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 16 of 16 for “"Phosphorus-loading"”.
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Load reduction and invasive mussel effects on eutrophication dynamics in Saginaw Bay, Lake Huron
<p>Phosphorus load reduction and dreissenid invasion are the two most important factors that influence europhication dynamics in the Great Lakes. The 1978 amendments to the Great Lakes Water Quality Agreement (GLWQA) between the United States and Canada established target phosphorus loads for the …
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Algal Succession and Nutrient Dynamics in Elephant Butte Reservoir
… to large algal blooms. This study examined the phosphorus loading into the reservoir to see if it could sustain the observed algal growth. Data showed that the amount of bioavailable phosphorus was more than enough to support large blooms. This study also was an initial attempt to model multiple …
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Modeling and analysis of phosphorus reduction by rain gardens and other BMPs in stormwater runoff from small urban developments
… The P8 Urban Catchment Model was chosen to model phosphorus concentrations in stormwater runoff before and after the implementation of LID. The results were then assessed to determine whether or not these technologies significantly improve the runoff water quality. In this thesis, the analysis is …
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Hypolimnetic Oxygenation Mitigates the Effects of Nutrient Loading on Water Quality in a Eutrophic Reservoir
… and nutrients from the sediments, i.e., internal loading, while storms can increase external nutrient loading to a waterbody. One potential solution for combating hypoxia is to use side stream supersaturation (SSS), a novel form of hypolimnetic oxygenation. First, in Chapter 1, I tested the …
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Sediment Phosphorus Cycling in a Managed System Irondequoit Bay, N.Y.
The current status of internal phosphorus loading was evaluated in Irondequoit Bay, NY, an embayment of Lake Ontario. Sediment core incubation experiments and phosphorus water column profiles were used to quantify the release rate of phosphorus from the deepwater sediments of Irondequoit Bay during …
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The Impact of Nitrogen Additions On Cyanobacterial Abundance In Stormwater Detention Ponds On Kiawah Island, Sc
… is subject to high levels of nitrogen and phosphorus loading from golf course, residential, and road runoff, atmospheric inputs, wildlife waste, and oceanic inputs. This system is characterized by eutrophic conditions and recurrent water quality problems (hypoxia and anoxia, fish kills, and …
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Agricultural and forest land runoff in upper South River near Waynesboro, Virginia
… solids, turbidity, specific conductance, total phosphorus, total Kjeldahl nitrogen, nitrate, and iron. These data were used with flow and drainage area data to determine the relative magnitude and daily yields of materials from various sources. Sources of organic matter, suspended solids, and …
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CATCHMENT SCALE MONITORING AND MODELLING OF PHOSPHORUS USING FLOW INJECTION ANALYSIS AND AN EXPORT COEFFICIENT MODEL
… resolution is required for developing models of phosphorus transport and biogeochemical behaviour. Chapter One describes the behaviour of phosphorus in the aquatic environment, its sources, its role in the eutrophication process and legislation to control its release into aquatic systems. It also …
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Quantification of complex phosphorus removal reactions occurring within wetland filtration treatment systems
… increased operational experience indicate that phosphorus removal is variable or inconsistent, especially in cold-climate applications. These inconsistencies can be attributed to the complexity of phosphorus removal mechanisms, and the lack of consideration of these complexities in the design, …
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Organic Phosphorus Dynamics and Contributions to Eutrophication in a Shallow, Freshwater Bay
Phosphorus (P) is essential for aquatic life; cycling between both inorganic and organic forms to maintain an ecological balance. Its addition into P-scarce freshwaters, either through terrestrial (external) or sedimentary (internal) loading, may disrupt this balance causing blooms of phytoplankton …
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A water quality model for shallow river-lake systems and its application in river basin management
… patterns of nitrogen retention and sediment phosphorus release in a 100~km stretch of the highly eutrophic Lower Havel River. From the system analysis, strongly simplified conceptual approaches for modeling N-retention and P-remobilization in the studied river-lake system were obtained. In a …
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An evaluation of particulate phosphorus storage in an agricultural estuary
… of fine sediment delivery (both timing and loading) is fundamental to the assessment of non-point source pollution in estuarine environments. This study comprised three key components that led to the development of a fine sediment and particulate associated phosphorus budget in a typical …
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Environmental tradeoffs of denitrifying woodchip bioreactors
… Methane fluxes were in general negligible. Phosphorus concentrations and loads leaving the bioreactors were greater than those entering them. Phosphorus influent concentrations at BR1 averaged 0.02mgL-1 whereas effluent concentration averaged 0.3mg L-1. Phosphorus loading was 0.2 g P04-Pm-3 …
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Release and Transport of Bacteria and Nutrients from Livestock Manure Applied to Pastureland
… of best management practices to reduce loading of pathogens and nutrients to surface water bodies. The objectives of this study were to quantify the release and transport potential of three fecal bacterial indicators: E. coli, Enterococcus, and fecal coliforms; and nitrogen and …
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Applications of Reservoir Limnology Theory and Steady-State Modeling to Eutrophication Management in Beaver Lake, Arkansas
… of Chl-a and ST were related to whole-lake total phosphorus (TP) for modeled, measured, and target data sets between 2001-2015 for the purposes of estimating Vollenweider P loads. The most important finding of this study revealed that average of modeled and measured P loading required reductions …
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Struvite Recovery From Source-Separated Urine Utilizing Fluidized Bed Technology
… management, water conservation, and an impending phosphorus fertilizer shortage. Municipal wastewater systems are designed to treat the combination of urine, feces and graywater produced in household applications. Urine accounts for 1% of wastewater by volume, but provides 70-90% of nitrogen, …