Now showing items 2701-2720 of 3360

    • Climate-Related Fluctuations in Midwestern Floods during 1921–1985 

      Stanley A. Changnon; Kenneth E. Kunkel (American Society of Civil Engineers, 1995)
      Historical records of warm- and cold-season floods and associated heavy-precipitation events during 1921–1985 in the Midwest were examined for temporal fluctuations and trends. Floods in basins in the northern Midwest ...
    • Estuary Management by Stochastic Linear Quadratic Optimal Control 

      Bing Zhao; Larry W. Mays (American Society of Civil Engineers, 1995)
      A new type of estuary-management model based on discrete-time stochastic linear quadratic optimal control is presented. It is a feedback-control model that enables decision makers to determine the upstream reservoir releases ...
    • Estimation of Peak Discharge Using GIUH Model in Saudi Arabia 

      A. U. Sorman (American Society of Civil Engineers, 1995)
      Many of the basins, called wadis, in the Kingdom of Saudi Arabia lack long records of hydrologic data. Most of these wadis located in the southwestern part of the Kingdom are under flooding danger for every 5–10 yr return ...
    • Developing Comprehensive State Ground-Water-Protection Programs 

      R. Gregory Bourne; Sonja Massey; Elizabeth Rolle; Bruce Meighen (American Society of Civil Engineers, 1995)
      The U.S. Environmental Protection Agency (EPA) has developed a new approach to achieving national ground-water-protection goals, giving states primary responsibility for coordinating all activities associated with ground-water ...
    • Global-Warming Effects on New York Streamflows 

      Ching-Pin Tung; Douglas A. Haith (American Society of Civil Engineers, 1995)
      Impacts of global warming on streamflows were estimated for four large watersheds in New York State using a daily streamflow model. Three different 100-yr daily weather sequences were input to the model. The first was ...
    • Criteria for Evaluating State Instream-Flow Programs: Deciding What Works 

      Berton Lee Lamb (American Society of Civil Engineers, 1995)
      Most states have adopted some form of instream-flow–protection program. These programs are of three types: instream-flow water rights; reservations of water for instream purposes; and conditions on consumptive water rights. ...
    • Nonlinear Heuristic for Pump Operations 

      Lindell E. Ormsbee; Srinivasa L. Reddy (American Society of Civil Engineers, 1995)
      A nonlinear heuristic is developed for use in obtaining least-cost pump-operation policies for multisource, multitank water-distribution systems. The proposed algorithm links a minimum-cost-constraint identification ...
    • Hydraulic-Network Simplification 

      Edward J. Anderson; Khairy H. Al-Jamal (American Society of Civil Engineers, 1995)
      This paper illustrates a methodology for the simplification of complicated hydraulic networks. The aim is to create a small hydraulic network that will in certain ways mimic the behavior of a larger network. The approach ...
    • Water Supplies versus Demand in Countries of Arabian Peninsula 

      M. J. Abdulrazzak (American Society of Civil Engineers, 1995)
      Rapid economic development in the countries of the Arabian Peninsula has resulted in a substantial imbalance between the available water resources and demand. Demand has increased from 5.95 billion to 22.6 billion m
    • Risk-Equivalent Seasonal Discharge Programs for Ice-Covered Rivers 

      Corinne L. Wotton; Barbara J. Lence (American Society of Civil Engineers, 1995)
      Seasonal waste discharge (SWD) programs allow different waste-discharge rates during different seasons of the year and reduce the cost of waste treatment. The efficiency of such programs for managing biochemical oxygen ...
    • Sensitivity of Reservoir-Yield Estimates to Model Time Step Surface-Moisture Fluxes 

      Neil M. Fennessey (American Society of Civil Engineers, 1995)
      Determining the yield from a storage reservoir typically requires estimating the contribution to storage by precipitation and the loss of water by free-surface evaporation over time, among other factors. Due to the difficulty ...
    • Validation of Water-Quality Model for Seneca River, N.Y. 

      Raymond P. Canale; Emmet M. Owens; Martin T. Auer; Steven W. Effler (American Society of Civil Engineers, 1995)
      The validation of a water-quality model for the Seneca River, a deep, stratifying, slow-moving river located in central New York, is documented. Model validation is supported by comprehensive field monitoring and kinetic ...
    • Planned Operation of Large-Scale Water-Distribution System 

      Ali Diba; Peter W. F. Louie; Manouchehr Mahjoub; William W-G. Yeh (American Society of Civil Engineers, 1995)
      A water-supply-distribution-system planning model has been developed using a directed graph algorithm as its pre- and postprocessors and a linear programming (LP) procedure as an “intelligent” system operator at its core. ...
    • Optimization Modeling for Sedimentation in Alluvial Rivers 

      Carlos C. Carriaga; Larry W. Mays (American Society of Civil Engineers, 1995)
      Mathematical models are developed for determining optimum reservoir releases in order to minimize the aggradation and degradation in downstream river reaches. The physical system is composed of a reservoir-river interaction ...
    • Discussion and Closure: Prediction of River Discharge at Ungaged Sites with Analysis of Uncertainty 

      Krishan P. Singh; Robert E. Murdock; John S. Gulliver (American Society of Civil Engineers, 1995)
    • Conditional Frequency Analysis of Autocorrelated Lake Levels 

      Steven G. Buchberger (American Society of Civil Engineers, 1995)
      In contrast to annual peak river flows, annual maximum lake levels often possess significant autocorrelation. The presence of autocorrelation in the time series of annual lake floods can be exploited to generate conditional ...
    • Yield Model for Screening Surface- and Ground-Water Development 

      Upmanu Lall (American Society of Civil Engineers, 1995)
      An optimization model is developed for selecting between candidate surface-water reservoirs and ground-water development. The model may be used to perform a preliminary screening of alternatives for water-supply development, ...
    • Shortage Indices for Water-Resources Planning in Taiwan 

      Shiang-Kueen Hsu (American Society of Civil Engineers, 1995)
      Water shortage is a major socioeconomic problem facing society today. From the viewpoint of water-resources planning, an effective water-shortage index should capture such basic characteristics as its frequency, intensity, ...
    • Peak Outflow from Breached Embankment Dam 

      David C. Froehlich (American Society of Civil Engineers, 1995)
    • Alternative Formulations for Optimal Ground-Water Remediation Design 

      Yanyong Xiang; Jonathan F. Sykes; Neil R. Thomson (American Society of Civil Engineers, 1995)
      This paper presents alternative formulations of optimal pumping design for contaminated ground-water cleanup. Remediation-efficiency indicators are proposed for evaluating well performances in terms of contaminant removal. ...