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Letteratura scientifica selezionata sul tema "Creek"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 22 giugno 2024

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Articoli di riviste sul tema "Creek"

1

MORKOYUNLU YUCE, Arzu, Arif GÖNÜLOL e Şebnem ERKEBAY. "Trophic Status Assessment In Some Lotic Ecosystem In Turkey (Sakarya Basin)". Journal of the Institute of Science and Technology 13, n. 3 (26 aprile 2023): 2162–73. http://dx.doi.org/10.21597/jist.1173729.

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Benthic diatoms constitute a very important group of organisms in terms of providing information about the water quality of the lotic ecosystems. This research was carried out in Istanbul creek, Aliaga creek, Bostancı creek and Orta creek in the Sakarya basin. The trophic states of these creeks were evaluated according to their diatomes. In the study, the epilithic diatoms were determined to consist of 42 taxa belonging to İstanbul creek, 28 to Bostancı creek, 25 to Orta creek and 20 to Aliaga creek. A total of 51 taxa were determined in the creeks. In this study, Cocconeis pediculus, Ulnaria ulna and Cymbella affinis were found to have the highest abundant at the stations. In the creeks, water temperature, dissolved oxygen and pH were determined as respectively 9.1-14.1 ℃, 8.2-9.4 mg L-1, 7.1- 7.5 and conductivity as 210.2 - 240.4 μS cm-1. Although different results were obtained according to the diatom indices criteria (IBD, SLA,IDSE,IDAP, TID, SID,CEE, WAT, TDI, SHE, TIT) the creeks were determined to be close to water quality class I -II according to the Surface Water Quality Regulation In general, according to the diatom index values, it has been determined that the creeks have good-medium quality water characteristics.

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2

Greer, Richard, Peter McGowan, Jacqueline Michel e Norman Meade. "INJURY TO MUSKRATS (ONDATRA ZIBETHICUS) FROM THE CHALK POINT OIL SPILL, PATUXENT RIVER, MARYLAND1". International Oil Spill Conference Proceedings 2005, n. 1 (1 maggio 2005): 787–91. http://dx.doi.org/10.7901/2169-3358-2005-1-787.

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ABSTRACT Spill-associated mortality from the Chalk Point oil spill to muskrats (Ondatra zibethicus) was estimated using habitat and oiling extent data, muskrat population and home range estimates, local expert opinion, and hut count indices for three impacted creeks. Most of the 70 dead muskrats were collected from Swanson Creek. Muskrat density in this creek was estimated by local experts, and extrapolation from densities reported at a nearby wildlife refuge. Muskrat habitat acreage within Swanson Creek was determined using digitized aerial photography. Acreages of oiled marsh habitat for Swanson, Indian, and Trent Hall Creeks were estimated using spatial analysis. Oiling of muskrats likely occurred to those whose home ranges overlapped the spill area. Radius of a muskrat home range was reported to be 30 meters, and 30 meter buffers were circumscribed along borders of the oiled areas for these creeks. Exposure zone acreages were determined by summing the 30-meter buffers and oiled areas for Swanson, Indian, and Trent Hall Creeks, totaling 75.02, 19.55, and 9.12 acres, respectively. Muskrat population exposure within Swanson Creek was estimated by multiplying exposure zone acreage by muskrat density (4.2 per acre), totaling 315 individuals. Muskrat populations for Indian and Trent Hall Creeks were quantified using hut count indices and comparisons to the count index and population estimate for Swanson Creek. Muskrat exposures in Indian and Trent Hall Creeks were determined by multiplying estimated muskrat density by the exposure zone acreage for each creek. The exposed population was calculated to be 32 and 29 for Indian Creek and Trent Hall Creek, respectively. Assuming 100% mortality for muskrats potentially exposed to oiled marsh habitat, the total acute mortality in the spill area was estimated to be 376 individuals (i.e., 315 in Swanson Creek, 32 in Indian Creek, and 29 in Trent Hall Creek). Total muskrat years lost are calculated, and the strengths and uncertainties of this approach are discussed.

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3

Chen, Xu, Mingliang Zhang e Hengzhi Jiang. "Morphological Characteristics and Hydrological Connectivity Evaluation of Tidal Creeks in Coastal Wetlands". Land 11, n. 10 (1 ottobre 2022): 1707. http://dx.doi.org/10.3390/land11101707.

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Tidal creeks play a critical role in delivering water, suspended sediments, and nutrients to coastal wetlands, so it is important to understand the characteristics of the tidal creek system to guide the development and sustainable utilization of coastal wetlands. Using the coastal wetlands of the Liao River Estuary (LRE) as a study area, this study accurately divided the tidal flat based on the principle of tidal correction, extracted the linear features of tidal creeks using high-resolution remote sensing (RS) data, and then classified the tidal creeks on a tidal flat using the tidal creek ordering algorithm. Our study aimed to quantify the morphological characteristics of tidal creeks and qualitatively evaluate the parameters of the tidal creek network in the study area. The study results show obvious spatial heterogeneity in the order and the average length of tidal creeks in the coastal wetlands of the LRE. With the increase in the order of tidal creeks, the average length of tidal creeks increased exponentially and the number of tidal creeks decreased exponentially in the study area. The total density of tidal creeks was related to the beach surface elevation gradient, and the density and frequency of tidal creeks reduced substantially with an increase in the order of tidal creeks. The sinuosity ratio of tidal creeks declined sharply with a fall in the beach surface elevation gradient. The average bifurcation ratio of tidal creeks in the upper intertidal zone was higher than that in other zones, indicating that the tidal creeks in the upper intertidal zone were erratic. In addition, the hydrological connectivity of the tidal creek network in the upper intertidal zone and the development of the tidal creek system in the supratidal zone were the highest in the LRE. The study results help understand the spatial variations in tidal creek morphology under the influence of tidal hydrodynamics.

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4

Chow-Fraser, Patricia, Barb Crosbie, Douglas Bryant e Brian McCarry. "Potential Contribution of Nutrients and Polycyclic Aromatic Hydrocarbons from the Creeks of Cootes Paradise Marsh". Water Quality Research Journal 31, n. 3 (1 agosto 1996): 485–504. http://dx.doi.org/10.2166/wqrj.1996.028.

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Abstract During the summer of 1994, we compared the physical and nutrient characteristics of the three main tributaries of Cootes Paradise: Spencer, Chedoke and Borer’s creeks. On all sampling occasions, concentrations of CHL α and nutrients were always lowest in Borer’s Creek and highest in Chedoke Creek. There were generally 10-fold higher CHL α concentrations and 2 to 10 times higher levels of nitrogen and phosphorus in Chedoke Creek compared with Spencer Creek. Despite this, the light environment did not differ significantly between Spencer and Chedoke creeks because the low algal biomass in Spencer Creek was balanced by a relatively high loading of inorganic sediments from the watershed. Laboratory experiments indicated that sediments from Chedoke Creek released up to 10 µg/g of soluble phosphorus per gram (dry weight) of sediment, compared with only 2 µg/g from Spencer Creek. By contrast, sediment samples from Spencer Creek contained levels of polycyclic aromatic hydrocarbon that were as high as or higher than those from Chedoke Creek, and much higher than those found in Borer’s Creek. The distribution of normalized PAH concentrations suggests a common source of PAHs in all three tributaries, most likely automobile exhaust, since there were high concentrations of fluoranthene and pyrene, both of which are derivatives of engine combustion.

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5

Vo, Phuoc Luong Hong, e Phuc Tran Duy Le. "TIDAL ASYMMETRY IN MANGROVE CREEKS". Science and Technology Development Journal 14, n. 4 (30 dicembre 2011): 86–92. http://dx.doi.org/10.32508/stdj.v14i4.2030.

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A simple analytical model for flow in the creeks is formulated, built up and applied in the real conditions in Nang Hai creek, Can Gio mangrove Biosphere Reserve (Ho Chi Minh city).Observed data of current speed and water level in the creek in the year of 2005 were used to find the friction coefficients in the mangrove swamp and to apply in the model. Results from calculated modeling show obviously the tidal asymmetry in mangrove creek. The peaks of current speed at flood and ebb tides are not equal as the swamp is inundated. The friction coefficients have the great influence in the tidal asymmetry. The friction coefficient in the creek can change remarkably the current speed in the creek, inducing the changes of the current speed peaks. The friction coefficient in the swamp has much less influenced to the current speed in the creeks.

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6

Valiñas, Macarena, Eduardo M. Acha e Oscar Iribarne. "Habitat use and feeding habits of juvenile fishes in an infrequently flooded Atlantic saltmarsh". Marine and Freshwater Research 61, n. 10 (2010): 1154. http://dx.doi.org/10.1071/mf09109.

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In saltmarshes, marsh creeks provide an important corridor between the marsh and the subtidal habitat for fishes. We compare fish and prey in a Spartina densiflora marsh creek with a tidal flat in the SW Atlantic (Argentina) to evaluate the hypotheses that: (1) benthic prey abundance is higher in the marsh creek, and therefore the abundance of benthivorous fishes and predation pressure on benthos is higher in this area; and (2) marsh creeks act as refuge areas for fishes. Fish abundance and benthic prey availability were sampled over four seasons, and dietary composition of Odontesthes argentinensis and Micropogonias furnieri was assessed. Brevoortia aurea was more abundant in the marsh creek, Micropogonias furnieri showed the opposite pattern, and Odontesthes argentinensis and Ramnogaster arcuata did not dominate either habitat. As expected, smaller fishes were more abundant in the marsh creek. Food abundance was higher in the marsh creek but only M. furnieri consumed more prey in this area, while O. argentinensis consumed more in the tidal flat. Differences in prey accessibility and sediment features between areas could explain these results. This work highlights the importance of marsh creeks as refuge and/or feeding grounds for fishes in infrequently flooded saltmarshes.

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7

Gu, Bon-Ho, Seung-Buhm Woo, Jae-Il Kwon, Sung-Hwan Park e Nam-Hoon Kim. "Case Study of Contaminant Transport Using Lagrangian Particle Tracking Model in a Macro-Tidal Estuary". Water 16, n. 4 (19 febbraio 2024): 617. http://dx.doi.org/10.3390/w16040617.

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This study presents a comprehensive analysis of contaminant transport in estuarine environments, focusing on the impact of tidal creeks and flats. The research employs advanced hydrodynamic models with irregular grid systems and conducts a detailed residual current analysis to explore how these physical features influence the movement and dispersion of contaminants. The methodology involves simulating residual currents and Lagrangian particle trajectories in both ‘Creek’ and ‘No Creek’ cases, under varying tidal conditions. The results indicate that tidal creeks significantly affect particle retention and transport, with notable differences observed in the dispersion patterns between the two scenarios. The ‘Creek’ case demonstrates enhanced material retention along the creek pathways, while the ‘No Creek’ case shows broader dispersion, potentially leading to increased sedimentation in open sea areas. The discussion highlights the implications of these findings for sediment dynamics, contaminant transport, and estuarine ecology, emphasizing the role of tidal creeks in modulating flow and material transport. The research underlines the necessity of incorporating detailed environmental features in estuarine models for accurate contaminant transport prediction and effective estuarine management. This study contributes to a deeper understanding of estuarine hydrodynamics and offers valuable insights for environmental policy and management in coastal regions.

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Magolan, Jessica Lynn, e Joanne Nancie Halls. "A Multi-Decadal Investigation of Tidal Creek Wetland Changes, Water Level Rise, and Ghost Forests". Remote Sensing 12, n. 7 (3 aprile 2020): 1141. http://dx.doi.org/10.3390/rs12071141.

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Coastal wetlands play a vital role in protecting coastlines, which makes the loss of forested and emergent wetlands devastating for vulnerable coastal communities. Tidal creeks are relatively small hydrologic areas that feed into larger estuaries, are on the front lines of the interface between saltwater and freshwater ecosystems, and are potentially the first areas to experience changes in sea level. The goal of this study was to investigate wetland changes through time at two tidal creeks (Smith Creek and Town Creek) of the Cape Fear River estuary in southeastern North Carolina, USA, to determine if there is a spatial relationship between habitat change, physical geography characteristics, and the rate of wetland migration upstream. Historic aerial photography and recent satellite imagery were used to map land cover and compute change through time and were compared with derived physical geography metrics (sinuosity, creek width, floodplain width, floodplain elevation, and creek slope). The primary results were: (1) there was a net gain in emergent wetlands even accounting for the area of wetlands that became water, (2) wetlands have migrated upstream at an increasing rate through time, (3) land cover change was significantly different between the two creeks (P = 0.01) where 14% (67.5 ha) of Smith Creek and 18% (272.3 ha) of Town Creek transitioned from forest to emergent wetland, and (4) the transition from emergent wetland to water was significantly related to average change in creek width, floodplain elevation, and average water level. In conclusion, this research correlated habitat change with rising water level and identified similarities and differences between neighboring tidal creeks. Future research could apply the methodologies developed here to other coastal locations to further explore the relationships between tides, sea level, land cover change, and physical geography characteristics.

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9

Che, Celestine A., Jeremy W. Pike, William C. Bridges e Joseph D. Culin. "Impacts on Larval Populations of Ephemeroptera, Plecoptera, and Trichoptera in Areas Infested by Hemlock Woolly Adelgid (Hemiptera: Adelgidae) at the Southern Edge of the Range of Eastern Hemlock". Journal of Entomological Science 57, n. 2 (29 marzo 2022): 156–72. http://dx.doi.org/10.18474/jes21-30.

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Abstract Eastern hemlock, Tsuga canadensis (L.) Carriere, is an important component of riparian zones in Appalachian forests. Tree mortality caused by hemlock woolly adelgid, Adelges tsugae Annand (Hemiptera: Adelgidae) could impact aquatic macroinvertebrate populations. Our study examined larval populations of Ephemeroptera, Plecoptera, and Trichoptera occurring in the headwaters of two creeks in the Sumter National Forest (Oconee Co., SC). Larval populations were initially sampled in King Creek (2006) and Crane Creek (2007) in separate studies. When those studies were conducted, there was no noticeable decline in hemlock health along either creek. However, by 2009 hemlock mortality along both creeks was obvious, and the Ephemeroptera, Plecoptera, and Trichoptera community was resurveyed on both creeks. This is the first study comparing aquatic macroinvertebrate populations before and after A. tsugae infestation. Ephemeroptera, Plecoptera, and Trichoptera larvae were identified to genus, and analyzed at the functional feeding group level. In both creeks, collector filterers and scrapers were significantly more abundant in the initial survey than in 2009. Generic diversity within each creek was examined using the total Ephemeroptera, Plecoptera and Trichoptera community, and was based on the indices of: richness (D0), Shannon exponential (D1), and inverse Simpson (D2). The only diversity measure that differed significantly between the original survey and 2009 was the Shannon exponential index for Crane Creek which was significantly higher in 2009 than 2006

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10

Waweru, Beth Wangui, Charity Wangui Wanjohi, Agnes Wangui N. Muthumbi, Eric Ochieng Okuku e Nathan Ndegwa Gichuki. "Meiofauna as bioindicators of organic and inorganic pollution of estuarine sediments in Kenya". Western Indian Ocean Journal of Marine Science 23, n. 1 (31 maggio 2024): 69–80. http://dx.doi.org/10.4314/wiojms.v23i1.7.

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Meiofaunal density, diversity, and community assemblages were studied at the highly con- taminated Tudor Creek and the less contaminated Mida Creek in Kenya to assess their poten- tial as bioindicators of marine pollution. Sampling during the dry (January/February 2017) and wet (November/December 2017) seasons indicated a significantly greater total organic matter content at Mida (23.7 and 23.9 %) than at Tudor Creek (6.6 and 5.9 %) in the dry and wet seasons. Heavy metal concentrations were always greater at Tudor Creek. Meiofaunal densi- ties were greater at Mida (2729 and 2804 ind.10 cm-2) than Tudor Creek (612 and 183 ind.10 cm-2) during both seasons. Meiofauna at Mida Creek (10 and 7 taxa in the dry and wet seasons) were dominated by nematodes, copepods, and turbellarians. Meiofauna at Tudor Creek (8 and 6 taxa) were dominated by nematodes, turbellarians and ostracods. Meiofaunal diversity was greater at Tudor Creek, but dominance was highest at Mida Creek. Community dissimilarities between the two sites were shown in a Bray-Curtis cluster analysis. There is a high likelihood that heavy metals affect meiofauna density and diversity in the sediments of the two studied creeks in Kenya.

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Tesi sul tema "Creek"

1

Ward, Shannon Camlin. "Blood Creek". NCSU, 2009. http://www.lib.ncsu.edu/theses/available/etd-02252009-184954/.

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2

Haveman, Christopher D. Braund Kathryn E. Holland. "The removal of the Creek Indians from the Southeast, 1825-1838". Auburn, Ala, 2009. http://hdl.handle.net/10415/1878.

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Gray, Suzanne Fernandez. "To the Creek". UKnowledge, 2019. https://uknowledge.uky.edu/english_etds/88.

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“To the Creek” is a creative nonfiction work in which place and identity play integral roles. Following a series of family revelations, the narrator embarks on a rebuilding project both of herself and a 100-year-old corncrib, the only standing structure on a Kentucky farm she and her husband inherited a few years before. However, farm life isn’t a natural fit for a first generation Cuban American, so this work touches on identity as well. The corncrib’s new function as a retreat and writing space leads the writer to explore similar efforts by other writers to convert existing sheds into creative spaces, with particular emphasis on Virginia Woolf and Thomas Merton.

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Stoffle, Richard W., Vlack Kathleen A. Van e Fletcher Chmara-Huff. "Quitchupah Creek Ethnographic Study For The Proposed Quitchupah Creek Coal Haul Road". Bureau of Applied Research in Anthropology, 2004. http://hdl.handle.net/10150/293790.

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This study was designed to inform the third party Environmental Impact Statement (EIS) required for the Quitchupah Creek Road, UTU-57907, Fishlake National Forest and Bureau of Land Management, Richfield District, Sevier and Emery Counties, Utah. The road proposal involved upgrading a jeep trail located in Quitchupah Canyon. Modifications of this four-wheel drive dirt road would involve extensive environmental engineering, bridges culverts for side canyon intermittent streams and paving of approximately 9.2 miles. A team of ethnographers from the University of Arizona interviewed members of the Paiute Indian Tribe of Utah (PITU) to understand cultural meaning, traditional use, and potential impacts to Native American resources in the study area.

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Opheim, Mads. "CREEK and Description Logics". Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for datateknikk og informasjonsvitenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-26768.

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Creek is a system for diagnosis and problem solving. It makes heavily use of general knowledge, and is intended for open and weak theory domains. The system uses this general knowledge in combination with experiences from previous cases to solve new problems.We have implemented the core parts of Creek inside the Colibri studio framework, and shown that it is both possible and realistic to create a thorough Creek implementation. This has resulted in a system named Colibreek.In this implementation, we have replaced the knowledge representation in Creek, switching from the original frames to description logics. This has proven successful, and promising for further development.We have tested our system on the turbine sensor domain, and shown how our system can be used for condition monitoring on sensor-monitored equipment such as turbines. By doing this, we have also shown how the system can solve real problems people, companies and organisations have.

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Korenic, Robert J. "Development of Watershed Action Plans for the Mill Creek and Yellow Creek Watersheds". Youngstown State University / OhioLINK, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=ysu997986507.

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Chapman, Genesis. "Bottom Creek, Bent Mountain, VA". VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2163.

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The title of this thesis Bottom Creek, Bent Mountain, VA is the subject of my large ink drawings. Starting with the spring outside my window, this book describes the creeks as it flows across the mountain that I grew up on. My drawings document the experience of walking along the banks of Bottom Creek as it flows past farms fields and along the roadside. Described as a seemingly insignificant place, the creek is in fact it is one of the most basic, and important parts of this mountain’s landscape, because the creek’s natural process it is responsible for producing the landscape as we see it. Through drawing the water from direct observation, I find a deeper connection to the land and respect for its ever changing processes.

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Carter, Bryan. "Tidal Creek Equilibrium: Barataria Bay". ScholarWorks@UNO, 2017. http://scholarworks.uno.edu/td/2303.

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Louisiana’s wetlands are losing land in response to sea level changes, anthropogenic influences and natural marine processes. Historical satellite image analysis reveals that between 2005 and 2015, fifteen tidal creeks in Barataria Bay, Louisiana eroded at the rate of 1.80 m/yr (± 1.98 m), and the open water area behind these creeks enlarged at the rate of 530.00 m2/yr (± 204.80 m2). This research revealed that selected tidal creeks within the estuary have cross-sectional areas larger (2639% larger) than established ocean-inlet equilibrium models would predict. This work suggests that tidal prism to tidal creek cross-sectional area relationships in Barataria Bay are most strongly shaped by creek exposure to waves and secondarily by tide range and currents. A trend of increased inlet erosion rates due to large fetch distances is evident, but impacts from storm driven subtidal variations also play an important role.

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Hawkins, Philip C. "Creek Schism: Seminole Genesis Revisited". [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0002851.

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Overby, Steven T., e Daniel G. Neary. "Travertine Geomorphology of Fossil Creek". Arizona-Nevada Academy of Science, 1996. http://hdl.handle.net/10150/296999.

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Libri sul tema "Creek"

1

United States. Soil Conservation Service. Flood plain management study, Colorado River tributaries: Porcupine Creek, Beaver Creek, Mamm Creek, Dry Hollow Creek, Divide Creek, Garfield Creek, Alkali Creek, South Canyon Creek, Canyon Creek, Elk Creek. Denver: The Service, 1986.

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2

Creek. Edina, Minnesota: ABDO Publishing Company, 2015.

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3

Hubartt, Dennis. Ward Creek steelhead creel survey, Ketchikan, Alaska, 1988. Juneau, Alaska: Alaska Dept. of Fish and Game, Division of Sport Fish, 1989.

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Illinois. Department of Conservation. Franklin Creek. Springfield, Ill: Illinois Dept. of Conservation, Division of Land Management, 1990.

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Acuna, Sylvia G. Queen Creek. Charleston, South Carolina: Arcadia Publishing, 2013.

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Crooked Creek. Leicester: Thorpe, 2015.

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7

Kurt, Thornton, a cura di. Battle Creek. Charleston, SC: Arcadia Pub., 2009.

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Warbonnet Creek. London: Robert Hale, 2006.

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Miller, Linda Lael. Creed in Stone Creek. Harlequin Enterprises, Limited, 2011.

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Miller, Linda Lael. Creed in Stone Creek. Harlequin Enterprises ULC, 2022.

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Capitoli di libri sul tema "Creek"

1

Dewdney, A. K. "Hungry Creek". In Hungry Hollow, 160–68. New York, NY: Springer New York, 1998. http://dx.doi.org/10.1007/978-1-4612-2220-0_21.

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Gooch, Jan W. "Secondary Creek". In Encyclopedic Dictionary of Polymers, 651. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_10406.

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Horner, Jack, e James Gorman. "Hell Creek". In Evolution rückwärts, 19–64. Heidelberg: Spektrum Akademischer Verlag, 2010. http://dx.doi.org/10.1007/978-3-8274-2442-6_2.

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"Mangroves as Fish Habitat". In Mangroves as Fish Habitat, a cura di Karen J. Murchie, Sascha Clark Danylchuk, Andy J. Danylchuk e Steven J. Cooke. American Fisheries Society, 2015. http://dx.doi.org/10.47886/9781934874424.ch6.

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<em>Abstract</em>.—Three adjacent tidal creek systems (Page, Kemps, and Broad creeks) on Cape Eleuthera, The Bahamas were studied to quantify the variation in fish community structure and habitat characteristics over small (<5 km) spatial scales. Snorkeling transects were used to census the fish community on a summer new moon during slack high tide and involved the simultaneous assessment of each creek and each zone within the creek (i.e., mouth, middle, and upper) replicated over three consecutive days. The simultaneous assessment (involving large teams) was done to enable direct comparison without spatial sampling being confounded by time. Habitat assessments included measurements of water quality parameters, sediment sampling, and vegetation surveys. Despite their close proximity, creeks differed in both fish community structure and habitat characteristics. Broad Creek had the greatest fish species richness (<em>n </em>= 15), followed by Kemps Creek (<em>n </em>= 14) and Page Creek (<em>n </em>= 10). Mangrove habitats had significantly greater fish species diversity in Broad Creek while sea grass habitats resulted in higher species richness in Page Creek, relative to other habitat types. Mangrove and algal plain habitats had the highest fish species diversity in Kemps Creek. Within creeks, fish abundance was dependent on zonation, with the largest number of fish being found in creek mouths compared to upper sections. Water quality parameters (i.e., temperature, dissolved oxygen, and salinity) differed among the creeks, presumably reflecting creek morphology. Out of the 10 different species of vegetation observed, 60% were found in all tidal creeks. Coarse sand was the predominant particle size for all creeks, with variation in the second most abundant particle size between Page Creek and the others. This study reveals the great heterogeneity of tidal creek fish community and habitat characteristics and illustrates that conservation and management strategies along with monitoring programs must recognize the variation that can occur among and within coastal creeks over relatively small spatial scales.

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"Mangroves as Fish Habitat". In Mangroves as Fish Habitat, a cura di Karen J. Murchie, Sascha Clark Danylchuk, Andy J. Danylchuk e Steven J. Cooke. American Fisheries Society, 2015. http://dx.doi.org/10.47886/9781934874424.ch6.

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<em>Abstract</em>.—Three adjacent tidal creek systems (Page, Kemps, and Broad creeks) on Cape Eleuthera, The Bahamas were studied to quantify the variation in fish community structure and habitat characteristics over small (<5 km) spatial scales. Snorkeling transects were used to census the fish community on a summer new moon during slack high tide and involved the simultaneous assessment of each creek and each zone within the creek (i.e., mouth, middle, and upper) replicated over three consecutive days. The simultaneous assessment (involving large teams) was done to enable direct comparison without spatial sampling being confounded by time. Habitat assessments included measurements of water quality parameters, sediment sampling, and vegetation surveys. Despite their close proximity, creeks differed in both fish community structure and habitat characteristics. Broad Creek had the greatest fish species richness (<em>n </em>= 15), followed by Kemps Creek (<em>n </em>= 14) and Page Creek (<em>n </em>= 10). Mangrove habitats had significantly greater fish species diversity in Broad Creek while sea grass habitats resulted in higher species richness in Page Creek, relative to other habitat types. Mangrove and algal plain habitats had the highest fish species diversity in Kemps Creek. Within creeks, fish abundance was dependent on zonation, with the largest number of fish being found in creek mouths compared to upper sections. Water quality parameters (i.e., temperature, dissolved oxygen, and salinity) differed among the creeks, presumably reflecting creek morphology. Out of the 10 different species of vegetation observed, 60% were found in all tidal creeks. Coarse sand was the predominant particle size for all creeks, with variation in the second most abundant particle size between Page Creek and the others. This study reveals the great heterogeneity of tidal creek fish community and habitat characteristics and illustrates that conservation and management strategies along with monitoring programs must recognize the variation that can occur among and within coastal creeks over relatively small spatial scales.

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"creek". In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 304. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_35299.

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"creek". In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 304. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_35300.

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"creek". In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 304. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_35301.

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"creek". In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 304. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_35302.

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"creek". In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 304. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_35303.

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Atti di convegni sul tema "Creek"

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Kim, Sunyoung, Christine Robson, Thomas Zimmerman, Jeffrey Pierce e Eben M. Haber. "Creek watch". In the 2011 annual conference. New York, New York, USA: ACM Press, 2011. http://dx.doi.org/10.1145/1978942.1979251.

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Moore, Diane E., e Robert J. McLaughlin. "SERPENTINITE AND CREEP ALONG THE RODGERS CREEK FAULT, NORTHERN CALIFORNIA". In 116th Annual GSA Cordilleran Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020cd-346167.

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Moore, Diane, e Robert J. McLaughlin. "SERPENTINITE AND CREEP ALONG THE RODGERS CREEK FAULT, NORTHERN CALIFORNIA". In GSA Connects 2021 in Portland, Oregon. Geological Society of America, 2021. http://dx.doi.org/10.1130/abs/2021am-363779.

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Heyer, Lance, John Beckos e Robin Dornfest. "Fossil Creek Pedestrian Tunnel". In Rocky Mountain Geo-Conference 2018. Reston, VA: American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784481936.016.

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Brady, Corinne, Faldo Jatmoko, Ban Mansoor, Daniel Castaneda, Heather Kirkvold e Bradley Striebig. "Bridge over Mossy Creek". In 2019 Systems and Information Engineering Design Symposium (SIEDS). IEEE, 2019. http://dx.doi.org/10.1109/sieds.2019.8735591.

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Harding, Scott D. "Fox Creek Mitigation Bank". In Wetlands Engineering and River Restoration Conference 2001. Reston, VA: American Society of Civil Engineers, 2001. http://dx.doi.org/10.1061/40581(2001)25.

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Davies, Jeffrey W. "Kansas City, MO Overflow Control Program: Line Creek/Rock Creek Sanitary Sewer Study". In World Environmental and Water Resources Congress 2009. Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41036(342)451.

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Schafer, Bruce W., e Stan Wahlmeier. "Wolf Creek Feedwater Heater Repair". In 2002 International Joint Power Generation Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/ijpgc2002-26150.

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Since 1990, an increasing number of the 304 SST feedwater heater tubes in the number 1 and 2 feedwater heaters (six heaters total) at the Wolf Creek Nuclear Power Plant have experienced failure due to fretting wear within the drain cooler region. Tube damage was due to thin end plate design resulting in tube wear at the end plate and support plate locations. Despite performing extensive eddy current inspections and preventative plugging on the heaters, the damage mechanism is powerful enough that tube leaks were continuing to occur while at power, resulting in the forced shutdown of a string of heaters for plugging. As an option to feedwater heater replacement, a method of reducing the tube-to-end plate gap, by expanding the tube into very close contact with the end plate, and sleeving tubes with wear indications was evaluated. Based on an evaluation of outage schedule time and cost, it was decided that the option of repairing the feedwater heaters, rather than replacing them, would be pursued. During Wolf Creek’s September 2000 refueling outage, Framatome ANP performed feedwater heater tube plug removal, tube expansions at the end plate, and sleeving. All work on-site was performed within the outage scheduling constraints.

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Johnson, Ted, Wendy Katagi, George Sutherland e Brian Murphy. "Trabuco Creek Fish Passage Projects". In World Environmental And Water Resources Congress 2012. Reston, VA: American Society of Civil Engineers, 2012. http://dx.doi.org/10.1061/9780784412312.168.

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Wilding, Hailey A., Kenny Yue, Mark Lovell e Julie B. Willis. "PORCUPINE CREEK LANDSLIDE, ALPINE, WY". In 72nd Annual GSA Rocky Mountain Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020rm-346746.

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Rapporti di organizzazioni sul tema "Creek"

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Perkins, Dustin. Invasive exotic plant monitoring in Capitol Reef National Park: 2020 and 2021 field seasons. National Park Service, agosto 2022. http://dx.doi.org/10.36967/2294094.

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Invasive exotic plant (IEP) species are a significant threat to natural ecosystem integrity and biodiversity. Controlling them is a high priority for the National Park Service. The Northern Colorado Plateau Network (NCPN) selected the early detection of IEPs as one of 11 moni-toring protocols to be implemented as part of its long-term monitoring program. From June 5 to July 29, 2020, and May 30 to June 2, 2021, network staff conducted surveys for priority IEP species along the Oak Creek, Pleasant Creek, and State Route 24 monitoring routes at Capitol Reef National Park. We detected 834 patches of 11 priority IEP species along 67.9 kilometers (42.2 miles) of three monitoring routes. There were more patches of tamarisk along State Route 24, and a higher percentage of large patches, than in previous years. This indicates that previously identified IEP patches have expanded and grown. Field bindweed (Convolvulus arvensis) and Russian olive (Elaeagnus angustifolia) along State Route 24 have both increased in prevalence since monitoring began. Tamarisk (Tamarix sp.) was the most prevalent prior-ity IEP species on all three routes. On Oak and Pleasant creeks, there were fewer than three patches of all other IEPs. On State Route 24, there were 30 or more patches of Russian olive, quackgrass (Elymus repens), field bindweed, and blue mustard (Chorispora tenella). IEP prior-ity species were found on 71%, 47%, and 62% of transects along Oak Creek, Pleasant Creek, and State Route 24, respectively. Yellow sweet-clover (Melilotus officinalis) was the most fre-quently observed IEP on Oak Creek and Pleasant Creek. Percent cover was highest for yellow sweet-clover, Russian thistle (Salsola sp.), and tamarisk on Oak Creek, Pleasant Creek, and State Route 24, respectively. The NCPN plans to return to Capitol Reef in 2023 to continue the fourth rotation of invasive plant monitoring.

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Jost, Robert, Taylor Kenyon e Scott Beason. Tahoma Creek Bridge focused condition assessment. National Park Service, 2024. http://dx.doi.org/10.36967/2303321.

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The Tahoma Creek Bridge on the southwest side of Mount Rainier is an essential crossing for year-round vehicular access to Mount Rainier National Park (MORA). This site is also exposed to significant hydrologic variability, which the current structure was not designed to withstand. Locally enhanced vertical increases to the riverbed elevation, known as aggradation, threaten the structure?s long-term viability. The purpose of this report is to (1) clarify the details of channel maintenance operations related to the bridge; (2) synthesize the natural and human influences of sediment deposition in the lower watershed; and (3) discuss the potential solutions for sustainable bridge maintenance. Information was collected through prior structural inspection reports, raw hydrologic data stored by the National Park Service, and both published and unpublished reports focused on Tahoma Creek. It was found that the height and width of the Tahoma Creek Bridge are severely underfit for relatively common flooding events on Tahoma Creek. Additionally, dredging and sediment storage practices employed to maintain the bridge are ineffective and even enhance aggradation in nominal flow conditions. Further research in the Tahoma Creek Watershed suggests the river is generally efficient at exporting produced sediments and maintains a relatively stable vertical profile in its lower reaches, where the bridge is located. The singular variation from this stable vertical trend at the bridge site suggests locally enhanced aggradation at the bridge is entirely due to the presence of the bridge itself and the channel modification actions taken to support the structure. All told, neither the overall size of the Tahoma Creek Bridge nor the channel modification actions taken to maintain the crossing, are viable for long-term access into MORA. With no changes to the existing bridge profile, the status-quo for operations to manage the Tahoma Creek Bridge will eventually fail to maintain access.

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Kondolf, G. Mathias, e Shanna Leigh Atherton. Tassajara Creek Restoration. Landscape Architecture Foundation, 2013. http://dx.doi.org/10.31353/cs0530.

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Brisbin, D., V. Kelly e R. Cook. Kidd Creek Mine. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/132299.

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Evenchick, C. A. Geology, Tahtsedle Creek. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2004. http://dx.doi.org/10.4095/215499.

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McMechan, M. E. Mount Sir Alexander, Walker Creek, Cariboo Land Creek, British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/130031.

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Tate, Jr, e Charles H. Muddy Creek Grade Control Structures Muddy Creek, Mississippi and Tennessee. Fort Belvoir, VA: Defense Technical Information Center, maggio 1988. http://dx.doi.org/10.21236/ada196210.

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Kszos, L. A., M. J. Peterson, Ryon e J. G. Smith. Big Bayou Creek and Little Bayou Creek Watershed Monitoring Program. Office of Scientific and Technical Information (OSTI), marzo 1999. http://dx.doi.org/10.2172/5707.

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Weissinger, Rebecca. Trends in water quality at Bryce Canyon National Park, water years 2006–2021. A cura di Alice Wondrak Biel. National Park Service, novembre 2022. http://dx.doi.org/10.36967/2294946.

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The National Park Service collects water-quality samples on a rotating basis at three fixed water-quality stations in Bryce Canyon National Park (NP): Sheep Creek, Yellow Creek, and Mossy Cave Spring. Data collection began at Sheep Creek and Yellow Creek in November 2005 and at Mossy Cave in July 2008. Data on in-situ parameters, fecal-coliform samples, major ions, and nutrients are collected monthly, while trace elements are sampled quarterly. This report analyzes data from the beginning of the period of record for each station through water year 2021 to test for trends over time. Concentrations are also compared to relevant water-quality standards for the State of Utah. Overall, water quality at the park’s monitoring stations continues to be excellent, and park managers have been successful in their goal of maintaining these systems in unimpaired condition. Infrequent but continued Escherichia coli exceedances from trespass livestock at Sheep and Yellow creeks support the need for regular fence maintenance along the park boundary. High-quality conditions may qualify all three sites as Category 1 waters, the highest level of anti-degradation protection provided by the State of Utah. Minimum and maximum air temperatures at the park have increased, while precipitation remains highly variable. Increasing air temperatures have led to increasing water temperatures in Sheep and Yellow creeks. Sheep Creek also had a decrease in flow across several quantiles from 2006 to 2021, while higher flows decreased at Yellow Creek in the same period. Surface flows in these two creeks are likely to be increasingly affected by higher evapotranspiration due to warming air temperatures and possibly decreasing snowmelt runoff as the climate changes. The influx of ancient groundwater in both creek drainages helps sustain base flows at the sites. Mossy Cave Spring, which is sampled close to the spring emergence point, showed less of a climate signal than Sheep and Yellow creeks. In our record, the spring shows a modest increase in discharge, including higher flows at higher air temperatures. An uptick in visitation to Water Canyon and the Mossy Cave Trail has so far not been reflected by changes in water quality. There are additional statistical trends in water-quality parameters at all three sites. However, most of these trends are quite small and are likely ecologically negligible. Some statistical trends may be the result of instrument changes and improvements in quality assurance and quality control over time in both the field sampling effort and the laboratory analyses. Long-term monitoring of water-quality stations at Bryce Canyon NP suggests relatively stable aquatic systems that benefit from protection within the park. To maintain these unimpaired conditions into the future, park managers could consider: Regular fence checks and maintenance along active grazing allotments at the park boundary to protect riparian areas and aquatic systems from trespass livestock. Developing a springs-monitoring program to track changes in springflow at spring emergences to better understand bedrock-aquifer water supplies. These data would also help quantify springflow for use in water-rights hearings. Supporting hydrogeologic investigations to map the extent and flow paths of groundwater aquifers. Working with the State of Utah to develop groundwater-protection zones to protect groundwater aquifers from developments that would affect springs in the park. Prioritizing watershed management with proactive fire risk-reduction practices. Explicitly including watershed protection as a goal in plans for fire management and suppression. Using additional data and analyses to better understand the drivers of trends in water quality and their ecological significance. These could include higher-frequency data to better understand relationships between groundwater, precipitation, and surface flows at the sites. These could also include watershed metrics...

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Harun, N. T., e M. D. Hendricks. Jarvis Creek coal report. Alaska Division of Geological & Geophysical Surveys, 2018. http://dx.doi.org/10.14509/30064.

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