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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, Red, and Arkansas Rivers, in the states of Texas, Oklahoma, New Mexico, Kansas, and Colorado, are sources of salt emissions ....

By C. Keith Ganze,Ishtiaque Saleh,Awes S. Karama,Ralph A. Wurbs--Texas Water Resources Institute--2007-11-30
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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 applied annually is approximately 8.8 million. This is 60-65 percent of all water use in Texas. However, irrigated land contribute....

By Sukant Ruma Misra,Kathy Mathis,Ragy Darwish,Bobby Stanaland,Hovav Talpaz,John Robinson,Jeff Joh--Texas Water Resources Institute--2007-11-30
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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 regions. This study was undertaken to analyze existing data and to collect field data for the lower part of the Guadalupe Riv....

By Edward R. Holley--Texas Water Resources Institute--2007-11-30
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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 has attempted to: 1. Provide an overview of the organizational structure and functioning of RWSs, identifying their exist....

By R.N. Singh--Texas Water Resources Institute--2007-11-30
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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 atrazine and bifenthrin, based on published data of concentrations measured in fresh waters; in phase two, the impacts of higher le....

By Ray W. Drenner,Kyle D. Hoagland--Texas Water Resources Institute--2007-11-30
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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 processes that are nonlinear and highly size-dependent. Size-dependent transport and transformation mechanisms were simulated in thi....

By Desmond F. Lawler,Gerald W. Culkin--Texas Water Resources Institute--2007-11-30
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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 groundwater quality. This study was conducted to assess the environmental hazards that materials leaching from four MSW landfills p....

By K.C. Donnelly,G.E. Schrab,K.W. Brown--Texas Water Resources Institute--2007-11-30
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A stochastic simulation methodology was developed for the rainfall-runoff process to assist in the assessment of nonpoint source pollutant loads, particularly for ungauged watersheds where there is a scarcity or complete lack of historical data. The methodology was developed based on simulating individual rainfall-runoff events. A simulation model employed a rainfall si....

By Roger O. Dickey,Michael A. Collins--Texas Water Resources Institute--2007-11-30
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Solutions to Texas water policy and planning problems will be easier to identify once the impact of price upon community water demand is better understood. Several important questions cannot be addressed in the absence of such information. This study combines monthly water use reports, Census information, weather data, and water rates for more than two hundred Texas com....

By Chan Chang,Ronald C. Griffin--Texas Water Resources Institute--2007-11-30
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Furrow diking is a practical, efficient and low-cost technique to conserve water and increase crop yields. Improvements in diker design and the increased use of herbicides have resulted in the rapid spread of furrow diking in the Texas High Plains and other regions. To quantify the long-term effects of diking on crop yields, a computer simulation approach was used. Thr....

By Gerald F. Arkin,J. Hari Krishna--Texas Water Resources Institute--2007-11-30
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Water is a key resource of concern to residents and decision makers in the State of Texas and in many other parts of the United States. Careful planning for its use is of utmost importance for the State and the Nation. Such planning requires careful consideration of numerous factors including hydrologic and physiographic factors, engineering feasibility and economic fea....

By Banoo Parpia,Kenneth Bachman,Rita R. Hamm,Don E. Albrecht,Steve H. Murdock--Texas Water Resources Institute--2007-11-30
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Statement of the Problem Effective management of its surface water resources is essential to the continued growth and prosperity of the state of Texas. Rapid population and economic growth combined with depleting ground water reserves are resulting in ever-increasing demands being placed upon the surface water resources. The climate of the state is characterized by ext....

By W. Brian Walls,Patrick E. Carriere,Carla E. Bergman,Ralph A. Wurbs--Texas Water Resources Institute--2007-11-30
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