Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"flow alteration"”.
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A Dam Conundrum: The Role of Impoundments in Stream Flow Alteration
… Due to limited data regarding their size and flow, it 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 …
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Ecohydrologic Indicators of Low-flow Habitat Availability in Eleven Virginia Rivers
… scenarios on instream habitat is Instream Flow Incremental Methodology (IFIM). The primary outputs of IFIM studies are: 1) habitat rating curves that relate habitat availability to streamflow for every species, lifestage, or recreational use modelled; and 2) habitat time series under …
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Hydropeaking in Alpine rivers: an ecosystem services approach
… of these ecosystem services depend on the river flow regime, which has been deeply modified by human structures and activities. These alterations have a direct influence on biodiversity, natural habitat and on the supply of river ecosystem services. The release of water from storage hydropower …
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Plant Community Invasibility in Riparian Landscapes: Role of Disturbance, Geomorphology, and Life History Traits
… this survey I addressed relationships between flow regime, climatic factors, and changes in flow regime with dominance of native and non-native woody species. Chapter four provides seven principles for riparian restoration for restoration practitioners. This chapter is based on a comprehensive …
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Effects of prey distribution on resource defense, foraging behavior, and growth in stream-dwelling Arctic char (Salvelinus alpinus)
… for one month, were subjected to upstream flow manipulations that yielded invertebrate drift either evenly distributed (dispersed) or unevenly distributed (clumped) in space. Observers recorded repeated individual estimates of activity, spatial location, aggression, and foraging behavior. …
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Reduction of convective heat transfer from reacting flows by application of electric fields
… was applied in a direction perpendicular to the flow. Heat transfer amelioration was quantified using records of temperature versus downstream distance from the stabilizer acquired for the external surface of the heatloaded electrode which was exposed to the ambient environment. In addition, …
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Contribuições ao Estudo Comparativo do Fibrinóide em Placentas Humanas, de Gestações Normais e com Pré-eclâmpsia
… these results are a consequence of the vascular alterations proper to pre-eclampsia, such as blood flow alteration, adaptation of the spiral arterioles, generalized arteriolar spasm, hyperplasia of the muscular layer of the arterioles in the villous trunks, among others.
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Providing a Restoration Framework for Regulated Rivers
… scientific literature, restoring natural stream flows in disturbed rivers is dependent upon developing quantitative, transferable stream flow-ecology relationships. The purpose of my dissertation was to apply a framework to regulated and unregulated streams within an eight-state region of the …
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Ecologically-focused calibration of hydrological models for environmental flow applications
Hydrologic alteration resulting from watershed urbanization is a common cause of aquatic ecosystem degradation. Developing environmental flow criteria for managing the effects of urbanization and other human influences requires quantitative flow-ecology relationships that link biological responses …
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Environmental Flow Determination in Headwater Catchments of Luvuvhu River in Limpopo Province, South Africa
… legislation officially integrates ecological flow allocation within its legal framework, yet implementation in data-scarce, ecologically sensitive headwaters remains uneven and/or underdeveloped. This study addresses the absence of defensible environmental flow requirements (EFRs) in the upper …
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Initial response of riparian vegetation to dam removal on the Elwha River, Washington
… change, development, invasive species, and flow alteration by dams. Vegetation in riparian zones can be altered by the damming of rivers that disrupts natural fluvial processes that change the flow regime, trap and reduce sediment transport downstream, and limit the dispersal of seeds in the …