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 20 of 86 for “"lake water"”.
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Examining Implicit Price Variation for Lake Water Quality
… models are used to estimate implicit prices for water quality in housing markets. Recent studies aggregate sales across large spatial areas in scaled-up models leading to a concern that these models may overlook regional heterogeneity in water-quality preferences. We estimate scaled-up hedonic …
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Land Use Effects On Lake Water Quality In Central Florida
Land use affects the water quality of lakes. Different land use types yield different effects due to varying amounts and constituents of runoff. In this study, the effects of surrounding land use on the water quality of 50 lakes in Seminole County, Florida was assessed. Using GIS, I placed buffers …
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Gas chromatographic-electron capture analysis of disinfection byproducts from the chlorination of swimming pools and lake water
… the Environmental Protection Agency for drinking water. Water sources that contain a high amount of water life increase the amount of trihalomethanes produced when the water is chlorinated. Following the methods utilized by the Metropolitan Water District of Southern California, lake water from …
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Estimating the water quality condition of river and lake water in the Midwestern United States from its spectral characteristics
… remote sensing algorithms for water quality retrieval in Midwestern rivers and lakes. In the first part of this study, the spectral measurements collected using a hand-held spectrometer as well as water quality observations for the Wabash River and its tributary the Tippecanoe …
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Life history and microbiome analysis of freshwater fingernail clams (sphaeriidae) exposed to trace metal pollution
… mixtures influences the life histories of freshwater fingernail clams (Sphaeriidae) and if fingernail clams are selecting a different microbial community if chronically exposed to metal mixtures than if in a site that is not impacted by metal pollution. Fingernail clams are small, cosmopolitan, …
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Assessing the influence of geological and land-use gradients on zooplankton and phytoplankton biodiversity in the land between ecotone
… The goal of this study was to investigate water quality and plankton community patterns in lakes across TLB as a function of geological and spatial drivers. Lake water quality profiles were differentiated based on calcium concentrations, and increased watershed land-use was related to …
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Aquaponic biofilter system using heliconia sp. for ammonia removal in lake
Lakes are considered as one of the natural water resources in Malaysia. The quick pace of development around many lakes catchment areas has a significant impact on water quality. Consequently, biofilter aquaponic system for ammoniacal nitrogen removal in lake near non-point sources such as oil palm …
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The influence of algal growth and related ecological factors in reservoirs on the production and control of trihalomethane precursors
… reported in this thesis was conducted on Claytor Lake (Virginia) during the late spring, summer, and fall of 1981 and had as its objectives: 1) to assess the role of algae and bacteria in altering the pool of organic compounds, especially those that form trihalomethanes upon chlorination and 2) to …
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Analysis of water volume change of the lakes and reservoirs in the Mississippi River basin using Landsat imagery and satellite altimetry
In recent years, the demand for freshwater has been steadily increasing owing to population growth and economic expansion. Surface waters such as lakes and reservoirs function as a dominant factor in mankind's freshwater provision. Analysis of changes in their water storage is consequently vital …
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Hydroclimate variability in Central America during the Holocene inferred from lacustrine sediments in Lake Izabal, eastern Guatemala
… This project analyzed three sediment cores from Lake Izabal, eastern lowland Guatemala, with the goal of understanding changes in precipitation, lake productivity, and lake water chemistry during the Holocene. Our proxy results indicate that precipitation in the region increased from the early to …
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An integrated geochemical and sedimentological analysis of a lacustrine Lagerstätten in the Triassic Cow Branch Formation of the Dan River Basin
… that the lagerstätte was deposited during a lake transgression, under intermittently anoxic and ferruginous conditions. Sedimentological evidence shows a deepening followed by shoaling through a broad fining and subsequent coarsening of the sedimentary units of the sequence. This transition …
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The Roles of Local Organizations in Collaborative Resource Governance: A Qualitative Case Study of Lake Associations
… the globe are currently facing an epidemic of lake water quality degradation, primarily resulting from resource and land-use decisions that introduce excessive amounts of nutrients into the lake system. In many of these communities, local volunteer groups called lake associations work to …
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Continental-scale isotope hydrology
Providing sustainable sources of fresh water for a growing population of 7 billion people is one of the grand challenges of the 21st century. This dissertation outlines several applications of isotope hydrology to address four previously unknown questions involving surface- and ground-water …
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The influence of sediment nutrient dynamics on the response of lake ecosystems to restoration and climate change
… and recreation, have caused deterioration of water quality in many freshwater lakes worldwide. Apart from anthropogenic impacts, it is also recognized that climate has a direct influence on lake water temperature, nutrient loads, phytoplankton abundance and chemistry. However, little is known …
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Understanding key factors influencing habitat quality for the endangered fountain darter (Etheostoma fonticola) in the Comal River.
… into 3 main studies that took place in Landa Lake: water column, sediment, and plant nutrient analyses, an herbivory and soil fertility experiment, and a spatial study of diel dissolved oxygen dynamics. Nutrient data were collected via water samples, nutrient diffusing substrata (NDS), …
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Socio-Ecological Factors that Impact Sustainable Management of the lake Bosomtwe Basin in Ghana
… that hold back sustainability efforts in the Lake Bosomtwe basin in Ghana, how these factors change over time, and what determines their ability to absorb disturbances in either their ecological or social domains. A mixed methods approach was utilized, using primary, secondary, and tertiary …
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Socio-Ecological Factors that Impact Sustainable Management of the lake Bosomtwe Basin in Ghana
… that hold back sustainability efforts in the Lake Bosomtwe basin in Ghana, how these factors change over time, and what determines their ability to absorb disturbances in either their ecological or social domains. A mixed methods approach was utilized, using primary, secondary, and tertiary …
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