Now showing items 61-80 of 753

  • Irrigation Water Management for the Texas High Plains: A Research Summary 

    Jordan, Wayne R.; Sweeten, John M. (Texas Water Resources Institute, 1987-08)
    The four main crops produced in the Texas High Plains have been the subject of water management research for several decades by the Texas Agricultural Experiment Station and the USDA/Agricultural Research Service. As ...
  • Preliminary Investigation of Tracer Gas Reaeration Method for Shallow Bays 

    Holley, Edward R.; Baker, Sarah H. (Texas Water Resources Institute, 1987-08)
    Accurate estimates of surface exchange rates for volatile pollutants in bays are needed to allow predictions of pollutant movement and retention time. The same types of estimates can be used to calculate reaeration rates. ...
  • Forecasting Water Use in Texas Cities 

    Maidment, David R.; Shaw, Douglas T. (Texas Water Resources Institute, 1987-08)
    In this research project, a methodology for automating the forecasting of municipal daily water use is developed and implemented in a microcomputer program called WATCAL. An automated forecast system is devised by modifying ...
  • An Analysis of the Effects of Sociodemographic Factors on Daily Per Capita Residential Water Use in Texas Cities 

    Parpia, Banoo; Bachman, Kenneth; Hamm, Rita R.; Albrecht, Don E.; Murdock, Steve H. (Texas Water Resources Institute, 1988-02)
    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. ...
  • Furrow Diking Technology for Agricultural Water Conservation and its Impact on Crop Yields in Texas 

    Arkin, Gerald F.; Krishna, J. Hari (Texas Water Resources Institute, 1988-07)
    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 ...
  • Hydrologic and Institutional Water Availability in the Brazos River Basin 

    Walls, W. Brian; Carriere, Patrick E.; Bergman, Carla E.; Wurbs, Ralph A. (Texas Water Resources Institute, 1988-08)
    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 ...
  • Evaluation of Storage Reallocation and Related Strategies for Optimizing Reservoir System Operations 

    Carriere, Patrick E.; Wurbs, Ralph A. (Texas Water Resources Institute, 1988-08)
    Statement of the Problem Rapid population and economic growth combined with depleting groundwater reserves are resulting in ever increasing demands on surface water resources in Texas, as well as elsewhere. The climate ...
  • Community Water Demand in Texas 

    Chang, Chan; Griffin, Ronald C. (Texas Water Resources Institute, 1989-04)
    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 ...
  • Stochastic Modeling of the Rainfall Runoff-Process for Nonpoint Source Pollutant Load Estimation 

    Dickey, Roger O.; Collins, Michael A. (Texas Water Resources Institute, 1989-12)
    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 ...
  • Freshwater Community Responses to Mixtures of Agricultural Pesticides: Synergistic Effects of Atrazine and Bifenthrin 

    Drenner, Ray W.; Hoagland, Kyle D. (Texas Water Resources Institute, 1991-04)
    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 ...
  • On Managing Texas Rural Water Supply Systems: A Socioeconomic Analysis and Quality Evaluation 

    Singh, R.N. (Texas Water Resources Institute, 1991-05)
    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. ...
  • Particles in Surface Waters: Coagulation and Transport 

    Lawler, Desmond F.; Culkin, Gerald W. (Texas Water Resources Institute, 1991-08)
    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' ...
  • Acute and Genetic Toxicity of Municipal Landfill Leachate 

    Donnelly, K.C.; Schrab, G.E.; Brown, K.W. (Texas Water Resources Institute, 1991-10)
    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 ...
  • Sediment Transport in the Lower Guadalupe and San Antonio Rivers 

    Holley, Edward R. (Texas Water Resources Institute, 1992-01)
    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 ...
  • Economic Impact of Withdrawing Specific Agricultural Pesticides in the Lower Rio Grande Valley 

    Bremer, John E.; Sparks, Alton N.; Norman, John W.; Robinson, John R.C.; Lacewell, Ronald D.; Bryant, Kelly J. (Texas Water Resources Institute, 1993-01)
    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 ...
  • Economic and Hydrologic Implications of Proposed Edwards Aquifer Management Plans 

    Dillon, Carl R.; Jones, Lonnie L.; Williams, R. Lynn; Jordan, Wayne R.; McCarl, Bruce A. (Texas Water Resources Institute, 1993-03)
    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 ...
  • The Edwards Aquifer: An Economic Perspective 

    Merrifield, John D.; McCarl, Bruce A.; Griffin, Ronald C.; Emerson, Peter M.; Collinge, Robert A. (Texas Water Resources Institute, 1993-03)
    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 ...
  • The Expanding Dairy Industry: Impact on Ground Water Quality and Quantity with Emphasis on Waste Management System Evaluation for Open Lot Dairies 

    Wolfe, Mary Leigh; Sweeten, John M. (Texas Water Resources Institute, 1993-08)
    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 ...
  • Natural Salt Pollution and Water Supply Reliability in the Brazos River Basin 

    Ganze, C. Keith; Saleh, Ishtiaque; Karama, Awes S.; Wurbs, Ralph A. (Texas Water Resources Institute, 1993-08)
    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, ...
  • A Lumped Parameter Model for the Edwards Aquifer 

    Anaya, Roberto; Wanakule, Nisai (Texas Water Resources Institute, 1993-09)
    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 ...