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txspace.tamu.edu 檢索結果共 5447 筆,本頁資料從第 121 筆到第 132 筆

A readership survey conducted in May 1977 found that readers of Texas Water Resources find it useful, attractive and informative. The bulletin is published by the Texas Water Resources Institute to generate public awareness and understanding of water resources issues. The 31 percent response rate from the survey was evidence that the publication is well received. Resul....

By L. E. Ruesink--Texas Water Resources Institute--2007-12-10
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This research was undertaken to specify and estimate a model relating household demand for urban water to its principal determinants. Four specific tasks were accomplished: 1. An appropriate economic demand model for urban-residential water supplies was postulated. An improved specification of the rainfall variable was developed to account for turf maintenance deman....

By B. R. Beattie,H.S. Foster--Texas Water Resources Institute--2007-12-10
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Agriculture uses large quantities of energy to pump groundwater for irrigation. This means the cost of energy has important implications for the industry in terms of costs and profitability. Increases in the prices of energy sources such as natural gas, electricity, liquid petroleum gas and diesel can cause economic hardship for irrigators, particularly if those increas....

By R. D. Lacewell,W. P. Patton--Texas Water Resources Institute--2007-12-10
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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 quality standard of "fishable, swimmable waters nationwide" by July 1, 1983 was set. Under section 208 of this law, each state was required t....

By C. R. Taylor,D. R. Reneau,B. L. Harris--Texas Water Resources Institute--2007-12-07
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Reliable estimates of the demand characteristics of irrigation water are crucial to successful water policy formulation in the West. Although various studies concerning irrigation water demand exist in the literature, most are somewhat limited in scope and present their results in varied forms. Thus, comparison of results presents a problem. This study follows a more co....

By B. R. Beattie,M. D. Frank--Texas Water Resources Institute--2007-12-07
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Agricultural production and associated economic effects of irrigation on the Texas High Plains are seriously threatened by a rapidly declining groundwater supply and a swift upward trend in energy costs. To optimize the amount of irrigation water to be applied during specified periods of the production process, a stochastic open-loop feedback control policy was built i....

By L. R. Zavaleta,R. D. Lacewell,C. R. Taylor--Texas Water Resources Institute--2007-12-07
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Public concern over the potential effects of energy price increases on the U.S. food and fiber system has been dramatically justified in the Trans Pecos region of Texas where a 450 percent increase in the price of natural gas was followed by the idling of thousands of irrigated acres and the departure of many of the farmers. This study was conducted to provide the answ....

By R. E. Whitson,K. Lindsey,D. C. Hardin,R. D. Lacewell,G. D. Condra--Texas Water Resources Institute--2007-12-07
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A study of the potential of using rapid response tensiometers to evaluate preplant irrigation was conducted at the Texas Agricultural Experiment Station, Lubbock and Halfway, Texas. Sites used for the study were an Olton loam soil at Lubbock and a Pullman clay loam at Halfway. Soil water potential was measured with both portable rapid response and permanently installed ....

By C. W. Wendt--Texas Water Resources Institute--2007-12-07
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Public Law 92-500 - the 1972 Federal Water Pollution Control Act Amendments - mandates the analysis of agricultural non-point source (NPS) pollution controls. This report presents the results of a study of the economic impact of implementing potential agricultural NPS pollution controls in the watershed above Lavon Reservoir. The study focuses on: (a) effects of erosion....

By B. L. Harris,D. R. Reneau,C. R. Taylor--Texas Water Resources Institute--2007-12-07
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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 quality standard of "fishable, swimmable waters nationwide" by July 1, 1983 was determined. Under section 208 of this law, each state was req....

By B. L. Harris,D. R. Reneau,C. R. Taylor--Texas Water Resources Institute--2007-12-07
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The development and implementation of agricultural non-point source (NPS) pollution control plans was mandated by the 1972 Federal Pollution Control Act Amendments, Public Law 92-500. The purpose of this particular report is to present the results of a study on the economic impact of implementing potential agricultural NPS pollution controls in Lower Running Water Draw ....

By P. E. Mueller,R. D. Lacewell,B. L. Harris,D. R. Reneau,C. R. Taylor--Texas Water Resources Institute--2007-12-07
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Section 208 of the 1972 Amendments to the Federal Water Pollution Control Act (Public Law 92-500) requires the states to develop plans which: (1) contain processes to identify nonpoint sources of pollution, and (2) set forth procedures and methods to control such sources of pollution to the extent feasible. Among the land use activities which are explicitly identified ....

By B. D. Jackson,C. A. Hickman--Texas Water Resources Institute--2007-12-07
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