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Articles 2341 - 2370 of 2530
Full-Text Articles in Hydrology
Finite Element Simulation Of Saturated-Unsaturated Subsurface Flow, George E. Blandford
Finite Element Simulation Of Saturated-Unsaturated Subsurface Flow, George E. Blandford
KWRRI Research Reports
A two-dimensional transient model for flow through saturated-unsaturated porous media is developed, The model numerically solves the pressure head dependent or moisture content dependent form of Richard's equation. The model code uses isoparametric quadratic triangular and/or quadrilateral finite elements for the geometric representation and for the weak Galerkin spacial integrations. An implicit, unconditionally stable single-step numerical time integration scheme with an oscilliatory noise reduction option is utilized for the temporal discretization. The highly efficient symmetric skyline (profile) solution scheme is used to solve the resulting simultaneous equations. The nonlinear subsurface flow parameters are approximated using cubic spline interpolation. The element …
Discharge And Travel Time Determinations In The Royal Spring Groundwater Basin, Kentucky, John Thrailkill, Douglas R. Gouzie
Discharge And Travel Time Determinations In The Royal Spring Groundwater Basin, Kentucky, John Thrailkill, Douglas R. Gouzie
KWRRI Research Reports
Groundwater flow in many karst regions, including the Inner Bluegrass Karst Region of central Kentucky in which the study area was located, is unlike groundwater flow in granular aquifers. At least the major flows are turbulent and often with a free surface in large conduits, and applying concepts based on Darcy's Law to describe and model these flows is inappropriate. Parameters such as linear velocity, channel geometry, and conveyance used to describe surface streamflows are more applicable, and the primary objective of the project was to estimate these in a groundwater basin using the travel time of dye slugs and …
Identification Of Soil-Water Chemical Parameters For The Prediction And Treatment Of Suspended Solids In Surface Water Reservoirs Of Coal Mine Lands, V. P. Evangelou, J. H. Grove, R. I. Barnhisel
Identification Of Soil-Water Chemical Parameters For The Prediction And Treatment Of Suspended Solids In Surface Water Reservoirs Of Coal Mine Lands, V. P. Evangelou, J. H. Grove, R. I. Barnhisel
KWRRI Research Reports
High concentrations of suspended solids in coal mine sedimentation ponds are a factor in lowering water quality. This study focuses on the influence dissolved solids have on concentration and settling of suspended solids. Water samples from sedimentation ponds in Eastern and Western Kentucky were used to evaluate water composition in such ponds. Spoil samples from surface mine sites in both parts of the state were used to evaluate water composition released from the spoils upon introducing water.
The results demonstrate that water quality emanating from coal spoils of Eastern and Western coal mines is dependent on the type of spoil …
Enteric Contamination Of An Urban Karstified Carbonate Aquifer: The Double Springs Drainage Basin, Bowling Green, Kentucky, Geary Schindel
Enteric Contamination Of An Urban Karstified Carbonate Aquifer: The Double Springs Drainage Basin, Bowling Green, Kentucky, Geary Schindel
Masters Theses & Specialist Projects
Biological and chemical analysis of water samples, collected from surface and subsurface streams was preformed to determine the quantity and biologic sources of enteric contamination in the Double Springs Groundwater Basin, an urban karstified carbonate aquifer under Bowling Green, Kentucky. Major flow paths, drainage basin boundaries and geologic/hydrologic relationships were identified for the basin. Analysis of biologic contaminates using fecal coliform /fecal streptococcus counts and ratios were conducted for baseflow and storm events and related to the Double Springs hydrographs. Analysis was also conducted to determine the source of sulfides responsible for the growth of sulfur fixing bacteria in the …
A Bacteriological And Chemical Analysis Of Nonpoint Source Pollution In A Karst Aquifer Bowling Green, Kentucky, Wayne Green
A Bacteriological And Chemical Analysis Of Nonpoint Source Pollution In A Karst Aquifer Bowling Green, Kentucky, Wayne Green
Masters Theses & Specialist Projects
Monthly water samples collected from four sites in the Lost River Groundwater Basin, a shallow karst aquifer in the Bowling Green-Warren County area of Kentucky, represented samples from sites receiving conduit and diffuse flow. All sites were severely contaminated with bacteria, and on some occasions the surface water criteria for some heavy metals were exceeded.
Of the total 334 bacterial colonies identified 92.1% were verified as Escherichia coli by the API20E system. Acinetobacter calcoaceticus var. anitratum accounted for 2.10% of colonies; Citrobacter freundii for 0.30% Klebsiella pneumoniae for 0.90%; Klebsiella oxytoca, 0.90%; Citrobacter amalonaticus 0.30%; Enterobacter cloacae, 1.20%; …
Effects Of The Plains Pocket Gopher (Geomys Bursarius) On Hay Meadows And Irrigated Alfalfa In The Nebraska Sandhills, Patrick J. Hegarty
Effects Of The Plains Pocket Gopher (Geomys Bursarius) On Hay Meadows And Irrigated Alfalfa In The Nebraska Sandhills, Patrick J. Hegarty
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Vital Characteristics Of The Black-Tailed Jack Rabbit In East-Central Nebraska, Rockford G. Plettner
Vital Characteristics Of The Black-Tailed Jack Rabbit In East-Central Nebraska, Rockford G. Plettner
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Soil Conservation Research In New South Wales And Its Significance To Research On Water Erosion In Western Australia, D J. Mcfarlane
Soil Conservation Research In New South Wales And Its Significance To Research On Water Erosion In Western Australia, D J. Mcfarlane
Resource management technical reports
No abstract provided.
Soil Types And Drainage, Eric Bettenay, N. J. Schofield
Soil Types And Drainage, Eric Bettenay, N. J. Schofield
Journal of the Department of Agriculture, Western Australia, Series 4
At least 90 per cent of the phosphorus entering the Peel-Harvey estuarine system comes from land cleared for agriculture, most of it from the coastal plain. These soils are naturally deficient on phosphorus and sulfur and this is supplied in superphosphate, which contains about 10 per cent phosphorus and 1 percent sulphur.
However, rain leaches some of this applied phosphorus from the land into drains and rivers which flow into the estuary. In 1981, farmers in the Harvey River-Mayfields Drain catchment lost the equivalent of 1,300 tonnes of superphosphate into the estuary. Between them they have in effect spent $120,000 …
Tackling The Problem Off The Farm, C M. Croft
Tackling The Problem Off The Farm, C M. Croft
Journal of the Department of Agriculture, Western Australia, Series 4
Methods of redusing phosphorus losses from the catchment soils of the Peel-Harvey esturine system have been discussed in other articles in this Journal.
This article briefly discusses a range of 'off the farm' techniques to improve phosphorus flushing from Peel Inlet or Harvey Estuary to the sea and to treat the phosphorus and the algae. These techniques were among more than 100 management options evaluated by the Peel-Harvey Study Group.
Investigations And Research In Nevada By The Water Resources Division, U. S. Geological Survey, 1982-83, Terry Katzer, Otto Moosburner, William D. Nichols
Investigations And Research In Nevada By The Water Resources Division, U. S. Geological Survey, 1982-83, Terry Katzer, Otto Moosburner, William D. Nichols
Publications (WR)
The Water Resources Division, U.S. Geological Survey, is charged with (1) maintaining a hydrologic network in Nevada that provides information on the status of the State's water resources and (2) engaging in technical water-resources investigations that have a high degree of transferability. To meet these broad objections, 26 projects were active in Nevada during fiscal year 1982 in cooperation with 36 Federal, State, and local agencies. Total funds were $3,319,455, of which State and local cooperative funding amounted to $741,500 and Federal funding (comprised of Geological Survey Federal and cooperative programs plus funds from six other Federal agencies) amounted to …
Hydrochemical Data For The Truckee River Drainage System, California And Nevada, Larry V. Benson
Hydrochemical Data For The Truckee River Drainage System, California And Nevada, Larry V. Benson
United States Geological Survey: Staff Publications
Abstract
Surface-water samples were collected from the Truckee River drainage system during 1975, 1976, and 1981. Data resulting from chemical analyses of these samples, as well as certain other previously unpublished data, are tabulated in this report. The report contains the following hydrochemical data:
1. Chemical composition of 21 tributaries to Lake Tahoe and the Truckee River upstream from Farad, California (May and October 1971, and June 1972).
2. Chemical composition of the Truckee River at Tahoe City (January 1968-January 1975) and at Farad, California (January 1968-June 1980), and of the Little Truckee River upstream from Stampede Reservoir, California (January …
Disposal Of Household Wastewater In Soils Of High Stone Content (1981-1983), E. M. Rutledge, C. R. Mote, D. T. Mitchell, M. S. Hirsch, M. D. Harper, H. D. Scott, C. L. Griffis
Disposal Of Household Wastewater In Soils Of High Stone Content (1981-1983), E. M. Rutledge, C. R. Mote, D. T. Mitchell, M. S. Hirsch, M. D. Harper, H. D. Scott, C. L. Griffis
Arkansas Water Resources Center Technical Reports
Four experimental filter fields were constructed with built-in monitoring equipment in Nixa soils. These soils contain many chert fragments and a fragipan about 60 cm below the soil surface. The fragipan restricts downward movement of water and is the designlimitingfeature. The four filter fields were: 1. A "standard" filter field, 76 cm deep. The bottom of the trench was in the fragipan. 2. A "modified standard" filter field, 30 cm deep. The bottom of the trench was above the fragipan. 3. A "modified pressure" filter field, 40 cm deep. The bottom of the trench was above the fragipan. In addition, …
Water Requirement For Coal Slurry Transportation, David T. Kao, Sandra L. Rusher
Water Requirement For Coal Slurry Transportation, David T. Kao, Sandra L. Rusher
KWRRI Research Reports
The amount of water required for coal slurry transportation is a function of the coal properties and the magnitude of coal movement. The pipeline system characteristics and the method of slurry preparation also affects the overall water requirement of the system. In the present study methodologies are developed based on reported and modified coal slurry flow correlation equations to determine the quantity of water needed under various coal transport and flow conditions. Auxiliary water requirements including start-up and flushing water storage; related evaporation and seepage losses are also included. A computer program and several monographs are presented to provide a …
Improved Methods And Guidelines For Modeling Stormwater Runoff From Surface Coal Mined Lands, Michael E. Meadows, George E. Blandford
Improved Methods And Guidelines For Modeling Stormwater Runoff From Surface Coal Mined Lands, Michael E. Meadows, George E. Blandford
KWRRI Research Reports
The investgations, developments and guidelines for several hydrologic modeling strategies are presented. Investigations were conducted to determine appropriate event curve numbers for surface mined disturbed watersheds; and performance of four synthetic unit hydrograph models (SCS curvilinear, SCS single triangle, Williams and TVA double triangle) on 38 USDA experimental watersheds in 14 physiographic provinces using in excess of 270 events. A second test using only the SCS curvilinear unit hydrograph on 11 small watersheds and 48 events was conducted to investigate the excess rainfall pattern simulated with the curve number model. A procedure for developing a unit hydrograph using the time …
Methiocarb And Thiram As Thirteen-Lined Ground Squirrel Repellents In Newly Planted Corn, Ann E. Koehler
Methiocarb And Thiram As Thirteen-Lined Ground Squirrel Repellents In Newly Planted Corn, Ann E. Koehler
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Atlas Of Wetlands In The Principal Coal Surface Mining Region Of Western Kentucky, William J. Mitsch, Jan R. Taylor, Kimberly B. Benson, Paul L. Hill Jr.
Atlas Of Wetlands In The Principal Coal Surface Mining Region Of Western Kentucky, William J. Mitsch, Jan R. Taylor, Kimberly B. Benson, Paul L. Hill Jr.
KWRRI Research Reports
This atlas contains maps of wetlands and surface mining activity in the Western Kentucky Coal Field, and focuses on a 3960 km2 (1530 mi2) region where approximately 90 percent of surface mining in the Coal field occures. Some present and potential competition exists between surface coal mining and wetland protection. A wetland classification, based on the recent FWS classification, includes six types of palustrine systems and one each of riverine and laucstrine systems. Wetlands and surface mines are located on twenty-seven 7.5 minute USGS quadrangles that define the study region. A total of 460 km2 (177 …
Predicting Infiltration And Surface Runoff From Reconstructed Spoils And Soils, Larry G. Wells, Andrew D. Ward, Ronald E. Phillips
Predicting Infiltration And Surface Runoff From Reconstructed Spoils And Soils, Larry G. Wells, Andrew D. Ward, Ronald E. Phillips
KWRRI Research Reports
A laboratory system was fabricated to measure infiltration and runoff from spoil and soil profiles constructed in rectangular bins. Construction, calibration and operation of a rainfall simulator is discussed and instrumentation used to measure transient infiltration and transmittance of water through experimental profiles is described.
Spoil and soil materials from surface mines in Eastern and Western Kentucky were transported to the laboratory and used in constructing experimental profiles in rectangular bins (0.91 x 1.83 x 1.07 m). An extensive series of infiltration experiments were conducted utilizing a rainfall simulator and soil moisture monitoring instrumentation. A dual probe gamma density gauge …
Modeling Surface And Subsurface Stormflow On Steeply-Sloping Forested Watersheds, Patrick G. Sloan, Ian D. Moore, George B. Coltharp, Joseph D. Eigel
Modeling Surface And Subsurface Stormflow On Steeply-Sloping Forested Watersheds, Patrick G. Sloan, Ian D. Moore, George B. Coltharp, Joseph D. Eigel
KWRRI Research Reports
A simple conceptual rainfall-runoff model, based on the variable source area concept, was developed for predicting runoff from small, steep-sloped, forested Appalachian watersheds. Tests of the model showed that the predicted and observed daily discharges were in good agreement. The results demonstrate the ability of the model to simulate the "flashy" hydrologic behavior of these watersheds.
Five subsurface flow models were evaluated by application to existing data measured at Coweeta on a reconstructed homogeneous forest soil. The five models were: Nieber 's 2-D and 1-D finite element models (based on Richards' equation), the kinematic wave equation, and two simple storage …
Studies In Dye-Tracing Technologies In Karst Hydrogeology, John Thrailkill, Phillip E. Byrd, Stephen B. Sullivan, Lawrence E. Spangler, Charles J. Taylor, Greta K. Nelson, Kevin R. Pogue
Studies In Dye-Tracing Technologies In Karst Hydrogeology, John Thrailkill, Phillip E. Byrd, Stephen B. Sullivan, Lawrence E. Spangler, Charles J. Taylor, Greta K. Nelson, Kevin R. Pogue
KWRRI Research Reports
Information on fluorescent dyes used for water tracing and the results of six studies are reported. Optical brightener, direct yellow, fluorescein, rhodamine (WT), and other dyes are described and the procedures employed in their use ·in the field and in equilibration experiments are discussed. Three of the six studies consisted of investigations of the equilibration with passive detectors of three of the dyes. The absorption of optical brightener on fabric detectors was apparently linear with concentration and with immersion time, while detectors became rapidly saturated with direct yellow. Equilibrium of fluorescein on charcoal detectors with an elutriating solution was not …
Transboundary Groundwater Law: Focus On The U.S.-Mexico Boundary [Includes Appended Opinion In City Of El Paso Ex Rel. Pub. Serv. Bd. V. Reynolds, Civ. No. 80-730 Hb, 563 F. Supp. 279 (D.N.M. 1983)], Albert E. Utton
Groundwater: Allocation, Development and Pollution (Summer Conference, June 6-9)
48 pages.
Federal And Indian Reserved Rights To Groundwater [Outline], Robert S. Pelcyger
Federal And Indian Reserved Rights To Groundwater [Outline], Robert S. Pelcyger
Groundwater: Allocation, Development and Pollution (Summer Conference, June 6-9)
6 pages.
Comparative Approaches To Groundwater Management, Robert D. Hayton
Comparative Approaches To Groundwater Management, Robert D. Hayton
Groundwater: Allocation, Development and Pollution (Summer Conference, June 6-9)
38 pages.
Problems Of Interstate Allocation Of Groundwater, Charles E. Corker
Problems Of Interstate Allocation Of Groundwater, Charles E. Corker
Groundwater: Allocation, Development and Pollution (Summer Conference, June 6-9)
41 pages.
Ground Water Monitoring System And Procedures At Kin-Buc I Landfill Middlesex County New Jersey, Dan D. Raviv
Ground Water Monitoring System And Procedures At Kin-Buc I Landfill Middlesex County New Jersey, Dan D. Raviv
Groundwater: Allocation, Development and Pollution (Summer Conference, June 6-9)
37 pages (includes illustrations and map).
Groundwater Management Under The Florida Water Resources Act, Richard Hamann
Groundwater Management Under The Florida Water Resources Act, Richard Hamann
Groundwater: Allocation, Development and Pollution (Summer Conference, June 6-9)
44 pages (includes maps).
Groundwater And Intergovernmental Relations In The Southern San Joaquin Valley, California, Sally K. Fairfax, Barbara T. Andrews
Groundwater And Intergovernmental Relations In The Southern San Joaquin Valley, California, Sally K. Fairfax, Barbara T. Andrews
Groundwater: Allocation, Development and Pollution (Summer Conference, June 6-9)
25 pages (includes maps).
Ogallala Ground Water, Morton W. Bittinger
Ogallala Ground Water, Morton W. Bittinger
Groundwater: Allocation, Development and Pollution (Summer Conference, June 6-9)
12 pages.
The San Luis Valley Groundwater Dispute, David Harrison, Jeris Danielson
The San Luis Valley Groundwater Dispute, David Harrison, Jeris Danielson
Groundwater: Allocation, Development and Pollution (Summer Conference, June 6-9)
25 pages (includes illustrations and map).
Groundwater Quality: The Issues, Remedies And Strategies, Kathleen M. Kulasza
Groundwater Quality: The Issues, Remedies And Strategies, Kathleen M. Kulasza
Groundwater: Allocation, Development and Pollution (Summer Conference, June 6-9)
34 pages.