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Full-Text Articles in Physical Sciences and Mathematics
Investigating A Passive Treatment System For The Removal Of Nutrients From Urban Runoff, Jasminn Gray
Investigating A Passive Treatment System For The Removal Of Nutrients From Urban Runoff, Jasminn Gray
UNLV Theses, Dissertations, Professional Papers, and Capstones
The Environmental Protection Agency recognizes urban runoff as a major contributor of surface water pollution with nutrients as the second largest cause of surface water impairment in the United States. While a water quality standard of 100 lbs/day total phosphorus load allocation for all nonpoint sources is permitted for the Las Vegas Valley (LVV) under the National Pollutant Discharge Elimination System, currently there is not a counterpart standard for nitrogen. With the continued development of the LVV and the depletion of the quantity of water in Lake Mead due to the ongoing drought, the concentrations of phosphorus and nitrogen species …
Scenes From The Swale: Investigating Spatial And Temporal Dimensions Of Nitrogen Cycling In Urban Stormwater Bioretention Facilities, Erin Nicole Looper
Scenes From The Swale: Investigating Spatial And Temporal Dimensions Of Nitrogen Cycling In Urban Stormwater Bioretention Facilities, Erin Nicole Looper
Dissertations and Theses
Urban development is transforming landscapes at unprecedented rates. Human activities and landscape modifications associated with urbanization extensively increase hydrologic demands and modify natural hydrologic systems; consequently, population growth occurring in urban areas increases pressure on water resources. Urban aquatic ecosystems are vulnerable to impacts associated with increased connectivity with urban surfaces and hydrologic changes that initiate long-term changes in receiving waterbodies. Nitrogen (N) loading from urban and suburban catchments to receiving surface waters can lead to impairment of aquatic ecosystems and is a concern in many cities with water quality issues. To improve urban water quality, cities are increasingly adopting …
Hydrological Patterns And The Effects Of Land Use On Tss Concentrations And Yields In The Mccarthy Creek Watershed, Portland, Oregon, David Farmer
Environmental Science and Management Professional Master's Project Reports
The spread of impervious surface areas and the reduction of tree canopy via urbanization has numerous water quality impacts on Pacific Northwest watersheds. One such impact is elevated levels of Total Suspended Solids (TSS) in run-off during storm events, particularly in steep, forested watersheds undergoing urbanization. This project was developed in collaboration with the West Multnomah Soil and Water Conservation District and focused on the McCarthy Creek Watershed, as a case-study watershed located in Portland, OR. The study aimed to identify elevated TSS concentrations and yields during storm events on both mainstem and tributary sampling locations, establish the relationship between …
The Effects Of Utility Pole Placement And Characteristics On Pentachlorophenol Concentrations Entering Underground Injection Control (Uic) Devices: City Of Gresham, Oregon, Katie Bohnren
Environmental Science and Management Professional Master's Project Reports
Urbanization is causing increased amounts of stormwater runoff, while simultaneously decreasing the amount of pervious surface area for infiltration. Multiple priority pollutants have been identified in urban stormwater, including pentachlorophenol (PCP). PCP is often found in stormwater samples exceeding the Safe Drinking Water Act limit of 1μg/L and can cause human health issues with exposure over time. Treated wood utility poles are the major source of PCP in urban stormwater. With the use of underground injection control (UIC) devices as an alternative method to treat and dispose of stormwater, the potential exists for groundwater contamination of PCP. The City of …
Estimated Area Of Impervious Parking Surfaces And The Potential Groundwater Recharge Increase Through Permeable Pavement Retrofit In The Chino Basin, Zablon Afera Adane
Estimated Area Of Impervious Parking Surfaces And The Potential Groundwater Recharge Increase Through Permeable Pavement Retrofit In The Chino Basin, Zablon Afera Adane
Theses Digitization Project
California recently declared a state of emergency over drought followiing three years of below average rain and snowfall. There is a consensus among many involved in water supply in California for finding new sources of water, conservation, and increasing recharge to replenish the groundwater with surface water that would have been lost to run off. This study investigates the amount of stormwater that could potentially be reinvested as groundwater recharge by simply transforming selected impermeable parking lots of the commercial, industrial, and institutional sectors into pervious pavement that allow water to infiltrate rather than be lost as urban runoff.