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A 23-site monitoring well network located in the Trinity Aquifer region of Central Texas, with all wells penetrating the Middle Trinity Aquifer, was used with available values of aquifer storativity and specific yield to estimate recharge to the...
2007-11-28
2007-11-28
2001-10-01
Currently, sections of Harris and Montgomery counties located North and Northeast of Houston use groundwater almost exclusively. These areas have witnessed substantial population growth and associated increases in water demand. In 1999...
2007-11-28
2007-11-28
2001-10-01
The Rio Grande originates in the southern Colorado Rocky Mountains, flows through New Mexico, and forms the border between the U.S. and Mexico on its way to the Gulf of Mexico. Serving over one-million acres of irrigated land and the municipal and...
2007-11-28
2007-11-28
2001-02-01
An interdisciplinary research team, working in collaboration with and under the auspices of the Institute for Science, Technology and Public Policy in the George Bush School of Government and Public Service at Texas A&M University, conducted a...
2007-11-28
2007-11-28
2000-09-25
The investigation documented by this report consists of identifying, developing, and evaluating alternative approaches for estimating sequences of monthly naturalized streamflows at ungaged sites based on known naturalized flows at gaged...
2007-11-28
2007-11-28
1999-08-01
The EAA implemented a pilot irrigation suspension program in 1997 on 9,669 acres mainly in Medina and Uvalde counties with the objective of increasing springflow at Comal Springs, and providing relief to municipalities in meeting Critical Period...
2007-11-28
2007-11-28
1998-02-01
This study investigated the economics of an Edwards Aquifer region "dry-year option" buyout directed toward decreasing agricultural water use in an effort to augment springflow. The research involved several phases. First, we applied crop growth...
2007-11-29
2007-11-29
1997-04-01
Metal pollution of surface water resources in Texas is a significant problem, and is caused by the inflow of sediments from oil fields, old mines and industrial sites, and by the discharge of metal contaminated sewage and industrial effluents. In...
2007-11-29
2007-11-29
1997-06-01
The evolution of the Water Rights Analysis Package (WRAP) is outlined in the "Model Development Background" section of Chapter 1 of this report. The model was developed in conjunction with a series of university research projects sponsored by the...
2007-11-29
2007-11-29
1996-10-01
The exposure of an organism to a toxicant is defined by the magnitude, duration, and frequency with which the organism(s) interact with the toxicant(s). Predicting the exposure of organisms to toxicants during episodic events such as those...
2007-11-29
2007-11-29
1996-01-01
This report summarizes results from studies to determine relationships among the volume, duration and frequencies of floods in ungaged catchments in Texas. Methodologies were adopted for determining flood volumes at unregulated, non-urban...
2007-11-29
2007-11-29
1996-03-01
Using wastewater for irrigation of crops represents an attractive alternative to disposal. Typically, municipal wastewaters are high in sodium, and the resulting high sodium absorption ratio (SAR) alters the soil structure making it more...
2007-11-29
2007-11-29
1996-02-01
An expert geographic information system (expert GIS) for long-term regional water supply planning has been developed. This system has been evaluated through a case study examining a l9-county study region in South Texas with several water supply...
2007-11-29
2007-11-29
1995-06-01
There are increasing concerns that water quality of the Rio Grande (or Rio Bravo) may be deteriorating mainly due to the recent expansion of the maquilas program and associated population relocation into the Border area. This review was conducted...
2007-11-29
2007-11-29
1995-09-29
The Lower Colorado River Authority (LCRA) manages the Colorado River Basin in a ten county area stretching from central Texas to the gulf coast of Texas. In its recent "Water Management Plan for the Lower Colorado River," the Lower Colorado River...
2007-11-29
2007-11-29
1995-09-01
In order to prevent overfertilization, which could lead to groundwater contamination, rapid and accurate soil testing procedures are needed to evaluate agricultural surface soils for their potential to mineralize C and N. Our objectives were to...
2007-11-29
2007-11-29
1995-09-01
Effective management of the highly variable water resources of a river basin requires an understanding of the amount of suitable quality water that can be provided under various conditions within institutional constraints. Although much research...
2007-11-30
2007-11-30
1994-03-01
A July, 1994 workshop was held in College Station to examine information available on environmental issues facing the Rio Grande River basin along the U.S.-Mexico border in Texas. The objectives of the workshop were: 1. to identify current...
2007-11-30
2007-11-30
1994-10-01
Water availability is critical to the economy in the state of Texas. Numerous reservoirs and conveyance structures have been constructed across the State to meet the water supply needs of farmers, municipalities, industries, and power generating...
2007-11-30
2007-11-30
1994-11-01
The Seymour Aquifer of north-central Texas is known to have elevated levels of nitrates. The design of economically sound policies for reducing agriculture's nitrate contribution to the aquifer suggests a need to evaluate alternative management...
2007-11-30
2007-11-30
1994-12-01
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 of water supply for San...
2007-11-30
2007-11-30
1993-03-01
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 flow augmentation address...
2007-11-30
2007-11-30
1993-03-01
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 out of the rootzone....
2007-11-30
2007-11-30
1993-12-01
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 Aquifer. The lumped...
2007-11-30
2007-11-30
1993-09-01
Major expansion of the dairy industry has occurred in the last 12 years in North Central Texas, especially in Erath County. For several decades, this area has been the location of small dairy farms with sufficient land to maintain low animal...
2007-11-30
2007-11-30
1993-08-01
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