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Influence Of Grain Size Of A Porous Medium On The Movement Of Diesel Fuel Due To Water Table Fluctuations, Vasanthakumar Rajagopalan
Influence Of Grain Size Of A Porous Medium On The Movement Of Diesel Fuel Due To Water Table Fluctuations, Vasanthakumar Rajagopalan
UNLV Retrospective Theses & Dissertations
Experiments were conducted in a sand tank to determine the influence of grain size of a porous medium and residual water saturation on the movement of diesel fuel. Three different grades of sand (#12, #20, and #30 grades with mean grain diameters of 0.178cm, 0.08cm, and 0.056cm respectively) were used in the experiments. A water table was simulated and the sand above the capillary fringe was initially at residual water saturation. Diesel fuel (5 liters) was leaked into the sand, above the capillary fringe. A uniform, symmetrical pattern of diesel fuel smearing was observed for all the three grain sizes …
An Assessment Of The Potential To Use Water Chemistry Parameters To Define Ground Water Flow Pathways At Grand Canyon National Park, Arizona, Kim Alison Zukosky
An Assessment Of The Potential To Use Water Chemistry Parameters To Define Ground Water Flow Pathways At Grand Canyon National Park, Arizona, Kim Alison Zukosky
UNLV Retrospective Theses & Dissertations
The purpose of this study is to assess the potential to use water chemistry parameters to determine ground water flow pathways at the south rim of Grand Canyon National Park, Arizona. South rim spring, ground, and surface waters and one north rim spring were sampled from September 1992 through September 1993. Field measurements (pH, electrical conductivity, alkalinity, temperature, total dissolved solids, and dissolved oxygen), major anion (fluoride, chloride, bromide, nitrate, phosphate, and sulfate) concentrations, selected trace element concentrations, and the ratios of the stable isotopes of oxygen and hydrogen. Major anion, trace element, and field measurement data were analyzed using …
Ground Water - Surface Water Interactions In The Lower Virgin River Area, Arizona And Nevada, Lynn Metcalf
Ground Water - Surface Water Interactions In The Lower Virgin River Area, Arizona And Nevada, Lynn Metcalf
UNLV Retrospective Theses & Dissertations
This study assessed interactions between ground water and surface water in the lower Virgin River, Arizona and Nevada, using stable isotopes and major ions as environmental tracers. The study reach starts at the Virgin River Gorge in Arizona and terminates at Lake Mead in Nevada, 80 km downstream. Discharge data showed that major sources of water for the lower Virgin River were discharge from the upper Virgin River and the Littlefield Springs, with minor amounts from Beaver Dam Wash, a perennial tributary. No strong evidence was found for ground-water seepage into the channel. In general, dissolved solids concentrations increased downstream …
The Impact Of Nonpoint Source Pollution From Mining Wastes On Water Quality, Elko County, Nevada, Samuel Earman
The Impact Of Nonpoint Source Pollution From Mining Wastes On Water Quality, Elko County, Nevada, Samuel Earman
UNLV Retrospective Theses & Dissertations
A study was performed at a mine site in Elko County, Nevada to determine the effects on water quality resulting from waste rock at the site. Statistically significant (alpha less than or equal to 0.05) increases of several constituents, including sulfate (272 mg/L), calcium (46 mg/L), and magnesium (39 mg/L), were found to occur in the North Fork of the Humboldt River as it flows through the mine site. Geochemical modeling and historical data suggested that waste rock from the mine is primarily responsible for the increase in dissolved solids concentration. Electrical conductivity of the water exhibits seasonal fluctuations, with …