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Now showing items 21-30 of 186
An Economic Analysis of Agricultural Soil Loss in Mitchell County, Texas
(Texas Water Resources Institute, 1979-03)
The Federal Water Pollution Control Act Amendments of 1972, Public Law 92-500, established a national goal of eliminating the discharge of pollutants into the nation's waterways by 1985. As a step toward that goal an interim ...
Water and Solute Flow in a Highly-Structured Soil
(Texas Water Resources Institute, 1993-12)
Prevention of groundwater contamination by agricultural activities is a high priority in the United States. Water and contaminants often follow particular flow paths through the soil that lead to rapid movement of pesticides ...
Economic Impact of Withdrawing Specific Agricultural Pesticides in the Lower Rio Grande Valley
(Texas Water Resources Institute, 1993-01)
The Air, Pesticides, and Toxics Division of the Environmental Protection Agency (EPA) has encouraged all states to develop a plan to manage the use of pesticides to prevent application that would result in unreasonable ...
A Lumped Parameter Model for the Edwards Aquifer
(Texas Water Resources Institute, 1993-09)
A lumped parameter model has been developed to simulate monthly water levels and spring flows in the Edwards Aquifer. It is less complex and easier to use than the existing complex finite difference models for the Edwards ...
The Edwards Aquifer: An Economic Perspective
(Texas Water Resources Institute, 1993-03)
Business as usual has ceased to be an acceptable system for the Edwards because of the burden it imposes upon regional competitiveness and welfare. Nonrevisionist strategies such as surface water development and spring ...
New Irrigation System Design for Maximizing Irrigation Efficiency and Increasing Rainfall Utilization
(Texas Water Resources Institute, 1980-05)
A new concept in irrigation system design, which has the potential of significant savings in both water and energy requirements, has been developed and is under evaluation. The system is characterized by and has been labeled ...
Single Location Doublet Well to Reduce Salt-Water Encroachment: Phase I-Numerical Simulation
(Texas Water Resources Institute, 1983-09)
C. E. Jacob received patents in 1965 for a single location well doublet that would produce fresh water overlying salt-water without upconing of the heavier salt-water and pollution of the fresh water zone. No known evaluation ...
Economic and Hydrologic Implications of Proposed Edwards Aquifer Management Plans
(Texas Water Resources Institute, 1993-03)
The Edwards Aquifer underlies a large region in south central Texas extending from west of Uvalde to Austin. The karstic aquifer supports irrigated agriculture in the western part of the region, provides the sole source ...
On Managing Texas Rural Water Supply Systems: A Socioeconomic Analysis and Quality Evaluation
(Texas Water Resources Institute, 1991-05)
Research Objectives
The study reported here is aimed at evaluating the effectiveness of nonprofit, rural water supply corporations or water systems (hereafter referred to as RWSs) in Texas from a sociological perspective. ...
Sediment Transport in the Lower Guadalupe and San Antonio Rivers
(Texas Water Resources Institute, 1992-01)
Texas law requires that fresh water inflows into coastal regions be maintained at adequate levels for an ecologically sound environment; however, very limited data are available on the relation between river flow and ...