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Showing 1 to 20 of 95 for “"Impoundment"”.
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Mark Scott Wetland Impoundment Near Polson, MT: Design Proposal
… is at 2998 feet above sea level </p><p>•The impoundment will be approximately nine acres and have a drainage basin area of 1,200 acres. </p><p>•The Embankment will pass the 100-year-24 hour storm, and maintenance to the structure and embankment will be minimal. </p><p>•The control structure …
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Hydrologic Design of a Wetland Impoundment: Kingsbury County, SD.
<p>An embankment is proposed to create a wetland, as classified by the Army Corps of Engineers (1987), in southeastern South Dakota as part of a geological engineering senior design project. The wetland will lie within the Prairie Pothole Region of the Upper Midwest. It is within this region that …
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The effects of seasonal change, impoundment, and stratification on trihalomethane precursors
… its watershed (late winter to late summer), the impoundment of Broad Run, and the stratification of Lake Manassas on trihalomethane (THM)-precursors in Broad Run, upstream and downstream of the reservoir, and in Lake Manassas. An additional objective was to determine the molecular-size …
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Advanced Largemouth Bass Production and Stock Contribution to Small South Dakota Impoundment Fisheries
… structure and growth rates of panfish in small impoundments by reducing the number of small individuals through predation. Largemouth bass are also a highly sought‐after sport fish in South Dakota, ranking highly in surveys of anglers and competitive fishing events. Nearly one‐third of South …
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Evaluation of activated carbon processes for removing trihalomethane precursors from a surface water impoundment
A pilot plant study was conducted in Newport News, Virginia to investigate the effectiveness of powdered activated carbon [PAC] and granular activated carbon [GAC], with and without preoxidation, for reducing trihalomethane [THM] precursor concentrations in Harwood's Mill Reservoir water. …
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Observations and implications of sediment-water interactions in the Niagara impoundment of southwest Virginia
… mixing. The deposited sediments of Niagara Impoundment showed a capacity to redistribute the impoundment influent nutrient load, causing an enhance~ ment of the quantities released during the summer months, thus magnifying the impact on the waters of Smith Mountain Lake. The maintenance of …
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Food Habits of Black Crappies, White Crappies, Yellow Perch and White Suckers in a Small Impoundment in Northeastern South Dakota
<p>Crustaceans, aquatic insects and fish were the most important food items found in stomach samples. Black crappies depended on zooplankton and aquatic insects as their major food source as they occurred in all samples and were major food items in 70 percent and 40 percent respectively. Insects, …
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A pre-impoundment study of the biological diversity of the benthic macro-invertebrate fauna of the Sabie-Sand River system
… initiated within this programme was a pre-impoundment study of the Sabie River, including its main tributary, the Sand River, which together are referred to as the Sabie-Sand River system.
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Ecological Management Strategies for Impounded Harbours
… and sediment quality changes arising from the impoundment of Sutton Harbour, Plymouth (UK). Spore tracer studies revealed that 95 % water renewal times increased from 45 h to 72 h after impoundment. Semi-diurnal (tidal) salinity variations of circa 5 x10ˉ³ were observed, revealing a mechanism …
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The effect of regulation by two impoundments on an acid, blackwater, Cape mountain stream
… stream continuum. The SOC proposes that a major impoundment at any position on a river system will cause a longitudinal shift in a given parameter (physical or biological) which will cause a discontinuity in the stream continuum. A certain distance is then required for the stream to return to its …
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Comparative resource use by two species of black bass in riverine and impounded sections of the New River, Virginia
… performance of both species in both river and impoundment, which implied that competitive pressures were not intense. Diet analyses indicated fairly high overlap in prey types consumed. High fitness combined with considerable diet overlap suggested that food availability was adequate, and that …
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Reservoir compensation releases and the ecology of the River Derwent, Northumberland.
… the channel to be altered. The impact of channel impoundment on a small, upland UK river, has been assessed and methods for mitigation of ecological impacts explored. The method utilised a unique macroinvertebrate data set for pre- and post-impoundment periods to quantify the impact of Derwent …
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Analysis of the impact of flathead catfish predation on the abundance of four centrarchid species
… in Byllesby Reservoir, a 98.6 ha hydropower impoundment in southwestern Virginia is the flathead catfish Pylodictis olivaris. The most numerically abundant fish in the reservoir are centrarchids, specifically bluegill Lepomis macrochirus, redbreast sunfish L. auritus, smallmouth bass …
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Using GIS and Land Use Data to Select Candidate Reference Sites for Stream Bioassessment
… land use data sets. These included road and impoundment data from DLGs and Multi-Resolution Land use Consortium data. Land use impairment was measured as percentages of forest, urban, pasture, row crops, and barren area for both the entire catchment and for 10, 40, and 130-m riparian buffers, …
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Geoprocessing Approaches to Delineate Impoundments and Characterize Subcatchments within Kansas Reservoir Drainages
… by having some of the highest densities of small impoundments in the United States. Previous studies have highlighted the potential of impoundments to act as significant sinks for sediment. However, their significance within Kansas reservoir drainages and potential service in mitigating downstream …
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A Dam Conundrum: The Role of Impoundments in Stream Flow Alteration
… has been difficult to assess how these smaller impoundments impact rivers. This study combined rainfall runoff data from the Chesapeake Bay Model with the unique routing framework of VA Hydro to create a simplistic hydrologic model capable of analyzing impoundment-induced flow alteration. Using …
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Landsat : water quality surveillance of Roodeplaat Dam
… concerning the quality of South African impoundments, prompted a study into the relationship between Landsat reflectance data and chlorophyll ~ and turbidity in Roodeplaat Dam. Surface and integrated chlorophyll a as well as surface and integrated turbidity were collected simultaneously …
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The macrobenthos of a new reservoir, Lake Anna, Louisa County, Virginia
… was studied for the first three years after impoundment, 1972-1975. Prior to this, extensive macrobenthic collections had been made in the river destined for impoundment, the North Anna River. The biota of this river had been seriously affected by acid mine drainage for over 100 years. …
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