new species, rio Tapajós; C. sarcodes, new species, rio Tocantins; C. starnesi, new species, northwestern río de La Plata and southern rio Madeira; and C. umbrosa, new species, western río Orinoco. Cetopsis chalmersi is a synonym of C. gobioides. Cetopsis macroteronema is a synonym of C. plumbea. Denticetopsis includes seven species: D. epa, new species, rio Tocantins; D. iwokrama, new species, Siparuni River; D. macilenta, Potaro River; D. praecox, río Baria; D. royeroi, upper río Negro; D. sauli, upper río Negro; and D. seducta, new species, western portions of rio Amazonas and río Orinoco. Paracetopsis consists of three species: P. atahualpa, new species, río Tumbes, northwestern Peru, and río Zarumilla, southwestern Ecuador; P. bleekeri, río Guayas and río Santa Rosa, south-western Ecuador; and P. esmeraldas, new species, rivers of northwestern Ecuador. Cetopsis ventralis and C. occidentalis are synonyms of Paracetopsis bleekeri. A neotype is designated for Paracetopsis bleekeri. Lectotypes are designated for Cetopsis candiru, Cetopsis chalmersi, and Cetopsis plumbeus.

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Rosales, Alan G., Clementine Junquas, Rosmeri P. da Rocha, Thomas Condom et Jhan-Carlo Espinoza. « Valley–Mountain Circulation Associated with the Diurnal Cycle of Precipitation in the Tropical Andes (Santa River Basin, Peru) ». Atmosphere 13, n^o 2 (18 février 2022) : 344. http://dx.doi.org/10.3390/atmos13020344.

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The Cordillera Blanca (central Andes of Peru) represents the largest concentration of tropical glaciers in the world. The atmospheric processes related to precipitations are still scarcely studied in this region. The main objective of this study is to understand the atmospheric processes of interaction between local and regional scales controlling the diurnal cycle of precipitation over the Santa River basin located between the Cordillera Blanca and the Cordillera Negra. The rainy season (December–March) of 2012–2013 is chosen to perform simulations with the WRF (Weather Research and Forecasting) model, with two domains at 6 km (WRF-6 km) and 2 km (WRF-2 km) horizontal resolutions, forced by ERA5. WRF-2 km precipitation shows a clear improvement over WRF-6 km in terms of the daily mean and diurnal cycle, compared to in situ observations. WRF-2 km shows that the moisture from the Pacific Ocean is a key process modulating the diurnal cycle of precipitation over the Santa River basin in interaction with moisture fluxes from the Amazon basin. In particular, a channeling thermally orographic flow is described as controlling the afternoon precipitation along the Santa valley. In addition, in the highest parts of the Santa River basin (in both cordilleras) and the southern part, maximum precipitation occurs earlier than the lowest parts and the bottom of the valley in the central part of the basin, associated with the intensification of the channeling flow by upslope cross-valley winds during mid-afternoon and its decrease during late afternoon/early night.

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Botelho, MLLA, LM Gomiero et FMS Braga. « Feeding of Oligosarcus hepsetus (Cuvier, 1829) (Characiformes) in the Serra do Mar State Park - Santa Virgínia Unit, São Paulo, Brazil ». Brazilian Journal of Biology 67, n^o 4 (novembre 2007) : 741–48. http://dx.doi.org/10.1590/s1519-69842007000400022.

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We describe the diet of Oligosarcus hepsetus, in the Santa Virgínia Unit of the Serra do Mar State Park. The Paraibuna and Grande rivers in the basin of the Paraíba do Sul River were sampled monthly from January to December 2004. The Alimentary Preference Degree and the frequency of occurrence indices were used to analyze the food items. The diets of Oligosarcus hepsetus in the two localities sampled were very similar, and reinforced the importance of the streamside forests in establishing and maintaining biotic and abiotic conditions in these environments. The species had a carnivorous diet that differed with ontogeny: smaller individuals were principally insectivorous and larger ones ichthyophagous.

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Cao, Qian, Alexander Gershunov, Tamara Shulgina, F. Martin Ralph, Ning Sun et Dennis P. Lettenmaier. « Floods due to Atmospheric Rivers along the U.S. West Coast : The Role of Antecedent Soil Moisture in a Warming Climate ». Journal of Hydrometeorology 21, n^o 8 (1 août 2020) : 1827–45. http://dx.doi.org/10.1175/jhm-d-19-0242.1.

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AbstractPrecipitation extremes are projected to become more frequent along the U.S. West Coast due to increased atmospheric river (AR) activity, but the frequency of less intense precipitation events may decrease. Antecedent soil moisture (ASM) conditions can have a large impact on flood responses, especially if prestorm precipitation decreases. Taken together with increased antecedent evaporative demand due to warming, this would result in reduced soil moisture at the onset of extreme precipitation events. We examine the impact of ASM on AR-related floods in a warming climate in three basins that form a transect along the U.S. Pacific Coast: the Chehalis River basin in Washington, the Russian River basin in Northern California, and the Santa Margarita River basin in Southern California. We ran the Distributed Hydrology Soil Vegetation Model (DHSVM) over the three river basins using forcings downscaled from 10 global climate models (GCMs). We examined the dynamic role of ASM by comparing the changes in the largest 50, 100, and 150 extreme events in two periods, 1951–2000 and 2050–99. In the Chehalis basin, the projected fraction of AR-related extreme discharge events slightly decreases. In the Russian basin, this fraction increases, however, and more substantially so in the Santa Margarita basin. This is due to increases in AR-related extreme precipitation events, as well as the fact that the relationship of extreme precipitation to extreme discharge is strengthened by projected increases in year-to-year volatility of annual precipitation in California, which increases the likelihood of concurrent occurrence of large storms and wet ASM conditions.

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PROVENZANO R., FRANCISCO, NADIA MILANI et CARLOS ARDILA R. « A new species of the catfish genus Cordylancistrus (Siluriformes, Loricariidae) from the Sierra Nevada de Santa Marta, Colombia ». Zootaxa 4329, n^o 3 (4 octobre 2017) : 256. http://dx.doi.org/10.11646/zootaxa.4329.3.4.

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As a part of an assessment of loricariid catfishes inhabiting the Andes of Colombia, specimens belonging to an interesting new species were identified. The new species is described herein, and it is tentatively included in the genus Cordylancistrus. The new species can be easily distinguished among its congeners by the presence of a unique diagnostic character: a fleshy keel or excrescence, black or dark brown, over the posterior tip of supraoccipital. Specimens of the new species were captured in rivers of the Sierra Nevada de Santa Marta and the Sierra de Perijá that drain to the Magdalena River Basin and Caribbean Sea. The occurrence of one species of Cordylancistrus in the Sierra Nevada de Santa Marta could have interesting biogeographic implications for hypotheses related to the geological history of northwestern corner of South America or to the dispersal or vicariance models used to explain biogeographical patterns of related species in Colombia.

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Kieniewicz, Paul M., et Bruce P. Luyendyk. « A gravity model of the basement structure in the Santa Maria Basin, California ». GEOPHYSICS 51, n^o 5 (mai 1986) : 1127–40. http://dx.doi.org/10.1190/1.1442167.

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The Santa Maria Basin in southern California is a lowland bounded on the south by the Santa Ynez River fault and on the northeast by the Little Pine‐Foxen Canyon‐Santa Maria River faults. It contains Neogene sedimentary rocks which rest unconformably on a basement of Cretaceous and older clastic rocks. Analysis of over 4 000 gravity stations obtained from the Defense Mapping Agency suggests that the Bouguer anomaly contains a short‐wavelength component arising from a variable‐density contrast between the basin’s Neogene units and the Cretaceous basement. A three‐dimensional inversion of the short‐wavelength component (constrained by wells drilled to basement) yields a structure model of the basement and the average density of the overlying sediments, assuming that the basement does not contain large‐scale density variations. The density anomalies modeled in the Neogene sediments, showing higher densities in the basin troughs, can be related to diagenetic changes in the silica facies of the Monterey and Sisquoc formations. The basement structure model shows the basin as composed of parallel ridges and troughs, trending west‐northwest and bounded by steep slopes interpreted as fault scarps. The basin is bounded on the west by a north‐south trending slope which may also represent a fault scarp.

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Deng, Xin, Michael Carney, David E. Hinton, Stephen Lyon, Greg Woodside, Cuong N. Duong, Sang-Don Kim et Daniel Schlenk. « Biomonitoring Recycled Water in the Santa Ana River Basin in Southern California ». Journal of Toxicology and Environmental Health, Part A 71, n^o 2 (11 décembre 2008) : 109–18. http://dx.doi.org/10.1080/15287390701613017.

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Carrión-Mero, Paúl, Fernando Morante-Carballo, Valery Vargas-Ormaza, Boris Apolo-Masache et María Jaya-Montalvo. « A Conceptual Socio-Hydrogeological Model Applied to Sustainable Water Management. Case Study of the Valdivia River Basin, Southwestern Ecuador ». International Journal of Sustainable Development and Planning 16, n^o 7 (30 novembre 2021) : 1275–85. http://dx.doi.org/10.18280/ijsdp.160708.

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The scientific community has a growing interest in understanding the interaction of the human-water system in water resource models. In Santa Elena (Ecuador), Valdivia, San Pedro, Sinchal, Barcelona and Carrizal communities are located in a semi-arid area, making the water supply a critical problem for local communities. In addition to the climatic conditions of the sector, the main problem is the weak participation in the integral management of the groundwater resource by the stakeholders involved. Specifically, there is evidence of a lack of ancestral-technical knowledge in management strategies and the fact that the demand for water for agriculture, tourism, and their basic needs exceed the sustainable supply capacity. The present study assesses the natural and anthropic conditions of the middle and lower basin of the Valdivia river through a socio-hydrogeological conceptual model of the river-aquifer system to develop productive activities in an environment of sustainability. The study methodology consists of four phases: i) river basin data analysis, ii) hydrogeological studies, iii) application of the Participatory Action Research (PAR) and Strengths-Weaknesses-Opportunities-Threats (SWOT) analysis, and iv) conceptual model of the river-aquifer system. The results show that the socio-hydrogeological model of the Valdivia River basin has four systems: hydrogeological, ecological, economic, and social. In addition, the research detected problems present in the systems, such as droughts due to the influence of natural phenomena, aquifer overexploitation, lack of aquifer sustainability techniques, weak management and control of water resources, contamination of water sources and a lack of support from government agencies. The systems identified allow JAAPR-Valdivia to manage strategies to solve the problems detected in search of the sustainability of water resources.

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Rabelo, Desirée Cipriano, et Andréa Barborsa Alves. « NEM TODA PARTICIPAÇÃO É IGUAL : planejamento de recursos hídricos a partir dos níveis de empoderamento ». Revista de Políticas Públicas 24, n^o 1 (24 juin 2020) : 442. http://dx.doi.org/10.18764/2178-2865.v24n1p442-467.

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Para avaliar a qualidade democrática dos processos participativos de planejamento de recursos hídricos (PRHs), especialmente “como se participa”, o artigo buscou as referências clássicas dos níveis de participação, em particular os níveis adotados pelas organizações multilaterais: Informação, Consulta e Envolvimento Ativo. Com base nesses níveis, classificou as informações sobre métodos/estratégias participativas dos relatórios oficiais dos processos de elaboração de PRHs das bacias dos Doce, São Francisco, Velhas, Santa Maria da Vitória e Jucu e Piracicaba, Capivari e Jundiaí. Parte da premissa que nem toda participação é igual e há formas crescentes de partilha de poder na relação governo-cidadão. A análise aponta a banalização do termo “participativo” e a necessidade da transparência dos objetivos e abrangência da participação pública nos PRHs e processos semelhantes.Palavras-chave: Participação pública. Recursos hídricos. Planejamento. Plano de bacia.NOT ALL PARTICIPATION IS EQUAL: river basin planning from the levels of empowermentAbstractIn order to evaluate the democratic quality of participation in water resources planning processes (PRHs), especially in “the methods of participation”, the research takes the classic references of participation levels, particularly, the levels assumed by the multilateral organizations: Information, Consultation and Active Involvement. This was used to classify the official reports about participation methods/strategies by of five basin planning of: Doce , São Francisco, Santa Maria da Vitória and Jucu and Piracicaba, Capivari and Jundiaí rivers. The premise is that not all participation is equal and that there are increasing forms of power sharing in the government-citizen relationship. The analysis shows the trivialization of the term “participation” and the need for transparency of the objectives and scope of public participation in the PRHs and similar processes.Keywords: Public participation. Water resources. Planification. River basin plans.

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Nicholson, Uisdean, Andrew Carter, Paula Robinson et David I. M. Macdonald. « Eocene–Recent drainage evolution of the Colorado River and its precursor : an integrated provenance perspective from SW California ». Geological Society, London, Special Publications 488, n^o 1 (20 décembre 2018) : 47–72. http://dx.doi.org/10.1144/sp488-2019-272.

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AbstractThe Colorado River in the SW of the USA is one of Earth's few continental-scale rivers with an active margin delta. Deformation along this transform margin, as well as associated intra-plate strain, has resulted in significant changes in sediment routing from the continental interior and post-depositional translation of older deltaic units. The oldest candidate deposits, fluvial sandstones of the Eocene Sespe Group, are now exposed in the Santa Monica Mountains, 300 km to the north of the Colorado River. Heavy mineral data from this basin indicate that sediment was sourced by a large river system, with some affinity to the early Pliocene Colorado River, but was unlikely to have been integrated across the Colorado Plateau. Sedimentological and mineralogical evidence from the earliest (c. 5.3 Ma) unequivocal Colorado River-derived sediments in the Salton Trough provide evidence for a rapid transition from locally derived sedimentation. Lack of evidence for a precursor phase of suspended-load sediment suggests that drainage capture took place in a proximal position, favouring a ‘top-down’ process of lake spillover. Following drainage integration, significant changes in heavy mineral assemblages of fluvio-deltaic sediments, particularly evident from apatite–tourmaline and garnet–zircon indices, as well as U–Pb ages of detrital zircons, document the integration of the fluvial system to its present form and progressive incision of the Colorado Plateau from the Miocene to the present.

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Carbonera, Mirian, Daniel Loponte et Bruna Schneider. « The role of the artificial ponds for the conservation of mammals in the state of Santa Catarina ». Ambiente e Agua - An Interdisciplinary Journal of Applied Science 17, n^o 6 (22 novembre 2022) : 1–11. http://dx.doi.org/10.4136/ambi-agua.2857.

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Man has profoundly modified the upper valley of the Uruguay River and its basin. The plains of these valleys and the lower areas of the hills have been modified for agricultural production, leaving small patches of wild forest on the tops of the hills, where wildlife takes refuge. These less modified sectors generally lack water. Therefore, the wild mammals must descend to the bottom of the valleys to drink. However, there are numerous fence lines between the hills and the rivers and streams which prevent the fauna access to these watercourses, so they ingest water from artificial ponds present in the agricultural establishments instead, which is reflected in the high values of δ18O observed in the bone bioapatite of local wild mammals. This finding highlights the importance of artificial reservoirs distributed in the agricultural landscape of Santa Catarina for the preservation of wildlife and the importance of their sanitary monitoring to prevent the transmission of diseases from livestock to wildlife. Keywords: artificial ponds, Oxygen-18, Santa Catarina, stable isotopes, wildlife preservation.

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Leite, Olavo da Costa, Saulo de Oliveira Lima, Lawrence Nóbrega de Oliveira, Rodrigo José Da Silva, Gilson Araújo De Freitas, Osvaldo José Ferreira Júnior et Allan Deyvid Pereira Da Silva. « MORPHOMETRIC CHARACTERIZATION OF PART OF MURICIZAL RIVER WATERSHED - TOCANTINS, BRAZIL ». AGRI-ENVIRONMENTAL SCIENCES 5 (6 novembre 2019) : 0. http://dx.doi.org/10.36725/agries.v5i0.1184.

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The aim of this study was to carry out a superficial characterization on part of the watershed of Muricizal river, in Tocantins, from estimates based on given climatic and morphometric parameters. The river basin studied here comprises an area from the monitoring station of River Muricizal, at Muricilândia pluviometric station in Tocantins state code ANA 28150000 (- 7°08’43’’ and – 48°36’37’’, altitude 193m). The pluviometric stations were: code 748002, municipality of Nova Olinda - TO, 748003 municipality of Muricilândia – TO, and code 749000 municipality of Arapoema - TO. The basin under study covers the municipalities of Muricilândia - TO (11.0%), Santa Fe do Araguaia - TO (6.0%), Araguaína - TO (70.3%) and Nova Olinda - TO (12.7%). The watershed is divided into two sub - basins, comprising the total sub - basin area of River Rio Preto (69,978.73 hectares) and part of the sub basin of Muricizal river (86.847.32 hectares), comprising a total drainage area of 1,568.26 km2. The analysis of the physiographic data is necessary, since it allows morphometric understanding about the area, such as land cover, land use, rainfall data, which is important to minimize impacts that can be caused.

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Batista-Silva, Valéria Flávia, Augusto Frota, Elaine Antoniassi Luiz Kashiwaqui, Milza Celi Fedatto Abelha, Dayani Bailly, Éder André Gubiani et Weferson Júnio da Graça. « Ichthyofauna from three streams of the lower Iguatemi River in the upper Paraná ; river basin, Brazil ». Check List 14, n^o 1 (23 mars 2018) : 363–78. http://dx.doi.org/10.15560/14.2.363.

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The ichthyofauna from 3 streams (Água Boa, Perobão, and Santa Maria) to the lower Iguatemi River were inventoried, which is located in the upper Paraná river basin, in Mato Grosso do Sul state, Brazil. Sites in the upper, intermediate, and lower portions of each stream were quarterly electrofished from March to December 2008. All sampled fish (n = 6,816 individuals) represented 43 species of 5 orders, and 16 families. The most abundant species was Phalloceros harpagos (63.5%), followed by Astyanax aff. paranae (10.6%), Hypostomus ancistroides (5.9%), Gymnotus inaequilabiatus (3.4%), and Knodus moenkhausii (2.7%). Despite the high ichthyofauna richness in the lower portion of Iguatemi River, the need to implement and/or expand soil conservation practices and riparian forest restoration is of utmost importance to maintain these populations in the long term.

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Barreto, Patricia, Santiago Dogliotti et Carlos Perdomo. « Surface Water Quality of Intensive Farming Areas Within the Santa Lucia River Basin of Uruguay ». Air, Soil and Water Research 10 (1 janvier 2017) : 117862211771544. http://dx.doi.org/10.1177/1178622117715446.

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The Santa Lucia River basin provides drinking water to 60% of Uruguay population. The input of excessive amounts of nitrogen and phosphorus both from point and nonpoint sources could impair surface water quality and prevent its use for human consumption. The objective of this work was to evaluate surface water quality in small catchments under agricultural use located within this river basin. To this end, 5 streams and 4 small polders were surveyed between September 2008 and December 2009. The median concentrations of total phosphorus and total nitrogen in the streams across all sites and periods were 770 and 1659 µg L−1, respectively, exceeding in the case of total phosphorus national and international thresholds. Furthermore, soluble phosphorous, the most readily available form to algae, represented 88.3% of total phosphorus. Concentrations of phosphorous and nitrogen in polders were also high. The eutrophication process of this water bodies could be linked to the intensive agricultural land use in the area because the nutrient input from cities and industries was not relevant in these catchments.

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Bonato, Karine Orlandi, et Juliano Ferrer. « New record and distribution extension of Phalloceros spiloura Lucinda, 2008 (Cyprinodontiformes : Poeciliidae) ». Check List 9, n^o 6 (1 décembre 2013) : 1545. http://dx.doi.org/10.15560/9.6.1545.

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Phalloceros spiloura Lucinda, 2008 is known from the coastal drainages of Rio Grande do Sul and Santa Catarina States, Iguaçu and Uruguai river basins. Its geographic distribution is herein extended to a new basin, the Laguna dos Patos system, an isolated costal drainage from Southern Brazil.

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Paca, Victor Hugo da Motta, Gonzalo Espinoza-Dávalos, Daniel Moreira et Georges Comair. « Variability of Trends in Precipitation across the Amazon River Basin Determined from the CHIRPS Precipitation Product and from Station Records ». Water 12, n^o 5 (27 avril 2020) : 1244. http://dx.doi.org/10.3390/w12051244.

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The Amazon River Basin is the largest rainforest in the world. Long-term changes in precipitation trends in the basin can affect the continental water balance and the world’s climate. The precipitation trends in the basin are not spatially uniform; estimating these trends only at locations where station data are available has an inherent bias. In the present research, the spatially distributed annual precipitation trends were studied in the Amazon River Basin from the year 1981 to 2017 using the Climate Hazards Group InfraRed Precipitation with Station data (CHIRPS) product. The precipitation trends were also cross-validated at locations where station data were available. The research also identifies clusters within the basin where trends showed a larger increase (nine clusters) or decrease in precipitation (10 clusters). The overall precipitation trend in the Amazon River Basin over 37 years showed a 2.8 mm/year increase, with a maximum of 45.1 mm/year and minimum of −37.9 mm/year. The highest positive cluster was in Cuzco in the Ucayali River basin, and the lowest negative was in Santa Cruz de la Sierra, in the upstream Madeira River basin. The total volume of the incoming precipitation was 340,885.1 km3, with a withdrawal of −244,337.1 km3. Cross-validation was performed using 98 in situ stations with more than 20 years of recorded data, obtaining an R2 of 0.981, a slope of 1.027, and a root mean square error (RMSE) of 363.6 mm/year. The homogeneous, standardized, and continuous long-term time series provided by CHIRPS is a valuable product for basins with a low-density network of stations such as the Amazon Basin.

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Shamir, Eylon, Elia M. Tapia-Villaseñor, Mary-Belle Cruz-Ayala et Sharon B. Megdal. « A Review of Climate Change Impacts on the USA-Mexico Transboundary Santa Cruz River Basin ». Water 13, n^o 10 (16 mai 2021) : 1390. http://dx.doi.org/10.3390/w13101390.

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In the parched Upper Santa Cruz River Basin (USCRB), a binational USA–Mexico basin, the water resources depend on rainfall-triggered infrequent flow events in ephemeral channels to recharge its storage-limited aquifers. In-situ data from the basin highlight a year-round warming trend since the 1980s and a concerning decline in average precipitation (streamflow) from 1955–2000 to 2001–2020 by 50% (87.6%) and 17% (63%) during the winter and summer, respectively. Binational sustainable management of the basins water resources requires a careful consideration of prospective climatic changes. In this article we review relevant studies with climate projections for the mid-21st century of four weather systems that affect the region’s precipitation. First, the North American Monsoon (NAM) weather system accounts for ~60% of the region’s annual rainfall. The total NAM precipitation is projected to decline while heavy rainfall events are expected to intensify. Second, the frequency of the pacific cold fronts, the region’s prevalent source of winter precipitation, is projected to decline. Third, the frequency and intensity of future atmospheric rivers, a weather system that brings winter rainfall to the region, are projected to increase. Fourth, the frequency and intensity of large eastern pacific tropical cyclones (TC) are expected to increase. On rare occasions, remnants of TC make their way to the USCRB to cause storms with considerable impact on the region’s water resources. In contrast to the high confidence projections for the warming trend to persist throughout the mid-21st century, the precipitation projections of these four weather systems affecting the region encompass large uncertainties and studies have often reported contradicting trends. An added source of uncertainty is that the USCRB is located at the periphery of the four rain-bearing weather systems and small mesoscale changes in these weather systems may have accentuated impacts on their edges. Despite the high uncertainty in the projections of future precipitation, the early 21st century drying trend and the projected mid-21st century decline in precipitation events serve as a pressing call for planning and actions to attain sustainable water resources management that reliably satisfies future demands.

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Serna M., Daniel José, Cesar Enrique Tamaris-Turizo et Luis Carlos Gutiérrez Moreno. « Spatial and temporal distribution of Trichoptera (Insecta) larvae in the Manzanares river Sierra Nevada of Santa Marta (Colombia) ». Revista de Biología Tropical 63, n^o 2 (11 février 2015) : 465. http://dx.doi.org/10.15517/rbt.v63i2.15604.

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The aquatic insects are important bioindicators of water quality in rivers and streams. The order Trichoptera is part of this group, plays an important role in aquatic systems and because of the multiple functions they fulfill, it is essential to know about their biodiversity. This study aimed to know the Trichoptera composition, and its spatial and temporal distribution, in close relationship with the available microhabitats, and some physical and chemical variables, in the middle and lower sections of the Manzanares river basin (Sierra Nevada of Santa Marta, Colombia). A total of eight microhabitats were sampled in three sites from August 2002 to February 2003, and during the rainy and dry seasons. A total sample of 3 316 Trichoptera larvae were collected, belonging to 10 family and 14 genera; six of these genera and one family are new records for the Magdalena department. The caddisflies presented the greatest abundance and richness on leaves in pool, leave in riffles and stones in riffle, where Nectopsyche (28%), Leptonema (17%) and Smicridea (15%) were the more predominant genus. Structure and composition of Trichoptera genus in each site changed in function to the rainfall pattern, and physical and chemical variables presented in the basin, showing the lowest abundance and richness during high rainfall period (October and November), and the greatest abundance and richness in low rainfall period (December, January and February). Likewise, stations with higher values of dissolved oxygen and lower in temperature and conductivity reported the greatest abundance of Trichoptera. The Trichoptera showed affinity to the specific microhabitats, variations in their composition in relationship whit climatic periods and pollution levels of the river. To know others aspects about the Trichoptera distribution, we recommended continuing these studies including annual cycles and increasing the altitudinal gradients.

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Balasch, J. C., J. Tuset et J. L. Ruiz-Bellet. « Reconstructing the 1874 Santa Tecla flash flood in the Ondara River (Ebro Basin, NE Spain) ». Advances in Geosciences 26 (2 juillet 2010) : 45–48. http://dx.doi.org/10.5194/adgeo-26-45-2010.

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Abstract. The Santa Tecla flash flood, a very heavy event occurred in Tàrrega (Catalonia, NE Iberian Peninsula) in 1874, was reconstructed with hydraulic and hydrological modelling tools. The hydrograph obtained in a first stage and the basin soil moisture information ultimately allowed the estimation of the range of the rainstorm magnitude which caused the flash flood. The reconstruction of historical floods has proved useful to improve the flood probability analysis, especially in ungauged basins.

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Palhares, J. C. P., A. L. Guidoni, R. L. R. Steinmetz, M. R. Mulinari et G. C. Sigua. « Impacts of mixed farms on water quality of Pinhal river sub-basin, Santa Catarina, Brazil ». Archivos de Zootecnia 61, n^o 236 (décembre 2012) : 493–504. http://dx.doi.org/10.4321/s0004-05922012000400002.

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Oakley, N. S., F. Cannon, E. Boldt, J. Dumas et F. M. Ralph. « Origins and variability of extreme precipitation in the Santa Ynez River Basin of Southern California ». Journal of Hydrology : Regional Studies 19 (octobre 2018) : 164–76. http://dx.doi.org/10.1016/j.ejrh.2018.09.001.

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Nico, Leo, Peter Butt, Gerald Johnston, Howard Jelks, Matthew Kail et Stephen Walsh. « Discovery of South American suckermouth armored catfishes (Loricariidae, Pterygoplichthys spp.) in the Santa Fe River drainage, Suwannee River basin, USA ». BioInvasions Records 1, n^o 3 (septembre 2012) : 179–200. http://dx.doi.org/10.3391/bir.2012.1.3.04.

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Oliva, Antonio, et Jorge Olcina. « Historical Floods and Territorial Planning : Lessons Learned and Opportunities Lost after the Santa Teresa Flood (1879) in the Segura Basin (Spain) ». Land 13, n^o 1 (25 décembre 2023) : 28. http://dx.doi.org/10.3390/land13010028.

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Historical cartography is one of the principal tools used in correct flood adaptation and management based on territorial planning. In fact, Directive 2007/60/EC on the assessment and management of flood risks includes the analysis and inventory of historical floods in a river basin for assessing the flood hazard and risk existing in a geographical space. This study seeks to analyse the largest flood registered in the Segura basin, occurring on 14–15 October 1879, which attracted enormous interest on a national and international level. The methodology applied is based on the consultation of historical sources and historical cartography, and the elaboration of maps using GIS, enabling comparisons to be made with current flood zones. The results show that the Santa Teresa flood was very similar to the Spanish National Cartographic Systems for Flood Areas (SNCZI) map for a 500-year return period. Furthermore, it allows the identification of the sensitive points along the course of the river or those prone to burst banks or overflowing, which practically coincide with the current maps and modelling conducted by the official bodies. Furthermore, the buildings in the floodable area in the historical cartography have been counted and reconstructed on a GIS map and the SNCZI. Massive anthropic occupation through the construction of settlements and infrastructures (hospitals, schools, centers for the elderly, roads and railways) in the Guadalentín valley and the Segura River increases the risk of flooding in the study area, despite the numerous control and regulation works carried out in the Segura River basin.

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Amaral, Lucas Kister, Sabrina Baesso Cadorin, Álvaro José Back, Fernanda Dagostin Szymanski et Claudia Weber Corseuil. « Estimation of soil loss by the USLE model in a mountain basin in the south of Santa Catarina state, Brazil ». Revista Eletrônica em Gestão, Educação e Tecnologia Ambiental 24 (4 décembre 2020) : e20. http://dx.doi.org/10.5902/2236117062695.

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Water erosion is a factor of soil degradation that is triggered by the impact of raindrops originated by intense rainfall disaggregating the soil, followed by the carrying of particles by surface runoff. In the erosion process, in addition to soil loss, nutrients, fertilizers, and pesticides are carried resulting in water courses and water pollution. Erosion can have a major impact on agricultural production, when soil use and management techniques are not used. Therefore, this study aimed to evaluate the soil loss in the Malacara river basin, which is a sub-basin of the Mampituba river basin characterized by a contrasting relief, with high altitudes in the escarps of Serra Geral and floodplain. The method used for the development of this research was the application of the Universal Soil Loss Equation (USLE). USLE soil loss estimation requires the following factors: rainfall erosivity (R), soil erodibility (K), slope length (L), slope steepness (S), soil use and management (C), and erosion control practice factor (P). The estimated rainfall erosivity was 5,754.2 MJ mm ha-1 h-1 year-1. Erodibility was determined for the soils present in the basin, highlighting a high value for gleysoil. The topographic factor (LS) showed values from 0 to greater than 20, which corresponds to the low to very high runoff potential. The floodplain showed lower runoff rates, while for the locations close to the enclosed valleys in the Malacara canyon, the runoff potential varied from high to very high. The soil use and management factors and conservation practices (CP) obtained a maximum value of 0.404, corresponding to the exposed soil; the second most representative class was agricultural areas, with a value of 0.145. The soil loss in the Malacara river basin varied from 0 to more than 200 t ha-1 year-1. In fact, 87.38% of the area presents a degree of sheet erosion normal to slight and, only 2.94% of the area has a high or very high degree of erosion. Moreover, due to the relief characteristics with shallow soils and intense rainfall in mountainous basins, knowing and understanding soil losses due to erosion is crucial for the adequate management of water resources in river basins.

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Toriani, Sônia dos Santos, Larissa Delmônego, Heloiza Fiamoncini, Maria Helena Packer, Aline Scheller Coan, Paula Roberta Perondi Furtado, Eduardo Manoel Pereira, Débora Delwing-Dal Magro, Daniela Delwing-de Lima et Therezinha Maria Novais de Oliveira. « Preclinical Toxicological Evaluation of the Consumption of Fish from the Cachoeira River Hydrographic Basin in Rats ». International Journal of Advanced Engineering Research and Science 9, n^o 6 (2022) : 437–50. http://dx.doi.org/10.22161/ijaers.96.45.

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Fish is one of the healthiest food sources once it has proteins, vitamins, minerals and the omega-3 polyunsaturated lipids. Nevertheless, to be healthy, the protein in fish meat must not have contaminants further than allowed. This study aimed to investigate the preclinical toxicologic effects of consumption of fish meat from Cachoeira river (Joinville, Santa Catarina, Brazil). Groups of rats were divided and received for a month: standard ration, farmed fish meat and fish meat from Cachoeira river twice a week. One day after the last exposition, animals were euthanized and blood, spleen, heart, liver, kidney, cerebellum, and cerebral cortex were collected to measure oxidative stress, biochemical and hematological parameters. Metals levels were also analyzed in fish meat by atomic emission spectrometry. Significant elevation of carbonylated proteins were observed in heart and liver and thiobarbituric acid reactive substances in liver, plasma and cerebellum were observed. Total sulfhydryl content decreased significantly in cerebellum, liver and heart, and decreased catalase activity in the liver and superoxide dismutase activity in the kidneys were also present among rats who consumed fish meat from Cachoeira river. No modification of hematological parameters was observed, and only significant decrease of HDL occurred among biochemical parameters. Analysis of metals in river fish meat showed a fivefold increase in zinc and aluminum compared to farmed fish meat. Short-term exposure to fish meat from the Cachoeira River resulted in increased oxidative stress, liable to be transferred through the food chain, possibly associated with the increased presence of heavy metals.

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Serpa-Usta, Yeraldin, Alvaro Alberto López-Lambraño, Carlos Fuentes, Dora-Luz Flores, Mario González-Durán et Alvaro López-Ramos. « Santa Ana Winds : Multifractal Measures and Singularity Spectrum ». Atmosphere 14, n^o 12 (28 novembre 2023) : 1751. http://dx.doi.org/10.3390/atmos14121751.

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A multifractal analysis based on the time series of temperature, pressure, relative humidity, wind speed, and wind direction was performed for 16 weather stations located in the hydrographic basin of the Guadalupe River in Baja California, Mexico. Our analysis included a 38-year dataset from MERRA-2 database, we investigated the multifractal nature of daily time series data for climatic variables associated with the Santa Ana Winds. We employed the Multifractal Detrended Fluctuation Analysis (MFDFA) method to extract multifractal complexity parameters (α0, ∆α, and r). This was adequate to evaluate the multifractality of the time series that represented the conditions of the phenomenon’s occurrence. From the estimation of the generalized Hurst exponent (hq), it was possible to characterize the time series of the meteorological variables in terms of the characteristics of persistence, anti-persistence, or randomness. Finally, the values corresponding to the parameters and characteristics of the multifractal spectrum or singularities can be used as quantitative and qualitative indicators to describe the dynamics of meteorological processes during the occurrence of the Santa Ana winds in the Guadalupe basin.

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Arantes, Arielle. « Suscetibilidade à Erosão Laminar e Linear da Bacia Hidrográfica do Rio Vermelho e a sua Relação com o Uso e Cobertura da Terra em 2012 ». Revista Brasileira de Geografia Física 15, n^o 6 (2022) : 3032–46. http://dx.doi.org/10.26848/rbgf.v15.6.p3032-3046.

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Loss of soil by erosion leads to reduced agricultural productivity, and when at an advanced stage, it drives soil degradation, rendering it unfit for agricultural cultivation. The objective of this work was to evaluate the susceptibility of the Rio Vermelho Hydrographic Basin (BHRV) to laminar erosion and the susceptibility to linear erosion of the Córrego Grande sub-basin, located in the most susceptible compartment of the BHRV, in order to identify favorable areas to erosion. The high basin, which encompasses the municipalities of Goiás, Buriti de Goiás, Fazenda Nova, Novo Brasil and Mossamedes, was the compartment that presented the greatest susceptibility to laminar erosion, due to the presence of soils of high erodibility on a relief of high slope, favoring the superficial flow in detriment to the infiltration of water in the soil. In this compartment, pasture areas located in Serra de Santa Rita in Faina, and Serra Dourada in Goiás, had some terrain whose soil use was incompatible with the susceptibility to laminar erosion, presenting high potential for the occurrence of erosive foci of laminar origin. The lowest susceptibility to laminar erosion occurred in the low basin, particularly in the municipalities of Britania and Aruanã, because it is a flat relief area of low altitudes on recent sedimentary deposits. Comparing susceptibility to laminar erosion with linear erosion for the Córrego Grande sub-basin, differently from the former, susceptibility to linear erosion is higher in intermediate slopes (7-17%), which favors a higher concentration of surface runoff.

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Rimoldi, Pablo, et Nicolás Chimento. « Diversity of medium and large native mammals in the River basin Carcarañá, province of Santa Fe (Argentina) ». Revista del Museo Argentino de Ciencias Naturales 20 (2018) : 333–41. http://dx.doi.org/10.22179/revmacn.20.575.

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Dutra, Wander Clay Pereira, Ronaldo Fia et Celso Bandeira de Melo Ribeiro. « Water quality modeling in the Paraibuna River in Juiz de Fora/MG : diagnosis and prognosis ». Revista Brasileira de Ciências Ambientais 57, n^o 2 (2022) : 256–67. http://dx.doi.org/10.5327/z2176-94781288.

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To support the implementation of instruments of the National Water Resources Policy, as well as the new legal framework for basic sanitation, the environmental assessment of water courses becomes important to guide the planning, monitoring and management of a watershed. Thus, this research aims to contribute to the creation of information structures about the Paraibuna River and its water basin in the central and more urbanized region of Juiz de Fora/MG. The QUAL2K model was used considering two different hydrological periods. The study considered water quality data for the following variables: dissolved oxygen, biochemical oxygen demand, temperature, electrical conductivity and pH. The flow rates in the Paraibuna River and its tributaries were quantified using an Acoustic Doppler Current Profile (ADCP) and a hydrometric windmill. With the calibrated model, future water quality scenarios were simulated for the moment when the new sewage treatment plants are operating at maximum capacity, in accordance with the Juiz de Fora’s Municipal Plan for Basic Sanitation Service. The results show that the Paraibuna River, in the central section of Juiz de Fora, provided data with reduced water quality, mainly in the dry season, leading us to conclude that the flow had a direct influence on the water quality. As for the simulated scenarios, we reached the conclusion that the best result obtained for the sewage treatment of the Paraibuna River will be achieved when the treatment conditions of scenario 3 are applied. This scenario includes the Wastewater Treatment Plants of União Indústria, Santa Luzia, and the renovation of the Wastewater Treatment Plant of Barbosa Laje, with an expected reduction of 90% of the polluting load in the streams covered by the present work, and a reduction of 50% of the organic load upstream of the section under study.

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Francini, Morgana F., et Antonio C. Beaumord. « Environmental sensitivity mapping for oil spills in the Canhanduba River Basin, Santa Catarina State, Southern Brazil ». Brazilian Journal of Aquatic Science and Technology 12, n^o 2 (19 décembre 2008) : 61. http://dx.doi.org/10.14210/bjast.v12n2.p61-72.

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Gupta, Neha, Lindsay Bearup, Katharine Jacobs, Eve Halper, Chris Castro, Hsin-I. Chang et Julia Fonseca. « Stakeholder-Informed Hydroclimate Scenario Modeling in the Lower Santa Cruz River Basin for Water Resource Management ». Water 15, n^o 10 (16 mai 2023) : 1884. http://dx.doi.org/10.3390/w15101884.

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The Lower Santa Cruz River Basin Study (LSCRB Study) is a collaborative effort of regional and statewide water management stakeholders working with the US Bureau of Reclamation under the auspices of the 2009 SECURE Water Act. The impacts of climate change, land use, and population growth on projected water supply in the LSCRB were evaluated to (1) identify projected water supply and demand imbalances and (2) develop adaptation strategies to proactively respond over the next 40 years. A multi-step hydroclimate modeling and risk assessment process was conducted to assess a range of futures in terms of temperature, precipitation, runoff, soil moisture, and evapotranspiration, with a particular focus on implications for ecosystem health. Key hydroclimate modeling process decisions were informed by ongoing multi-stakeholder engagement. To incorporate the region’s highly variable precipitation pattern, the study used a numerical “weather generator” to develop ensembles of precipitation and temperature time series for input to surface hydrology modeling efforts. Hydroclimate modeling outcomes consistently included increasing temperatures, and generated information related to precipitation responses (season length and timing, precipitation amount) considered useful for evaluating potential ecosystem impacts. A range of risks was identified using the hydroclimate modeling outputs that allowed for development of potential adaptation strategies.

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Moretto, Daiane Lautert, Ruben Edgardo Panta, Adilson Ben da Costa et Eduardo Alexis Lobo. « Calibration of water quality index (WQI) based on Resolution nº 357/2005 of the Environment National Council (CONAMA) ». Acta Limnologica Brasiliensia 24, n^o 1 (16 août 2012) : 29–42. http://dx.doi.org/10.1590/s2179-975x2012005000024.

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Environmental monitoring studies in the Hydrographical Basin of Pardo River, RS, Brazil, in the time series from 2007 to 2009, showed no agreement between the water quality evaluation obtained through the Water Quality Index (WQI - NSF), which ranged from "regular" to "good", and the Environment National Council (CONAMA) Resolution 357/2005, which was bad ("class 4"), highlighting as critical variables for this classification the thermotolerant coliforms and the phosphate concentration, indicating process of water eutrophication, related to the large amount of nutrients and organic load from domestic sewage and excess fertilizers used in agriculture. AIM: This research aimed to calibrate the WQI - NSF for the Pardo River Basin, based on the CONAMA Resolution 357/2005. METHODS: Using the database (2007 a 2009) from the Laboratory of Limnology of the University of Santa Cruz do Sul (UNISC), RS, corresponding to the environmental monitoring studies realized in the Hydrographical Basin of Pardo River new weights of the relative importance of the variables used to calculate the WQI were attributed, by means of principal component analysis. RESULTS: There was a significant agreement between the results of the assessment of water quality using the CONAMA Resolution 357/2005 and the new WQI calibrated. CONCLUSION: The results certify the use of the calibrated WQI in environmental monitoring programs in lotic systems belonging to Guaíba Hydrographical Basin, RS.

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Napier, Tiffany J., Ingrid L. Hendy, M. Florencia Fahnestock et Julia G. Bryce. « Provenance of detrital sediments in Santa Barbara Basin, California, USA : Changes in source contributions between the Last Glacial Maximum and Holocene ». GSA Bulletin 132, n^o 1-2 (24 avril 2019) : 65–84. http://dx.doi.org/10.1130/b32035.1.

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AbstractDetrital terrestrial sediments preserved in near-shore marine basins bear distinctive geochemical identifiers that can be used to identify the on-shore sediment sources and sediment routing through time. Santa Barbara Basin (SBB), offshore of southern California, USA, contains a well-known, continuous, high-resolution Holocene flood record that can provide insights into the frequency and changes in on-shore sources across time for such events. Here SBB-adjacent stream bed sediments are characterized using mineralogical, elemental, and radiogenic strontium and neodymium isotopic compositions. Modern and Holocene SBB flood deposits and Last Glacial Maximum (LGM) sediments were similarly analyzed. The Southern Slopes of the Santa Ynez Mountains and Topatopa Mountains account for ∼85% of SBB Holocene flood deposit sediments, as calculated from Sr-Nd isotope mixing models. During the LGM sea level low stand, the Southern Slopes contribution increased (to ≥90%), while relative sediment contribution from Santa Clara River diminished. This loss was likely compensated, however, by increased sediment flux from the Southern Slopes and the Channel Islands.

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MOREIRA, R. F., et H. POLIVANOV. « Determination of the Erodibility Parameters of a Cutting Slope in Sana River Sub-Basin (Macaé, RJ, Brasil) ». Anuário do Instituto de Geociências - UFRJ 42, n^o 1 (13 mai 2019) : 682–94. http://dx.doi.org/10.11137/2019_1_682_694.

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Diniz, Paulo Baltazar, Hatus de Oliveira Siqueira, Tâmer de Oliveira Faleiros, Nycolas Levy Pereira, José Augusto Senhorini, André Luiz Henríques Esguícero et Célio Bertelli. « Fishes from lakes and tributaries of the Rio Santa Bárbara, Sapucaí‑Mirim/Grande hydrographic basin, São Paulo, Brazil ». Check List 15, n^o 4 (9 août 2019) : 629–40. http://dx.doi.org/10.15560/15.4.629.

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Rio Santa Bárbara, a small tributary of the Rio Sapucaí-Mirim, has undergone severe human intervention over the past 80 years. We surveyed the ichthyofauna of this river, some surrounding lakes, and the Rio Potreiro, a tributary. Four campaigns were carried out, 2 in the dry season and 2 in the rainy season. We found 920 specimens at 12 sites and included 32 species belonging to 6 orders and 16 families. The order Characiformes was found to be best represented in our study, followed by the orders Cichliformes and Siluriformes. The family Characidae was the most numerous, followed by the families Cichlidae and Poeciliidae. A specimen of Brycon nattereri was collected from the Rio Santa Bárbara; this species is Critically Endangered in the state of São Paulo.

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Claudino, Wesley Vicente, Vinícius Alves Andrade Oliveira, Edgley Pereira Silva, Sylvia Karla Ferreira Santos et Ademilson Sampaio Oliveira. « ATRIBUTOS FÍSICOS E CONSERVACIONISTAS DA BACIA HIDROGRÁFICA DO RIO SANTA HELENA ». Nativa 8, n^o 1 (5 février 2020) : 91. http://dx.doi.org/10.31413/nativa.v8i1.6953.

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O objetivo do trabalho foi verificar as características físicas e conservacionistas da bacia hidrográfica do Rio Santa Helena com o uso do sensoriamento remoto e geoprocessamento, e criar um modelo empírico de vulnerabilidade a erosão para a região. Foram realizadas as análises da densidade de drenagens, área total, perímetro total, coeficiente de compacidade, fator de forma, índice de circularidade, padrão de drenagem, comprimento do curso d´água principal, comprimento total dos cursos d´água e ordem dos cursos d´água. Para a criação do modelo de vulnerabilidade à erosão foi realizada a classificação supervisionada através do algoritmo de máxima verossimilhança, o cálculo do potencial erosivo das chuvas para a região, além da análise da declividade e do tipo de solo. Os resultados obtidos foram: área de drenagem 1461,68 km²; perímetro 329,16 km; comprimento axial 68,81 km; coeficiente de compacidade 2,41; fator de forma 0,31 e o índice de circularidade 0,17. A hidrografia apresenta padrão dendrítico, de 5ª ordem e com densidade de drenagem baixa (0,96 km/km²). Esses dados indicam um formato irregular e alongado da bacia. Quanto ao potencial erosivo, a bacia apresenta de baixo a médio risco, principalmente devido à declividade e à cobertura do solo.Palavras-chave: manejo de bacias hidrográficas; geoprocessamento; modelagem erosiva. PHYSICAL AND CONSERVATIONAL ATRIBUTES OF THE SANTA HELENA RIVER WATER BASIN ABSTRACT: The objective of this work was to verify the physical and conservation characteristics of the Santa Helena River basin using remote sensing and geoprocessing, and to create an empirical model of erosion vulnerability for the region. Drainage density, total area, total perimeter, compactness coefficient, shape factor, circularity index, drainage pattern, length of main watercourse, total length of watercourses and order of watercourses were analyzed. For the creation of the erosion vulnerability model, the supervised classification was performed through the maximum likelihood algorithm, the rainfall erosive potential calculation for the region, as well as the slope and soil type analysis. The results obtained were: drainage area 1461.68 km²; perimeter 329.16 km; axial length 68.81 km; compactness coefficient 2.41; form factor 0.31 and circularity index 0.17. The hydrography has a dendritic pattern of 5th order and low drainage density (0.96 km / km²). These data indicate an irregular and elongated shape of the basin. As for the erosive potential, the basin presents low to medium risk, mainly due to the slope and the ground cover.Keywords: management of watersheds; geoprocessing; erosive modeling.

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