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Letteratura scientifica selezionata sul tema "Northern rivers"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 1 febbraio 2022

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Articoli di riviste sul tema "Northern rivers"

1

Morales, Maria C., e Jaime Meruane. "The northern river shrimp Cryphiops caementarius (Decapoda, Palaemonidae). Research chronology between 1958 and 2008, I: distribution, population status, biology and life cycle". Crustaceana 86, n. 12 (2013): 1441–51. http://dx.doi.org/10.1163/15685403-00003259.

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The present study is a review of the main inland water malacostracan species of northern Chile: Cryphiops caementarius (Molina, 1782). This species sustains the local fisheries in northern and central Chilean hydrographical basins. Cryphiops caementarius, in Chile known as the northern river shrimp, is endemic to rivers west of the Andes Mountains in Peru, and south from Chancay-Lambayeque River and the rivers in the northern Chilean littoral up to 32°55′S. Research on this species in its natural habitat consigned between 1958 to 2008 was directed to population knowledge, including mainly the existing populations in rivers in the Regions of Atacama and Coquimbo. Important advances were also made with regards to the study of the embryonic development, biology, life cycle and reproduction that serve as a basis for the technological development of juvenile production in a controlled environment.

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2

Philippsen, Bente, e Jan Heinemeier. "Freshwater Reservoir Effect Variability in Northern Germany". Radiocarbon 55, n. 3 (2013): 1085–101. http://dx.doi.org/10.1017/s0033822200048001.

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The freshwater reservoir effect is a potential problem when radiocarbon dating fish bones, shells, human bones, or food crusts on pottery from sites near rivers or lakes. The reservoir age in hardwater rivers can be up to several thousand years and may be highly variable. Accurate 14C dating of freshwater-based samples requires knowing the order of magnitude of the reservoir effect and its degree of variability. Measurements on modern riverine materials may not give a single reservoir age correction that can be applied to archaeological samples, but they show the order of magnitude and variability that can also be expected for the past. This knowledge will be applied to the dating of food crusts on pottery from the Mesolithic sites Kayhude at the Alster River and Schlamersdorf at the Trave River, both in Schleswig-Holstein, northern Germany.

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3

Ganf, George G., e Naomi Rea. "Potential for algal blooms in tropical rivers of the Northern Territory, Australia". Marine and Freshwater Research 58, n. 4 (2007): 315. http://dx.doi.org/10.1071/mf06161.

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Rivers in the Northern Territory (NT) of Australia are under pressure from increasing vegetation clearance, land use and nutrient run-off. The literature on algal blooms clearly identifies the predisposing factors but in the NT, these factors are not well researched. We report on the potential for tropical rivers to experience problems related to algal growth. NT rivers were found to have a low nutrient status and a viable inoculum of blue-green, brown and green algal communities. The growth response of these algal groups to nutrient enrichment via bioassays and pulse-amplitude-modulation (PAM) fluorometry measurements varied among rivers and the addition of N, P or N&P. However, the overwhelming findings were that all rivers had the potential to experience algal blooms with enrichment. Back-calculations based on the chlorophyll concentrations recorded in bioassay experiments and stoichiometric ratios of chlorophyll:nutrients suggest there are pools of biologically available organic forms of N and P in addition to inorganic forms. The role of river length in the development of algal blooms was investigated: the longer the river reach, the slower the flow, and the greater the availability of nutrients, the higher potential for algal blooms. Given the strong indications that increased nutrient run-off to tropical rivers will result in algal blooms, prudent land-use and development with nutrient management strategies is essential.

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4

Ulvan, Eva Marita, Anders Foldvik, Arne Johan Jensen, Bengt Finstad, Eva Bonsak Thorstad, Audun Håvard Rikardsen e Tor Fredrik Næsje. "Return migration of adult Atlantic salmon (Salmo salar L.) to northern Norway". ICES Journal of Marine Science 75, n. 2 (18 settembre 2017): 653–61. http://dx.doi.org/10.1093/icesjms/fsx183.

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Abstract The return migration of adult Atlantic salmon was investigated by analysing recaptures of individuals tagged and released as smolts in the River Altaelva and the River Halselva using a catch per unit effort approach. Although the salmon were recaptured over a large area along the coastline (from >1100 km south to > 500 km northeast of their home rivers), the results indicated a relatively accurate homeward navigation for most individuals. The straying rate to rivers other than the home river was 9%. Multi-sea-winter salmon returned earlier in the season than one-sea-winter salmon, but the geographical distribution of recaptures did not differ. Recaptures were equally distributed north and south of the home rivers, implying that salmon were arriving to the coast both north and south of their home rivers and that they may have returned from different ocean areas. This was supported by the fact that several salmon were recaptured in both the southern and northern parts of the North Atlantic Ocean, including at the Faroes, south coast of Greenland, Svalbard and in the Barents Sea. This study supports the hypothesis that the coastal phase of the natal homing in migrating fish species is neither passive nor guided by currents alone.

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5

Lehnhoff, Erik A., Fabian D. Menalled e Lisa J. Rew. "Tamarisk (Tamarixspp.) Establishment in its Most Northern Range". Invasive Plant Science and Management 4, n. 1 (marzo 2011): 58–65. http://dx.doi.org/10.1614/ipsm-d-10-00036.1.

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AbstractTamarisk, a shrub or small tree native to Eurasia, was introduced to North America in the early 1800s and is now naturalized throughout many riparian areas of the southwestern United States, where extensive research has been conducted. It is a more recent invader to the northern Great Plains, and fewer studies have been conducted on tamarisk ecology and management in this area. The objectives of this research were to investigate the overwintering potential of tamarisk seeds in Montana and the relationship between hydrologic conditions and historic tamarisk establishment. Emergence of seedlings from seeds stored for different time periods at a range of temperatures was evaluated in a greenhouse study. Emergence rates declined after a 7-d storage period, but storage time had no effect on subsequent emergence rates, and seeds stored at −14 C and 5 C had greater emergence rates than those stored at 20 C and 35 C. Patterns in tamarisk establishment were assessed through age and hydrologic data collected from a reservoir (Fort Peck), a regulated river (Bighorn), and an unregulated river (Yellowstone) in Montana. These data indicated that tamarisk establishment at the reservoir was closely related to historic water levels, whereas establishment on rivers was not related to flow. However, data from the rivers indicated that recruitment differed between regulated and unregulated rivers, with the regulated river having less recruitment after the period of initial colonization than the unregulated river. Our results show that tamarisk seeds have the ability to overwinter in Montana and can establish under a range of flow conditions, indicating potential recolonization of sites after tamarisk removal.

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6

Senay, C., S. Harvey-Lavoie, C. J. Macnaughton, G. Bourque e D. Boisclair. "Morphological differentiation in northern pike (Esox lucius): the influence of environmental conditions and sex on body shape". Canadian Journal of Zoology 95, n. 6 (giugno 2017): 383–91. http://dx.doi.org/10.1139/cjz-2016-0159.

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Morphological differentiation may allow individuals to cope with prevailing environmental conditions. Morphological differentiation in fish characterized by sagittiform shape and ambush predator behaviour, such as northern pike (Esox lucius L., 1758), has rarely been addressed. Morphological differentiation was assessed in two rivers exhibiting contrasting flow regimes: a hydropeaking river characterized by large and frequent fluctuations in flow rates and an unregulated river. An increase in northern pike movement rate was observed in the hydropeaking river. Therefore, morphological features enhancing sustained and burst swimming, as well as manoeuvrability, were expected. Our objectives are to (i) compare morphology between the two rivers and (ii) assess morphological differentiation between sexes. Using geometric morphometrics, shape significantly diverged between rivers irrespective of sex and between sexes in the hydropeaking river. Individuals from the hydropeaking river had more elongated heads, deeper bodies and caudal peduncles, and longer dorsal fin insertions than individuals from the unregulated river. Caudal fin differences between rivers were not consistent between sexes. Morphological differentiation suggested a trade-off among adaptations for sustained and burst swimming, as well as manoeuvrability, to cope with variable flows in a hydropeaking river. Morphological differentiation may allow the exploitation of spatially and temporally variable environmental conditions, including those stemming from river flow regulation.

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7

Jensen, Arne Johan, e Bjørn Ove Johnsen. "Different Adaptation Strategies of Atlantic Salmon (Salmo salar) Populations to Extreme Climates with Special Reference to some Cold Norwegian Rivers". Canadian Journal of Fisheries and Aquatic Sciences 43, n. 5 (1 maggio 1986): 980–84. http://dx.doi.org/10.1139/f86-120.

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Some of the salmon rivers on the western and northern coasts of Norway are very cold, and the sea temperature outside these rivers is almost always higher than that in the river. Growth rates of Atlantic salmon (Salmo salar) parr and smolt ages and sizes have been examined in three such cold rivers. We found indications that the lower temperature limit for growth of Atlantic salmon is not a fixed temperature, but varies from population to population according to the temperature regime of their environment. Smolts are small, with average sizes of 12–13 cm total length. Females dominated in number among the smolts, but the dominance was less pronounced than in most other rivers. Strategies used by Norwegian salmon in cold rivers are therefore different from those employed by salmon in the northern extremes of the salmon's range in Canada.

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8

Degerman, Erik, Kjell Leonardsson e Hans Lundqvist. "Coastal migrations, temporary use of neighbouring rivers, and growth of sea trout (Salmo trutta) from nine northern Baltic Sea rivers". ICES Journal of Marine Science 69, n. 6 (1 luglio 2012): 971–80. http://dx.doi.org/10.1093/icesjms/fss073.

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Abstract Degerman, E., Leonardsson, K., and Lundqvist, H. 2012. Coastal migrations, temporary use of neighbouring rivers, and growth of Sea trout (Salmo trutta) from nine northern Baltic Sea rivers – ICES Journal of Marine Science, 69: 971–980. The wild migratory trout (Salmo trutta) stocks in the northern Baltic Sea are threatened, and the fishery is thought to play a significant role in the population decline. Therefore, knowledge about the migration patterns of these stocks is needed to develop appropriate management plans. For this reason, we analysed the movement pattern from recaptures of mandatory releases of tagged hatchery-reared trout smolt from nine rivers in the region (1998–2007). The median time from release until recapture was 366 days, and the median migration distance at recapture was 27 km, with a dominating southward direction for northern stocks. Most of the recaptured fish were immature (65%), and recaptures in rivers (55%) dominated over recaptures along the coast (44%). Riverine recaptures were most frequent during autumn–spring. A total of 16% of all recaptures in rivers occurred in non-natal rivers. Straying was about twice as frequent among fish from small rivers as from large rivers. The results from the river Gideälven indicate that using broodstock from other rivers in stocking programmes may lead to a high proportion of strayers. In addition, temporary use of neighbouring rivers was more frequent in large rivers during winter. Growth, in terms of length increment, was high, especially in fish from southern parts of the Baltic, and higher than in neighbouring warmer and more saline sea areas.

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9

Bataragoa, Nego Elvis, e Alex D. Kambey. "Species of Fish in rivers in the Northern Peninsula of Sulawesi Island". Jurnal Ilmiah PLATAX 9, n. 1 (22 giugno 2021): 66. http://dx.doi.org/10.35800/jip.9.1.2021.34330.

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This study aims to determine the species of fish found in the Poigar River, Ranoyapo River, Maruasey River, Talawaan River, and Likupang River in the northern peninsula of Sulawesi Island. These five rivers empty into the Sulawesi Sea. Sampling was carried out in the upstream, middle and downstream parts of the river, all sampling areas were freshwater areas, estuary areas with brackish water types were not included in this study. Sampling was carried out using cast nets and electric shocks. There are 58 species (16 orders, 21 families, 40 genera). Families Gobidae (9 genera, 19 species) and Eleotridae (8 genera 13 species), 19 other families have only 3 or 2 or 1 species. There are 28 species of Ranoyapo River, 25 species of Maruasey River, 23 species of Poigar River, 15 species of Likupang River, and 9 species of Talawaan River. Eel Anguilla marmorata widely distributed in five rivers, and Eleotris melanosoma (Eleotridae) Osteochilus hasseltii (Cyprinidae) in four rivers. The other species are only found in 3, 2, and 1 rivers. There are 27 species found in only one river.Keywords: Freshwater; River; Species; Fish.AbstrakPenelitian ini bertujuan untuk mengetahui spesies ikan yang terdapat di Sungai Poigar, Sungai Ranoyapo, Sungai Maruasey, Sungai Talawaan dan Sungai Likupang di semenanjung utara Pulau Sulawesi. Lima sungai ini bermuara di Laut Sulawesi. Pengambilan sampel dilakukan pada bagian hulu, tengah dan bagian hilir sungai, seluruh wilayah pengambilan sampel adalah wilayah air tawar, daerah muara dengan tipe air payau tidak termasuk dalam penelitian ini. Pengambilan sampel dilakukan dengan menggunakan jaring lempar dan kejutan listrik. Terdapat 58 spesies (16 ordo, 21 famili, 40 genus). Famili Gobidae (9 genus, 19 spesiies) dan Eleotridae (8 genus 13 spesies), 19 Famili yang lain hanya memiliki 3 atau 2 atau 1 spesies. Sungai Ranoyapo terdapat 28 spesies, Sungai Maruasey 25 spesies, Sungai Poigar 23 spesies, Sungai Likupang 15 spesies dan Sungai Talawaan 9 spesies. Ikan sidat Anguilla marmorata menyebar luas pada lima sungai, dan Eleotris melanosoma (Eleotridae) Osteochilus hasseltii (Cyprinidae) pada empat sungai. Spesies yang lain hanya ditemukan pada 3, 2 dan 1 sungai. Terdapat 27 spesies yang ditemukan hanya pada satu sungai.Keywords: Freshwater; River; Species; Fish.

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10

Wrona, Fred J., e William Gummer. "Northern rivers ecosystem initiative: contextual overview". Hydrological Processes 20, n. 19 (2006): 4005–7. http://dx.doi.org/10.1002/hyp.6429.

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Più fonti

Tesi sul tema "Northern rivers"

1

Mustow, Stephen Eric. "Aquatic macroinvertebrates and environmental quality in rivers in Northern Thailand". Thesis, University of London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266399.

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2

Dodkins, Ian Robert. "Developing a macrophyte index of ecological status for Northern Ireland's rivers". Thesis, University of Ulster, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.232838.

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3

Eberhardt, Ellen. "Dynamics of intermediate-size stream outlets, northern Oregon coast". PDXScholar, 1988. https://pdxscholar.library.pdx.edu/open_access_etds/3787.

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This study measured and evaluated the relation of coastal foredune morphology to stream beach outlets, and investigated the processes associated with the stream outlet. Intermediate-size streams were studied, and defined as those that flow across the beach most of the year but have no tidal influence. Fifty-four of these streams were found along the northern Oregon coast between the Columbia River and Yaquina Bay. Crescent Lake Outlet, Saltair Creek and Daley Lake Outlet were chosen as study streams for further investigation.

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4

Eriksson, Tobias. "Variations in bioavailability of dissolved organic matter during a spring flood episode in northern Sweden /". Umeå : Swedish Univ. of Agricultural Sciences, 2004. http://epsilon.slu.se/9658927.pdf.

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5

Norris, James 1953. "Preliminary hydraulic characterization of a fractured schist aquifer at the Koongarra uranium deposit, Northern Territory, Australia". Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/291720.

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The Koongarra uranium deposit is hosted by quartz-chlorite schists. A conceptual model for the hydrogeology of the deposit is proposed on the basis of lithologic criteria and limited hydraulic testing. Water-level and aquifer-test data are presented that indicate the deposit lies within a partially confined, heterogeneous, anisotropic fractured-rock aquifer. The aquifer is dynamic with annual, diurnal, and semidiurnal water-level fluctuations. The results of aquifer tests indicate a high degree of connectivity in the aquifer. Fracture-dominated flow is observed in some tests, but the overall aquifer response appears to be that of an equivalent porous medium. A homogeneous, anisotropic model is used to estimate the transmissivity tensor for subregions of the aquifer. Anisotropy is well-developed with north- to east-northeast-oriented principal transmissivities. Northeast directions represent large-scale drawdown patterns and are subparallel to bedrock structure and the Koongarra fault. Northerly directions are localized and may reflect a less extensive fracture fabric or a flexure in the bedrock foliation.

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6

Östergren, Johan. "Migration and genetic structure of Salmo salar and Salmo trutta in northern Swedish rivers /". Umeå : Dept. of Aquaculture, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/2006112.pdf.

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7

O'Connor, William C. K. "An investigation of Atlantic salmon (Salmo salar L.) spawning habitat in Northern Ireland rivers". Thesis, University of Ulster, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268548.

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8

Plumer, Hannah. "Health among the Maya : comparisons across sites in the northern Three Rivers Region, Belize". Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/17969/.

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The aim of this research is to examine the health indicators of the northern Three Rivers Region and compare the results to the larger context of health of the ancient lowland Maya. The research was completed through the analysis of the skeletal populations of three separate Maya sites: Blue Creek, Nojol Nah, and Xnoha, and by comparing results within and among the three sites for a total sample size of 222 individuals. The northern Three Rivers Region had an occupation spanning from the Middle Preclassic through the Terminal Classic periods. Therefore, health through time, as well as between the sexes, presence or absence of cultural bodily modifications in relation to health, and socioeconomic status were all examined within the northern Three Rivers Region study. The osteological results presented suggest that the region was quite stable throughout its long occupation. Whereas elsewhere in the Maya region there have been studies that show dietary differences between males and females and indicate strong preferential treatment of males over females in regards to diet, the skeletal population of the northern Three Rivers Region does not exhibit such discrepancies. This likely has to do with the location of the sites in the Three Rivers Region both in terms of having access to coastal and river trade, as well as being situated near the large Alacranes and Dumb-bell Bajos, which provided a rich agricultural landscape.

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9

Lusardi, Robert A., Michael T. Bogan, Peter B. Moyle e Randy A. Dahlgren. "Environment shapes invertebrate assemblage structure differences between volcanic spring-fed and runoff rivers in northern California". UNIV CHICAGO PRESS, 2016. http://hdl.handle.net/10150/621412.

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Flow variability plays an important role in structuring lotic communities, yet comparatively little is known about processes governing assemblage dynamics in stream ecosystems with stable environmental conditions, such as spring-fed rivers. Volcanic spring-fed rivers (hereafter spring-fed rivers) occur in geologically active landscapes of the western USA and around the globe. We sampled invertebrate assemblages and quantified primary productivity and habitat characteristics of spring-fed and runoff rivers in northern California over 4 seasons. We predicted that abiotic factors would be more stable and nutrient availability greater and that invertebrate density would be greater and diversity lower in spring-fed than in runoff rivers. Runoff rivers exhibited high variability in discharge and temperature, whereas spring-fed rivers were relatively stable with high naturally occurring nutrient levels. On average, NO3- and PO43- concentrations were 40x greater in spring-fed than in runoff rivers. Spring-fed rivers supported nearly 7 to 16x greater densities of invertebrates than runoff systems, depending on season. However, invertebrate species richness was greater in runoff rivers in all seasons. Spring-fed river invertebrate assemblages were strongly correlated with elevated nutrient concentrations and basal C sources, whereas runoff assemblages were associated with discharge variability and median substrate size. We suggest that strong differences in abiotic variability between spring-fed and runoff rivers play an important role in determining invertebrate assemblage structure. Because spring-fed rivers exhibit more stable temperatures throughout the year and lower temperatures during the summer than runoff rivers, they may provide essential refugia for coldwater taxa in a warming climate.

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Crawford, Joseph L. "Effects of Inorganic Nutrients and Dissolved Organic Carbon on Oxygen Demand in Select Rivers in Northern Utah". DigitalCommons@USU, 2013. https://digitalcommons.usu.edu/etd/1959.

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Sewage, agricultural runoff, and atmospheric deposition have greatly increased the amount of nutrients (largely nitrogen (N) and phosphorus (P)) in surface water nationwide. Excess nutrients are associated with algal blooms and dissolved oxygen depletion in many water bodies, but linkages between nutrients and dissolved oxygen have been largely correlative. Biochemical oxygen demand (BOD) is a regulated water quality parameter that is aimed at describing the amount of oxygen consumed during the decomposition of organic matter. Despite the awareness that excess nutrients are linked to dissolved oxygen in rivers, few studies in the nutrient criteria literature discuss BOD measurements or how nutrients may impact BOD. Accordingly, I used factorial experiments to test the effect of inorganic nutrients (as N, P and N+P) and dissolved organic carbon on BOD measurements in Utah streams. The study was carried out from January through summer baseflow in 2011, allowing me to evaluate the effects of spatial and temporal variation of ambient nutrient concentration on oxygen demand. The study design included measurements in streams above and below nutrient point-sources (publicly owned treatment works) and several reference sites. I used classification and regression trees to identify thresholds of TN and TP that separate BOD response to nutrients into statistically distinct groups. My results show that seasonal variation affected BOD levels. As temperatures rose and water levels increased during peak runoff, I observed the highest BOD response to nutrient additions. I also found a significant correlation between BOD and ambient nutrient concentrations during that time period. I identified potential nutrient-related thresholds that could be used to assign numeric criteria that would protect designated uses. The threshold values I found for TN and TP were 0.56 mg/L and 0.09 mg/L, respectively. My results suggest that BOD may be sensitive to nutrient inputs and my experimental approach could be used as one line of evidence to support nutrient criteria related to aquatic life uses.

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Più fonti

Libri sul tema "Northern rivers"

1

Northern Rivers Ecosystem Initiative (Canada). Northern Rivers ecosystem initiative 1998-2003: Final report. [Hull, Québec]: Northern Rivers Ecosystem Initiative, 2004.

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2

Andrew, Blackmore-Dobbyn, a cura di. Return to the rivers: Recipes and memories of the Himalayan river valleys. New York: Lake Isle Press, 2013.

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3

Needham, R. S. Geology of the Alligator Rivers Uranium Field, Northern Territory. Canberra: Australian Govt. Pub. Service, 1988.

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4

Fitzmaurice, M. Watercourse co-operation in Northern Europe: A model for the future. The Hague: TMC Asser Press, 2004.

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5

Janet, Grand, a cura di. Canoeing Ontario's rivers: Great canoe trips in Canada's Northern wilderness. San Francisco: Sierra Club Books, 1986.

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Archer, Laurel. Northern Saskatchewan canoe trips: A guide to fifteen wilderness rivers. Erin, Ont: Boston Mills Press, 2003.

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7

Payne, G. A. Water quality of lakes and streams in Voyageurs National Park, northern Minnesota, 1977-84. St. Paul, Minn: U.S. Dept. of the Interior, U.S. Geological Survey, 1991.

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8

Great Britain. Department of the Environment for Northern Ireland. Environment Service. River and estuary quality in Northern Ireland: Report of the 1991 survey. Belfast: HMSO, 1993.

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9

Dodkins, Ian Robert. Developing a macrophyte index of ecological status for Northern Ireland's rivers. [S.l: The author], 2002.

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10

Usher, Peter J. Towards assessing the effects of Lake Winnipeg regulation and Churchill River diversion on resource harvesting in native communities in northern Manitoba. Winnipeg, Man: Central and Arctic Region, Dept. of Fisheries and Oceans, 1991.

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Capitoli di libri sul tema "Northern rivers"

1

McNamara, James P. "Is There a Northern Signature on Fluvial Form?" In Gravel-Bed Rivers, 541–45. Chichester, UK: John Wiley & Sons, Ltd, 2012. http://dx.doi.org/10.1002/9781119952497.ch38.

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2

Maria, Lazaridou, e Ntislidou Chrysoula. "Macroinvertebrate Assemblages and Biological Status of Rivers in Northern and Central Greece". In The Rivers of Greece, 327–54. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/698_2015_445.

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3

Sylaios, Georgios, e Nikolaos Kamidis. "Environmental Impacts of Large-Scale Hydropower Projects and Applied Ecohydrology Solutions for Watershed Restoration: The Case of Nestos River, Northern Greece". In The Rivers of Greece, 379–401. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/698_2017_473.

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4

Jeffries, Martin O., Kim Morris e Nickolai Kozlenko. "Ice Characteristics and Processes, and Remote Sensing of Frozen Rivers and Lakes". In Remote Sensing in Northern Hydrology: Measuring Environmental Change, 63–90. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/163gm05.

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5

Prygiel, J., e M. Leitao. "Cyanophycean blooms in the reservoir of Val Joly (northern France) and their development in downstream rivers". In Phytoplankton in Turbid Environments: Rivers and Shallow Lakes, 85–96. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-017-2670-2_8.

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6

Sánchez, J. A., G. Blanco e E. Vázquez. "Genetic Status of Atlantic Salmon (Salmo salar) in Asturian Rivers (Northern Spain)". In Genetic Conservation of Salmonid Fishes, 219–25. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-2866-1_18.

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7

Vincent, W. F., e C. Belzile. "UV Effects on Aquatic Microbial Food Webs in Northern Lakes and Rivers". In Ecological Studies, 137–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-642-56075-0_7.

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Pozo, J., A. Basaguren, A. Elósegui, J. Molinero, E. Fabre e E. Chauvet. "Afforestation with Eucalyptus globulus and leaf litter decomposition in streams of northern Spain". In Oceans, Rivers and Lakes: Energy and Substance Transfers at Interfaces, 101–9. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5266-2_8.

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Jongerden, Joost, Zeynep Sıla Akıncı e Ercan Ayboğa. "Water, Politics and Dams in the Mesopotamia Basin of the Northern Middle East: How Turkey Instrumentalises the South-Eastern Anatolia Project for Political, Military and Strategic Interests". In Tigris and Euphrates Rivers: Their Environment from Headwaters to Mouth, 383–99. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-57570-0_16.

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Augustová, Karolína. "Photovoice as a Research Tool of the “Game” Along the “Balkan Route”". In IMISCOE Research Series, 197–215. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-67608-7_11.

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AbstractMigratory pathways across the borders of South Eastern Europe have been commonly recognised within public and policy discourses as the ‘Balkan Route’ (Frontex, 2018; UNHCR, 2019). Yet those pathways do not follow one linear route across the official border checkpoints of former Yugoslav states – Serbia and Bosnia, to the European Union – Croatia and Hungary (Obradovic-Wochnik & Bird, 2019; Stojić & Vilenica, 2019). As often encountered by displaced populations, the journeys consist of perpetually moving onward and being pushed backward across diverse European towns, highways, mountains, forests, rivers, minefields, and camps, necessary to cross to reach western or northern Europe. Displaced people stranded in Serbia and Bosnia generally call their border crossing attempts the ‘game’; the term that conveys the daily mobility struggles, violence and deaths.

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Atti di convegni sul tema "Northern rivers"

1

Suen, Jian-Ping, Edwin E. Herricks e J. Wayland Eheart. "Ecohydrologic Indicators for Rivers of Northern Taiwan". In World Water and Environmental Resources Congress 2004. Reston, VA: American Society of Civil Engineers, 2004. http://dx.doi.org/10.1061/40737(2004)143.

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Stankevičienė, Rasa, e Oksana Survilė. "Land Drainage Development Processes and Changes in the Context of Runoff Change in Northern Lithuania". In 11th International Conference “Environmental Engineering”. VGTU Technika, 2020. http://dx.doi.org/10.3846/enviro.2020.807.

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The impact of the drainage of excessively wet land on river runoff has so far been assessed differently and very carefully because of its complexity and diversity. The article analyses changes of drained land areas and runoff in the river basins of Mūša, Lėvuo Tatula and Nemunėlis. Wet land areas in the Mūša, Lėvuo and Nemunėlis rivers basins account for more than 70% from the total basins area and in the Tatula about 90%. Increase of drained land areas in the studied river basins has no significant influence on the change of river runoff. Studies have shown that the change in drained land areas did not affect the change in runoff height. Drainage does not have a significant effect on changes in the annual runoff distribution of the studied rivers.

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Fedorova, L. L., e A. V. Omelianenko. "Technigue of Georadar Monitoring of Ice Cover of the Northern Rivers". In Saint Petersburg 2008. Netherlands: EAGE Publications BV, 2008. http://dx.doi.org/10.3997/2214-4609.20146968.

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Stephens, Connor, e Sarah G. Evans. "ANALYSIS OF INCREASED BASEFLOW ACROSS NORTHERN EURASIAN RIVERS UNDERLAIN BY PERMAFROST". In Joint 69th Annual Southeastern / 55th Annual Northeastern GSA Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020se-343943.

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Jeleapov, Ana, e Daniela Burduja. "Resursele de apă ale râurilor din Regiunea de Dezvoltare Nord". In Provocări şi tendinţe actuale în cercetarea componentelor naturale şi socio-economice ale ecosistemelor urbane şi rurale. Institute of Ecology and Geography, Republic of Moldova, 2020. http://dx.doi.org/10.53380/9789975891608.12.

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The research is dedicated to assessment of rivers and their resources from the North Development Region of the Republic of Moldova. Main methods used in the study are the statistical ones utilized for estimation of main hydrological characteristics, monitored at gauging stations of national monitoring network. Also, GIS technologies were applied in order to evaluate main rivers characteristics and to perform spatial representation of the area. Main rivers of the pilot area are the Dniester and the Prut transboundary rivers. Analysis of their time series shows that flow is slowly decreasing. The measurements of the flow of main tributaries of the Dniester and Prut rivers show a flow slow increase in the northern part and a slow decrease in the southern part of the region. These rivers do not represent big economic value in comparison with large rivers and groundwater resources.

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Kitazawa, Daisuke, e Jing Yang. "Numerical Study on Circulation and Thermohaline Structures With Effects of Icing Event in the Caspian Sea". In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20667.

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A hydrostatic and ice coupled model was developed to analyze circulation and thermohaline structures in the Caspian Sea. The northern part of the Caspian Sea freezes in the winter. Waters start icing in November and ices spread during December and January. The northern part of the Caspian Sea is covered by ices in severe winters. Ice-covered area is at its maximum during January and February, and then ices begin melting in March and disappear in April. The occurrence of ices must have significant effects on circulation and thermohaline structures as well as ecosystem in the northern Caspian Sea. In the present study, formation of ices is modeled assuming that ices do not move but spread and shrink on water surface. Under the ices, it is assumed that the exchange of momentum flux is impeded and the fluxes of heat and brine salt are given at sea-ice boundary. The ice model was coupled with a hydrostatic model based on MEC (Marine Environmental Committee) Ocean Model developed by the Japan Society of Naval Architect and Ocean Engineers. Numerical simulation was carried out for 20 years to achieve stable seasonal changes in current velocity, water temperature, and salinity. The fluxes of momentum, heat, and salt were estimated by using measurement data at 11 meteorological stations around the Caspian Sea. Inflow of Volga River was taken into account as representative of all the rivers which inflow into the Caspian Sea. Effects of icing event on circulation and thermohaline structures were discussed using the results of numerical simulation in the last year. As a result, the accuracy of predicting water temperature in the northern Caspian Sea was improved by taking the effects of icing event into account. Differences in density in the horizontal direction create several gyres with the effects of Coriolis force. The differences were caused by differences in heat capacity between coastal and open waters, differences in water temperature due to climate, and inflow of rivers in the northern Caspian Sea. The water current field in the Caspian Sea is formed by adding wind-driven current to the dominant density-driven current, which is based on horizontal differences in water temperature and salinity, and Coriolis force.

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Бровко, М., e M. Brovko. "LITHODYNAMIC PROCESSES AND ANTHROPOGENIC FORMS OF RELIEF WITHIN THE NORTHERN COAST OF THE SEA OF AZOV". In Sea Coasts – Evolution ecology, economy. Academus Publishing, 2018. http://dx.doi.org/10.31519/conferencearticle_5b5ce38a684ed4.85578227.

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Modern lithodynamic processes within the northern coast of the Sea of Azov depend on both the endogenous and exogenous factors. At the present stage of the coastal zone evolution the exogenous anthropogenic processes are dominant. Thus, regulation of the Azov Sea rivers has led to a decrease in revenue of alluvium, which feeds the coastal zone of the sea, consequently reducing the rates of accumulation. The intensive development of buildings of different economic values within accumulative spits and mainland coast, without any scientific justification has led to greater abrasion and changes, both qualitative and quantitative characteristics of the lithological flows.

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Chernoshtan, A. V., e A. N. Nikitenkov. "ASSESSMENT OF LANDSCAPE DYNAMICS AND CATCHMENT CHARACTERISTICS OF RIVERS ON THE NORTHERN SLOPE OF ZAILIYSKY ALATAU USING REMOTE SENSING DATA". In Prirodopol'zovanie i ohrana prirody: Ohrana pamjatnikov prirody, biologicheskogo i landshaftnogo raznoobrazija Tomskogo Priob'ja i drugih regionov Rossii. Izdatel'stvo Tomskogo gosudarstvennogo universiteta, 2020. http://dx.doi.org/10.17223/978-5-94621-954-9-2020-91.

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In this article, we develop an approach to a comprehensive study of the relationship in changes in the landscapes of catchment basins on the example of the Northern slope of the Zailiysky Alatau, Almaty region, southern Kazakhstan.

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Siemon, B., A. Steuer, M. Ibs-von Seht, W. Voß, U. Meyer e H. Wiederhold. "Combination of Airborne Geophysical Surveys at the Estuaries of the Weser and Elbe Rivers in Northern Germany". In Remote Sensing 2012. Netherlands: EAGE Publications BV, 2012. http://dx.doi.org/10.3997/2214-4609.20143302.

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Geddes, Brian, Chris Wenzel, Michael Owen, Mark Gardiner e Julie Brown. "Remediation of Canada’s Historic Haul Route for Radium and Uranium Ores: The Northern Transportation Route". In ASME 2011 14th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2011. http://dx.doi.org/10.1115/icem2011-59303.

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Established in the 1930s, the Northern Transportation Route (NTR) served to transport pitchblende ore 2,200 km from the Port Radium Mine in Canada’s Northwest Territories to Fort McMurray in Alberta. From there, the ore was shipped 3,000 km by rail to the Town of Port Hope, Ontario, where it was refined for its radium content and used for medical purposes. Later, transport and refinement focussed on uranium. The corridor of lakes, rivers, portages and roads that made up the NTR included a number of transfer points, where ore was unloaded and transferred to other barges or trucks. Ore was occasionally spilled during these transfer operations and, in some cases, subsequently distributed over larger areas as properties were re-developed or modified. In addition, relatively small volumes of ore were sometimes transported by air to the south. Since 1991, the Low-Level Radioactive Waste Management Office (LLRWMO), working with communities and its consulting contractors, has conducted surveys to identify and characterize spill sites along the NTR where soils exhibit elevated concentrations of uranium, radium and/or arsenic. In addition to significant areas of impact in Fort McMurray, contamination along the NTR was centred in the Sahtu region near Great Bear Lake and along the southern part of the Slave River. Early radiological investigations found contaminated buildings and soil and occasionally discrete pieces of pitchblende ore at many transfer points and storage areas along the NTR. Where possible, survey work was undertaken in conjunction with property redevelopment activity requiring the relocation of impacted soils (e.g., at Tulita, Fort Smith, Hay River, and Fort McMurray). When feasible to consolidate contaminated material locally, it was placed into Long Term Management Facilities developed to manage and monitor the materials over extended timelines. Radiological activity generated by these engineered facilities are generally below thresholds established by Canadian regulators, meaning they are straightforward to maintain, with minor environmental and community impacts. Securing community acceptance for these facilities is critical, and represents the predominant development component of plans for managing ore-impacted soils. In those circumstances where local consolidation is not achievable, materials have been relocated to disposal facilities outside of the region. The LLRWMO is continuing a program of public consultation, technical evaluation and environmental assessment to develop management plans for the remaining ore-impacted sites on the NTR. This paper will highlight current activities and approaches applied for the responsible management of uranium and radium mining legacies.

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Rapporti di organizzazioni sul tema "Northern rivers"

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Devaney, J. R., e P. W. Fralick. Regional sedimentology of the Namewaminikan group, northern Ontario: archean fluvial fans, braided rivers, deltas, and an aquabasin. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/120237.

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Lickorish, W. H., e P. S. Simony. Structure and Stratigraphy of the northern Porcupine Creek Anticlinorium, western Main Ranges Between the Sullivan and Wood Rivers,british Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/132510.

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Stubley, M. P. The northern Beaulieu River Project. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1992. http://dx.doi.org/10.4095/133309.

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Hulbert, L. J., e J. Scoates. Geology of the Fox River Belt, northern Manitoba. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2005. http://dx.doi.org/10.4095/220362.

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Sinclair, W. D., e D. M. Kingston. Rare - Earth - Bearing Apatite near Benjamin River, northern New Brunswick. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1990. http://dx.doi.org/10.4095/129054.

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Borgeld, Jeffry C. Strata Preservation on the Inner Eel River Shelf, Northern California. Fort Belvoir, VA: Defense Technical Information Center, agosto 2001. http://dx.doi.org/10.21236/ada626055.

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Plouffe, A., e S. P. Williams. Regional till geochemistry, gold and pathfinder elements, northern Nechako River, British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1998. http://dx.doi.org/10.4095/210023.

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Utting, J. Lower carboniferous miospore assemblages from the Hart River formation, northern Yukon Territory. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/132680.

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Budkewitsch, P., C. Prévost, G. Pavlic e M. Pregitzer. Watershed mapping and monitoring for northern community impact assessment - Clyde River, Nunavut. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2011. http://dx.doi.org/10.4095/288034.

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Trihey, J. M., E. S. B. McGrath-Cohen e A. M. Haiblen. Exploring for the Future—Hydrochemistry Data Release, Daly River project, Northern Territory. Geoscience Australia, 2020. http://dx.doi.org/10.11636/record.2020.046.

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