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In Part 1 of this paper, the theoretical models, integrating the fan airflow, fan head, air leakage factors, are developed to analyze the impacts of the static pressure reset on both pressure dependent and pressure independent terminal boxes. In this part, a simulated air handling unit (AHU) system in Omaha NE is used to demonstrate the energy savings performance in one....

By M. Liu,K. Zheng,L. Wu,Z. Wang,C. Johnson--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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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 has been reported in the published literature regarding modeling reservoir system operations and evaluating water supply relia....

By David D. Dunn,Gerardo Sanchez-Torres,Ralph A. Wurbs--Texas Water Resources Institute--2007-11-30
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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 university, state, and federal data bases for the region; 2. to inventory research and analytical capabilities; and 3. to ....

By Wayne R. Jordan,Howard A. Malstrom--Texas Water Resources Institute--2007-11-30
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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 facilities. Despite this extensive water management system, water supply remains a concern because of increasing populations a....

By Ronald A. Kaiser--Texas Water Resources Institute--2007-11-30
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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 practices and implications of different policies on nitrate percolation and associated loss of net returns. In the absence of ....

By Paul T. Dyke,Billy L. Harris,Verel W. Benson,Teofilo Jr. Ozuna,Bruce A. McCarl,Ron Lacewell--Texas Water Resources Institute--2007-11-30
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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 Antonio in the central portion and provides for spring flow-based recreation and municipal water supply in the eastern part of t....

By Carl R. Dillon,Lonnie L. Jones,R. Lynn Williams,Wayne R. Jordan,Bruce A. McCarl--Texas Water Resources Institute--2007-11-30
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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 symptoms of the problem without curing the cause. Available evidence regarding water development also indicates that these stra....

By John D. Merrifield,Bruce A. McCarl,Ronald C. Griffin,Peter M. Emerson,Robert A. Collinge--Texas Water Resources Institute--2007-11-30
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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. An improved understanding of why water and solute follow particular flow paths is needed to identify soils that allow agricult....

By C. Tom Hallmark,Larry P. Wilding,Kevin J. McInnes,Willem J. Heuvelman--Texas Water Resources Institute--2007-11-30
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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 parameter model was formulated using a discrete, nonlinear, nonstationary system based on control theory. The physical system of t....

By Roberto Anaya,Nisai Wanakule--Texas Water Resources Institute--2007-11-30
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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 densities on pastures except during milking operations. Today, however, new dairy operations are typically much larger (500-1,000 ....

By Mary Leigh Wolfe,John M. Sweeten--Texas Water Resources Institute--2007-11-30
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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 water quality. The field site was in Austin, Texas with runoff originating in a parking lot with a drainage area of approximate....

By Thomas L. Thurow,Mary Leigh Wolfe,Roger H. Glick--Texas Water Resources Institute--2007-11-30
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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 the environment from contamination of ground water. In February, 1988, EPA proposed a strategy where by they would regulate cer....

By John E. Bremer,Alton N. Sparks,John W. Norman,John R.C. Robinson,Ronald D. Lacewell,Kelly Bryant--Texas Water Resources Institute--2007-11-30
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