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Articles 7021 - 7050 of 8291
Full-Text Articles in Physical Sciences and Mathematics
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 …
Impact Assessment Of Coal Slurry Pipelines On Water Resources Utilization And Allocation, Muhammad Najmus Saquib, M. Levent Kavvas, David T. Kao, Lindell E. Ormsbee
Impact Assessment Of Coal Slurry Pipelines On Water Resources Utilization And Allocation, Muhammad Najmus Saquib, M. Levent Kavvas, David T. Kao, Lindell E. Ormsbee
KWRRI Research Reports
Pike county, the largest coal producing and exporting county from the state of Kentucky was studied to assess the impact of a possible coal slurry pipeline project on the water resources allocation and utilization in the region. Potential coal slurry pipelines from the region were identified and water requirement for operating several hypothetical pipelines were computed by using a recently developed computer program. Climatological data for the county were collected and analyzed for a 29-year period of record with a view to determining the monthly net consumptive use in the region. Available groundwater data for the region was also collected …
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 …
Evalution Of Drainage Tile To Alleviate Salt Building In Heavy Soils Irrigated With Brackish Water And Cropped With Rice And Soybeans, T. C. Keisling, J. T. Gilmour, H. D. Scott, A. M. Sadeghi, R. E. Baser
Evalution Of Drainage Tile To Alleviate Salt Building In Heavy Soils Irrigated With Brackish Water And Cropped With Rice And Soybeans, T. C. Keisling, J. T. Gilmour, H. D. Scott, A. M. Sadeghi, R. E. Baser
Technical Reports
The use of tile drains for alleviating soluble salt accumulation on silt loam soil was investigated during 1984. Although the chemical analyses of the floodwater and tile drainage water were very similar suggesting that the floodwater was moving to the tile drain, the overall results so far indicate that this is not a feasible solution owing to lack of significant drainage. Application of DRAINMOD utilizing soil and weather data from Arkansas showed no significant effluent from the tile drains for our experimental site during rice production. This was attributed to the extremely slow saturated hydraulic conductivity values for this particular …
Water Current, Volume 16, No. 4, July/August 1984
Water Current, Volume 16, No. 4, July/August 1984
Water Current Newsletter
Director's Report
Summary of UCOWR Annual Meeting
Symposium on Multiobjective Optimization
Groundwater Research Possibilties Explored
Nebraska Water Conference Council Fall Meeting
Research Review: Tillage Practice Effects on Water Conservation and the Efficiency and Management of Surface Irrigation Systems
NARD Annual Meeting
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 …
[Section] 404 Panel Discussion, Gregory J. Hobbs, Jr.
[Section] 404 Panel Discussion, Gregory J. Hobbs, Jr.
The Federal Impact on State Water Rights (Summer Conference, June 11-13)
5 pages.
Supplemental materials. Includes proposed bill language for Department of the Interior appropriations bill. Outline of key events and dates in the history of water law.
Panel: Section 404 Of The Clean Water Act And Section 7 Of The Endangered Species Act: Potential Impacts On Water Supplies [Supplemental Materials], Wendy C. Weiss
The Federal Impact on State Water Rights (Summer Conference, June 11-13)
57 pages.
Supplemental materials. Includes text of Riverside Irrigation District v. Andrews, 568 F.Supp 563 and Opening Brief of Plaintiff-Intervenor-Appellants in Riverside Irrigation District v. Andrews, Cases No. 83-2114, 83-2115, 83-2119, 83-2230, April 3, 1984.
Groundwater Control Programs Affecting Water Development, Arthur L. Littleworth
Groundwater Control Programs Affecting Water Development, Arthur L. Littleworth
The Federal Impact on State Water Rights (Summer Conference, June 11-13)
19 pages.
Ferc, Purpa And The Federal Power Act, Lawrence J. Wolfe
Ferc, Purpa And The Federal Power Act, Lawrence J. Wolfe
The Federal Impact on State Water Rights (Summer Conference, June 11-13)
62 pages.
Contains references.
Wetlands Preservation And The Protection Of Endangered Species As Limits On Western Water Development, A. Dan Tarlock
Wetlands Preservation And The Protection Of Endangered Species As Limits On Western Water Development, A. Dan Tarlock
The Federal Impact on State Water Rights (Summer Conference, June 11-13)
25 pages.
The Case For A Legislative Solution To Indian Water Claims, James M. Bush
The Case For A Legislative Solution To Indian Water Claims, James M. Bush
The Federal Impact on State Water Rights (Summer Conference, June 11-13)
57 pages.
Instream Flows As Reserved Rights On Federal Reservations After United States V. New Mexico, Hank Meshorer
Instream Flows As Reserved Rights On Federal Reservations After United States V. New Mexico, Hank Meshorer
The Federal Impact on State Water Rights (Summer Conference, June 11-13)
10 pages.
Effects Of The Clean Water Act On Water Availability And Development, Paula C. Phillips
Effects Of The Clean Water Act On Water Availability And Development, Paula C. Phillips
The Federal Impact on State Water Rights (Summer Conference, June 11-13)
12 pages.
Reserved Water Rights Of Indian Allotments, Richard B. Collins
Reserved Water Rights Of Indian Allotments, Richard B. Collins
The Federal Impact on State Water Rights (Summer Conference, June 11-13)
10 pages.
Contains references.
Agenda: The Federal Impact On State Water Rights, University Of Colorado Boulder. Natural Resources Law Center
Agenda: The Federal Impact On State Water Rights, University Of Colorado Boulder. Natural Resources Law Center
The Federal Impact on State Water Rights (Summer Conference, June 11-13)
Conference organizers and/or speakers included University of Colorado School of Law professors James N. Corbridge, Jr., David H. Getches, Lawrence J. MacDonnell and Richard B. Collins.
In general, water rights are a matter of state law. However, the availability and development of water are affected by important federal rights, policies and programs. In this conference, an outstanding group of private practitioners, government representatives and academics consider this important topic.
Developments In Federal Water Policies And Programs, Harold W. Furman Ii
Developments In Federal Water Policies And Programs, Harold W. Furman Ii
The Federal Impact on State Water Rights (Summer Conference, June 11-13)
14 pages.
Role Of The State Courts In Adjudicating Indian Water Rights, Jon L. Kyl
Role Of The State Courts In Adjudicating Indian Water Rights, Jon L. Kyl
The Federal Impact on State Water Rights (Summer Conference, June 11-13)
39 pages.
Negotiation As A Means Of Quantifying Indian Water Rights, Joseph R. Membrino
Negotiation As A Means Of Quantifying Indian Water Rights, Joseph R. Membrino
The Federal Impact on State Water Rights (Summer Conference, June 11-13)
88 pages.
Contains attachments.
Introduction To Reserved Water Rights, Ralph W. Johnson
Introduction To Reserved Water Rights, Ralph W. Johnson
The Federal Impact on State Water Rights (Summer Conference, June 11-13)
16 pages.
Indian Water Rights In The Supreme Court: A Review And Preview, Louis F. Claiborne
Indian Water Rights In The Supreme Court: A Review And Preview, Louis F. Claiborne
The Federal Impact on State Water Rights (Summer Conference, June 11-13)
12 pages.
Mix Design Investigation - Roller Compacted Concrete Construction, Upper Stillwater Dam, Utah, United States Department Of The Interior, Bureau Of Reclamation
Mix Design Investigation - Roller Compacted Concrete Construction, Upper Stillwater Dam, Utah, United States Department Of The Interior, Bureau Of Reclamation
Dams
Upper Stillwater Dam will be the first concrete dam constructed by the Bureau of Reclamation utilizing the RCC (roller compacted concrete) construction technique. RCC is concrete with zero slump consistency, which is deposited in horizontal lifts and consolidated in place by a smooth drum vibrating roller. This method of construction was first proposed in the early 1970's [1, 2, 3]* and was demonstrated successfully in emergency spillway repairs at Tarbela Dam, Pakistan [3], in the construction of Shimajigawa Dam, Japan, and Willow Creek Dam, Oregon.
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.
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.
Water Current, Volume 16, No. 3, May/June 1984
Water Current, Volume 16, No. 3, May/June 1984
Water Current Newsletter
Director's Report
FY 1984 Research Program
Water Use Efficiency Task Force Report
1984 Nebraska Water Conference Tabloid
1984 Irrigation Tour
1984 Water Resources Seminar Proceedings
Research Review: Scheduling Procedures with Limited Water for Improved Water Use Efficiency for Corn and Soybeans
The Role Of Nannoplankton In The Phytoplankton Dynamics Of Four Colorado River Reservoirs (Lakes Powell, Mead, Mohave, And Havasu), Jeffrey John Janik
The Role Of Nannoplankton In The Phytoplankton Dynamics Of Four Colorado River Reservoirs (Lakes Powell, Mead, Mohave, And Havasu), Jeffrey John Janik
Publications (WR)
Phytoplankton species composition and community size structure were studied in four warm-monomictic Colorado River reservoirs; lakes Powell, Mead, Mohave, and Havasu from March 1981 to February 1982. Sampling was done at approximately monthly intervals from several stations in each reservoir. The Utermohl technique was used to enumerate phytoplankton. The phytoplankton assemblage was divided into the following six size classes using microscopic techniques; netplankton (>64 um), and nannoplankton (>5, 5-11, 12-21, 22-44, and 45-64 um).
Total phytoplankton biomass and community size structure were different among these four reservoirs with considerable spatial and temporal variation present. Average reservoir-wide areal weighted …
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%; …
Resource Law Notes Newsletter, No. 2, Apr. 1984, University Of Colorado Boulder. Natural Resources Law Center
Resource Law Notes Newsletter, No. 2, Apr. 1984, University Of Colorado Boulder. Natural Resources Law Center
Resource Law Notes: The Newsletter of the Natural Resources Law Center (1984-2002)
No abstract provided.
Laser-Photoacoustic Detection Of Water Pollutants, Gregory J. Salamo, Richard J. Anderson
Laser-Photoacoustic Detection Of Water Pollutants, Gregory J. Salamo, Richard J. Anderson
Technical Reports
We have investigated the potential of amplitude-modulation laser-photoacoustic scheme for the detection of trace pollutants in water. The technique has been found to be non-disturbing and easy-to-apply. In particular, the technique could be used to detect pollutants with a concentration corresponding to an absorption coefficient of 10-6cm-1. The sensitivity was found to be limited by a background signal resulting from light absorption by water. In addition to the amplitude-modulation scheme we also investigated the potential of a wavelength modulation scheme. Although this approach did reduce the background signal due to water absorption, we found the technique to be much more …
Water Current, Volume 16, No. 1, January/February 1984
Water Current, Volume 16, No. 1, January/February 1984
Water Current Newsletter
Director's Report
Water Policy Alternatives
Computerized Pivot Management Tested
Federal Water Publications
Research Review: Water Conservation Through Limited Irrigation of Corn and Grain Sorghum in the Great Plains
Call for Papers