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Showing 1 to 20 of 97 for “"impoundments"”.
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Progressive failure of slopes in lined waste impoundments
The failure of the Kettleman Hills landfill focused attention on the uncertainties associated with the use of limit equilibrium analyses for evaluation of the stability of slopes in which failure occurs along displacement-softening interfaces. Sliding on such interfaces can occur in a progressive …
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Productivity and Trophic Interactions in the Missouri River Impoundments
… of fisheries assessment in Missouri River impoundments. In South Dakota, annual variation in fish growth and abundance is used to monitor changes in fish populations and develop strategies (i.e. regulations) for managing recreational fishes. Although variation in fish abundance provides …
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Fish Populations of Two Small Impoundments in Northeastern South Dakota
<p>Thirteen species and large standing crops of fish were found in Blue Cloud Abbey Pond and Labolt Pond, South Dakota. Adult population was estimated to be 5184 fish in Abbey Pond and 5016 in Labolt Pond. Composition of the populations differed. Black crappies were most numerous in Abbey Pond; …
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An Assessment of Northern Pike Populations in Small South Dakota Impoundments
… were studied in three small South Dakota impoundments to determine predator-prey relationships. Densities (number of fish ≥ stock length ha-1) of northern pike within the three ponds ranged from 6 to 20 in 1994 and 10 to 13 in 1995. Density of northern pike was significantly higher …
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Bluegill Reproductive Biology and Population Dynamics in Four South Dakota Impoundments
… spawning periodicity in eastern South Dakota impoundments. Thus, the objectives of this study were to 1) determine the best aging structure for eastern South Dakota bluegill populations, 2) relate bluegill recruitment patterns to abiotic (i.e., climatic) factors, and 3) assess the extent and …
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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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Relation of Habitat to Fish Community Characteristics in Small South Dakota Impoundments
… and communities in small South Dakota impoundments has not been extensively researched. Most of the research on small South Dakota impoundments has focused on fish community structure and predator/prey relationships. Previous research revealed that largemouth bass Micropterus salmoides …
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Growth and Survival of Largemouth Bass in Newly Stocked South Dakota Impoundments
The present study was designed to evaluate the effect of five different stocking combinations and differences in climatic and morphological conditions within South Dakota on initial growth and survival of the largemouth bass (Micropertus salmoides). Forage species stocked with bass included gold …
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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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Influence of Saugeye on Black Crappie Populations in Two Northeastern South Dakota Impoundments
Saugeyes (purposeful hybrid between walleye Stizostedion vitreum and sauger S. canadense) were introduced into Lakes Richmond and Mina in Brown County, South Dakota. The objectives of this study were to 1) determine relative survival of advanced fingerling saugeyes stocked into Lakes Richmond and …
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Utility of Walleyes and Saugeyes as Secondary Predators in Small South Dakota Impoundments
… stocked at equal densities into five small impoundments in 1997, 1988, and 1999 to evaluate relative survival, growth and their ability to restructure existing panfish communities. Prior to stocking, fish were differentially marked on the right or left side with freeze brands or with 700 ppm …
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Assessment of White Bass Populations in Missouri River Impoundments Located in South Dakota
. White bass Morone chrysops compose a substantial portion of the total harvest of sport fishes in Lakes Oahe, Sharpe, Francis Case, and Lewis and Clark, but little is known about their population dynamics. Age-0 white bass catch per unit effort (CPUE) in standardized seine samples from 1983 to …
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Effects of Impoundments on the Community Assemblage and Gene Flow of Stream Crayfishes
Dams and their impoundments block movement of stream organism and change stream physiochemical properties, which subsequently changes biological assemblages and creates barriers to gene flow. While changes in species assemblages and gene flow have been assessed for numerous impoundments and stream …
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The effect of regulation by two impoundments on an acid, blackwater, Cape mountain stream
… of the annual temperature range below both impoundments; and seasonal shifts in alkalinity below Arieskraal. At least partial recovery was noted in all cases, but in some instances, recovery was incomplete to the estuary.
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Relative Survival and Growth of Walleye and Saugeye Fingerlings Stocked in South Dakota Small Impoundments
… stocked at equal densities into five small impoundments in 1997 and 1998 to evaluate relative survival and growth. Prior to stocking, fish were differentially marked with 7 0 0 ppm oxytetracycline hydrochloride (OTC) to allow accurate identification of each fish as a walleye (fry mark) or a …
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Nutritional Value and Management of Waterfowl and Shorebird Foods in Atlantic Coastal Moist-Soil Impoundments
… and shorebirds, contains numerous moist-soil impoundments that are managed for waterbirds. Positive relationships between nonbreeding body condition and subsequent survival and reproduction have been documented for waterfowl, yet few evaluations of habitat management consider nutritional value …
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Structure and Dynamics of Largemouth Bass Populations in Eastern South Dakota Glacial Lakes and Large Impoundments
… six glacial lakes and three large (i.e.,> 60 ha) impoundments in eastern South Dakota to determine population structure (relative abundance, size structure, body condition, and age structure) and dynamics (recruitment, growth, and mortality). Most lakes exhibited relatively low abundance; mean …
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Food Habits of Walleye and Saugeye When Stocked as Secondary Predators into Small South Dakota Impoundments
… glacial lake and three South Dakota small impoundments. The food habits study of sympatric largemouth bass and walleye populations was conducted in 1998 at Enemy Swim and Byre lakes South Dakota, where South Dakota Game, Fish and Parks (SDGFP) personnel had previously established the percid …
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Influence of Food Web Structure and Environmental Conditions on Walleye Stocking Success in Two South Dakota Impoundments
Demand for Walleye Sander vitreus throughout North America has resulted in increased stocking efforts and management of Walleye populations. Despite annual stockings, Walleye abundance in Mina Lake, South Dakota has remained low. Previous research at Mina Lake has shown increased trophic state, …
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Changes in the invertebrate populations, fish populations, and water chemistry of a small stream above and below two impoundments
The major impacts associated with the ponds appeared to be an alteration of energy dynamics. The alterations were seasonally dependent, and may have resulted from interception of larger particle organic matter being transported downstream and its replacement by finer organic matter. The alterations …
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