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The TAMU Digital Repository
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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 |
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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 |
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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 |
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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 |
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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 1995-05-05 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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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A field study was conducted to determine the influences of vegetation composition, buffer width, and infiltration rate on the effectiveness of native vegetation buffer zones as nonstructural treatments of urban runoff with respect to increasing...
2007-11-30
2007-11-30 1993-10-01 |
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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 risks to human health and...
2007-11-30
2007-11-30 1993-01-01 |
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The Brazos River Basin is representative of several major river basins in the Southwestern United States in regard to natural salt pollution. Geologic formations underlying portions of the upper watersheds of the Brazos, Colorado, Pecos, Canadian,...
2007-11-30
2007-11-30 1993-08-01 |
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There are 6.4 million irrigated acres in Texas with 80 percent irrigated from ground water and 20 percent irrigated from surface sources. This is compared to 8.6 million acres irrigated in 1979, a dramatic reduction. Total acre feet of water...
2007-11-30
2007-11-30 1993-11-01 |
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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 sediment transport to coastal...
2007-11-30
2007-11-30 1992-01-01 |
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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. Specifically, the study...
2007-11-30
2007-11-30 1991-05-01 |
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This study was an investigation of the effects of the herbicide atrazine and the insecticide bifenthrin on lake communities. The study was conducted in two phases: in phase one, we examined the effects of environmentally realistic levels of...
2007-11-30
2007-11-30 1991-04-01 |
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Conventional water quality assessment and simulation of particles in natural waters focus on bulk concentrations of the suspended solid phase. These analyses rely directly or indirectly on a linear, 'average particle' approach to describe...
2007-11-30
2007-11-30 1991-08-01 |
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Municipal solid waste (MSW) landfills have been found to contain many of the same hazardous constituents as found in hazardous waste landfills. Because of the large number of MSW landfills, these sites pose a serious environmental threat to...
2007-11-30
2007-11-30 1991-10-01 |
