Browsing Technical and Special Reports by Issue Date

Now showing items 41-60 of 510

    • A Model for a Linked System of Multi-Purpose Reservoirs with Stochastic Inflows and Demands 
      Curry, G. L.; Helm, J. C.; Clark, R. A. (Texas Water Resources Institute, 1972-06)
      In Chapter I of this report a model of a single multi-purpose reservoir with stochastic inflows is addressed. The objective of the model is the development of an optimal operating policy for given time sequence of minimum ...
    • Water Use Efficiency in Plant Growth and Ambient Carbon Dioxide Level 
      van Bavel, C. H. M. (Texas Water Resources Institute, 1972-06)
      This report examines the validity and explores the practical implications of the proposition that CO2 enrichment of the leaf environment enhances plant growth and, simultaneously decreases plant water use. A theoretical ...
    • The Composition and Distribution of the Fish Fauna of the Navasota River 
      Strawn, R. K.; Clark, W.J. (Texas Water Resources Institute, 1972-08)
      Twenty-one thousand fish representing 9 orders, 14 families and 56 species were collected from various habitats of the Navasota River drainage. Some species such as Notropis lutrensis, Gambusia affinis and Lepomis macrocllirlls ...
    • An Investigation of Hydrological Aspects of Water Harvesting 
      Wilke, O.; Runkles, J.; Wendt, C. (Texas Water Resources Institute, 1972-09)
      Water harvesting is a potential source of water for arid and semiarid lands. The objectives of this study were to determine combinations of land surface treatments and land forming which result in efficient but inexpensive ...
    • Mathematical Models of Water Quality Parameters for Rivers and Estuatries 
      Hann Jr., R. W.; Young, P. J. (Texas Water Resources Institute, 1972-10)
      Estuaries represent an economically and biologically important part of our coast. These bodies of water are used as permanent homes or nursery grounds for many of the important forms of marine life. Estuaries also provide ...
    • Identification of Water Resources Planning Problems in the Metropolitan Area of Greater San Antonio and its Associated Counties 
      Garner, J. K.; Shih, C. S. (Texas Water Resources Institute, 1973)
      Growth in population and economic activity has been accepted as the essential elements of American life for almost two centuries. Since the beginning of the seventies, we have begun to concern ourselves with the quality ...
    • The Texas Water Plan and its Institutional Problems 
      Jensen, C. W.; Trock, W. L. (Texas Water Resources Institute, 1973-01)
      An expansion of tile supply of water and greater efficiency in its use are necessary for the future economic development of the state of Texas. Imported water, supplemental to that available in the state, is an important ...
    • An Economic Evaluation of a Water-Based Urban Tourist Attraction in San Antonio, Texas 
      Trock, W. L.; Lacewell, R. D. (Texas Water Resources Institute, 1973-04)
      The importance of an economic study of the Paseo del Rio (a highly developed portion of the San Antonio River) has greatly increased with the proposal of many extensions, each of which will involve large investment. That ...
    • Methodology for Assesment of Urban Water Planning Objectives 
      Meier, W. L.; Thornton, B. M. (Texas Water Resources Institute, 1973-06)
      One of the most perplexing problems in the United States today is concerned with providing the public services required in rapidly-expanding urban areas. A substantial portion of the total public service problem in the ...
    • Stochastic Models Applied to Operation of Reservoirs in the Upper Colorado River Basin in Texas 
      Clark, R. A.; O'Connor, G. E.; Curry, G. L.; Helm, J. C. (Texas Water Resources Institute, 1973-06)
      A hydrometeorological model is presented that utilizes 30-day meteorological forecasts of temperature and precipitation issued every 15 days by the National Weather service to provide an estimate of the future hydrometeorological ...
    • Development of a Dynamic Water Management Policy for Texas 
      Meier, W. L.; Helm, J. C.; Curry, G. L. (Texas Water Resources Institute, 1973-06)
      The purpose of this investigation was to develop techniques to assist water planners in the optimum implementation of their plans. Specifically, techniques useful for continual evaluation of water plans and for scheduling ...
    • Water Quality Hydrology of Lands Receiving Farm Animal Wastes 
      Reddell, R. D.; Wise, G. G.; Peters, R. E.; Lyerly, P. J. (Texas Water Resources Institute, 1973-06)
      A significant pollution potential from cattle manure has developed as a result of the cattle feeding industry progressing to large, high density feeding operations. Two major potential sources of pollution from beef feedlots ...
    • An Evaluation of OBERS Projections of Texas Agricultural Production in 1980, 2000 and 2020 
      Warren, J. P.; Griffin, W. L.; Trock, W. L. (Texas Water Resources Institute, 1973-08)
      It seems possible, perhaps even likely, that some errors of fact and/or judgment may have been made in the process of allocation of national requirements among states. There may be instances where data are inadequate for ...
    • Decision Analysis on Water Resources Planning and Management for an Arid Metropolitan Center in West Texas 
      Shih, C. S.; Dean, J. H. (Texas Water Resources Institute, 1973-10)
      The demand by consumers for public-owned low-priced natural resources is essentially insatiable. When natural resources become scarce the public is agonized by the problem of making an optimum choice or choices from feasible ...
    • The Ecology of the Navasota River, Texas 
      Clark, W. J. (Texas Water Resources Institute, 1973-12)
      A general Limnological Survey was made of the Navasota River, Texas, a tributary of the Brazos River, between February, 1968 and March, 1970. Five stations on the main channel were visited twice monthly from February, 1968 ...
    • Alternate Solutions to Water Resource Development -- A Case Study 
      Basco, D. R.; Rahman, K. M. A. (Texas Water Resources Institute, 1974-05)
      This study was undertaken in an effort to develop procedural methodology for the consideration of alternative solutions for water resources development in a short period of time with a view toward reduction of total costs ...
    • Development of Criteria for Evaluating Urban River Settings for Tourism-Rereation Use 
      Gunn, C. A.; Hanna, J. W.; Parenzin, A. J.; Blumberg, F. M. (Texas Water Resources Institute, 1974-06)
      An earlier study, Cultural Benefits from Metropolitan River Recreation--San Antonio Prototype, (Gunn, et al., 1972), revealed that urban water resources can be successfully developed for tourism and recreation. The San ...
    • Costs of Land Subsidence Due to Groundwater Withdrawal 
      Warren, J. P.; Jones, L. L.; Griffin, W. L.; Lacewell, R. D. (Texas Water Resources Institute, 1974-07)
      In recent years the area around Houston and Baytown, Texas, has been affected to an increasing degree by land subsidence. Sinking of the land surface has reached critical proportions in many areas, and subsidence of as ...
    • Value of Irrigation Water with Alternative Input Prices, Product Prices and Yield Levels: Texas High Plains and Rio Grande Valley 
      Lacewell, R. D.; Sprott, J. M.; Beattie, B. R. (Texas Water Resources Institute, 1974-08)
      Agriculture is a major income generating sector of the Texas economy. Irrigated agriculture is an important part of Texas agriculture and an "adequate" water supply is important in maintaining a viable agriculture. Irrigation ...
    • An Investigation of the Return Flow from Irrigated Land 
      Brown, K. W.; Gerard, C. J.; DeMichele, D. W.; Sharpe, P. J. H.; Hipp, B. W. (Texas Water Resources Institute, 1974-09)
      Recent trends in agricultural have lead to the intensification of crop production in areas with long growing seasons and ample solar radiation. Unfortunately, these areas also often have limited water supplies, and the ...