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.
Results
Showing 1 to 10 of 10 for “"water quality constituents"”.
-
Modeling the Dynamics of Hypoxia and Its Interaction with Optically Active Water Quality Constituents Using Remote Sensing and Regression Analysis
Elucidating the drivers and dynamics of coastal water quality is a modern challenge. Diverse waterbodies, from freshwater streams to large bays are stressed by industrialization, population growth, and a changing climate. Hypoxia, or depressed dissolved oxygen, is one of the most ubiquitous …
-
Emerging Contaminants: Occurrence of ECs in Two Virginia Counties Private Well Water Supplies and Their Removal from Secondary Wastewater Effluent
… environmental matrices, including drinking water supplies at trace concentrations (ng/L-ug/L or ng/kg-ug/kg). Current wastewater treatment plant technology is largely ineffective at removing ECs. The objectives of this investigation were to: 1) determine the occurrence of ECs in private well …
-
Springing for Safe Water: Drinking Water Source Selection in Central Appalachian Communities
… Central Appalachia that collect their drinking water from roadside springs despite having access to in-home piped point-of-use (POU) water. Residents have cited perceptions about water availability/quality as primary motivators for collecting drinking water from roadside springs. Water from …
-
Occoquan Reservoir and Watershed: A Water Quality Assessment 1973–2019
… systems in the United States. It in an important water supply source for the Northern Virginia area, as well as, an ecological and recreational area. Furthermore, the Occoquan Reservoir protects the water quality of the Chesapeake Bay because it acts as a trap for sediments and pollutants. …
-
A hydrologic calibration of the SWAT model in Kranji Catchment, Singapore
… recreational activities in Singapore's surface waters through the Active, Beautiful, and Clean Waters Program (ABC Waters). One area of concern with ABC Waters is microbial pollution. Pathogens pose an immediate and substantial risk to human health when humans come into contact with contaminated …
-
Two-Dimensional Lake and Reservoir Modeling: Natural and Plume-Induced Mixing Mechanisms
… constituent and density structures. Transport in waterbodies can be natural, such as seiche-induced boundary mixing or advectively-driven inflows. Hypolimnetic oxygenation using bubble-plumes also leads to enhanced mixing. Whether natural or plume-induced, increased mixing will alter the waterbody …
-
A Complex, Linked Watershed-Reservoir Hydrology and Water Quality Model Application for the Occoquan Watershed, Virginia
The Occoquan Watershed is a 1515 square kilometer basin located in northern Virginia and contains two principal waterbodies: the Occoquan Reservoir and Lake Manassas. Both waterbodies are principal drinking water supplies for local residents and experience eutrophication and summer algae growth. …
-
Increased Perviousness Versus Urban Densification: Trade-offs Between Adaptation and Mitigation In A Changing Climate
… to understand the implications of different water management efforts on these options, especially within the context of a changing climate, because of the potential interactions among various efforts. In particular, it is imperative to understand these implications because of the rapid growth …
-
Evaluation and implementation of adsorption technologies for the treatment of per and polyfluoroalkyl substances
Contamination of water resources by per- and polyfluoroalkyl substances (PFAS(s)) has recently emerged as a significant problem worldwide. Applications of PFASs in household products, electronics, and firefighting foams has created substantial environmental remediation challenges in the treatment …
-
Effective Modeling of Nutrient Losses and Nutrient Management Practices in an Agricultural and Urbanizing Watershed
The Lake Manassas Watershed is a 189 km2 basin located in the Northern Virginia suburbs of Washington, DC. Lake Manassas is a major waterbody in the watershed and serves as a drinking water source for the City of Manassas. Lake Manassas is experiencing eutrophication due to nutrient loads …