Now showing items 2181-2200 of 3360

    • Neural Networks and Fuzzy Systems in Model Based Control of the Overwaard Polder 

      Arnold H. Lobbrecht; Yonas B. Dibike; Dimitri P. Solomatine (American Society of Civil Engineers, 2005)
      Recent developments in the field of computational intelligence (CI) techniques are helping to solve various problems of water resources modeling and management. These techniques have also shown their potential as an ...
    • Aquifer Management Zones Based on Simulated Surface-Water Response Functions 

      Donna M. Cosgrove; Gary S. Johnson (American Society of Civil Engineers, 2005)
      Conjunctive management of surface and ground water requires an understanding of the degree to which surface water resources will be impacted by aquifer stresses at different locations. Response functions quantify the rate ...
    • Impacts of Leaks on Energy Consumption in Pumped Systems with Storage 

      Andrew F. Colombo; Bryan W. Karney (American Society of Civil Engineers, 2005)
      A conceptual examination of the energy impact of leaks in systems with storage is undertaken. Consideration of how leakage is experienced at the pump is followed by an analysis of how different leakage levels alter energy ...
    • Decision Support for Watershed Management Using Evolutionary Algorithms 

      Misgana K. Muleta; John W. Nicklow (American Society of Civil Engineers, 2005)
      An integrative computational methodology is developed for the management of nonpoint source pollution from watersheds. The associated decision support system is based on an interface between evolutionary algorithms (EAs) ...
    • Coupling of Engineering and Biological Models for Ecosystem Analysis 

      John M. Nestler; R. Andrew Goodwin; Daniel P. Loucks (American Society of Civil Engineers, 2005)
      Robust ecosystem analysis of water resource systems remains elusive. A principle reason is the difficulty in linking engineering models used to simulate physicochemical processes associated with project design or operation ...
    • Hybrid Genetic Algorithm—Local Search Methods for Solving Groundwater Source Identification Inverse Problems 

      G. (Kumar) Mahinthakumar; Mohamed Sayeed (American Society of Civil Engineers, 2005)
      Identifying contaminant sources in groundwater is important for developing effective remediation strategies and identifying responsible parties in a contamination incident. Groundwater source identification problems require ...
    • Drought Allocations Using the Systems Impact Assessment Model: Klamath River 

      Marshall Flug; Sharon G. Campbell (American Society of Civil Engineers, 2005)
      Water supply and allocation scenarios for the Klamath River, Ore. and Calif., were evaluated using the Systems Impact Assessment Model (SIAM), a decision support system developed by the U.S. Geological Survey. SIAM is a ...
    • Water Distribution Systems Connectivity Analysis 

      Avi Ostfeld (American Society of Civil Engineers, 2005)
      A water distribution system is a collection of hydraulic control elements jointly connected to convey quantities of water from sources to consumers. Such a system can be described as a graph with the nodes representing the ...
    • Acts of Nature and Potential Acts of Terrorists: Contrast Relative to Water Resource Systems 

      Nicholas C. Matalas (American Society of Civil Engineers, 2005)
    • Contamination Source Determination for Water Networks 

      Carl D. Laird; Lorenz T. Biegler; Bart G. van Bloemen Waanders; Roscoe A. Bartlett (American Society of Civil Engineers, 2005)
      We formulate and solve an estimation problem for identifying both the time and location of contamination sources in municipal water networks using concentration measurements from a sparse sensor grid. Previous work showed ...
    • Optimal Design and Operation of Multiquality Networks under Unsteady Conditions 

      Avi Ostfeld (American Society of Civil Engineers, 2005)
      A method incorporating a genetic algorithm tailored to EPANET for the conjunctive optimal design and operation of multiquality water distribution systems under unsteady hydraulics is presented and demonstrated. The objective ...
    • Optimal In Situ Bioremediation Design by Hybrid Genetic Algorithm-Simulated Annealing 

      Horng-Jer Shieh; Richard C. Peralta (American Society of Civil Engineers, 2005)
      Presented is a simulation/optimization (S/O) model combining optimization with
    • CalSim: Generalized Model for Reservoir System Analysis 

      Andrew J. Draper; Armin Munévar; Sushil K. Arora; Erik Reyes; Nancy L. Parker; Francis I. Chung; Lloyd E. Peterson (American Society of Civil Engineers, 2004)
      The California State Department of Water Resources and the United States Bureau of Reclamation Mid-Pacific Region have developed a general-purpose reservoir–river basin simulation model for the planning and management of ...
    • Conditional Reliability Modeling of Short-Term River Basin Management 

      A. Andres Salazar; Ralph A. Wurbs (American Society of Civil Engineers, 2004)
      A conditional reliability model (CRM) is presented for assessing reliabilities for meeting water needs over the next several months, conditioned upon current reservoir storage contents. The CRM procedure was developed in ...
    • Downstream Economic Benefits from Storm-Water Management 

      John B. Braden; Douglas M. Johnston (American Society of Civil Engineers, 2004)
      Using benefits transfer methods, this paper assesses the downstream economic consequences of development designs that promote greater on-site water retention. It concludes that on-site retention provides many services that ...
    • Reviewers 

      Unknown author (American Society of Civil Engineers, 2004)
    • Reliability-Based Approach to Multicriteria Decision Analysis for Water Resources 

      Kylie M. Hyde; Holger R. Maier; Chris B. Colby (American Society of Civil Engineers, 2004)
      Analyses of water resource allocation problems can be undertaken using multicriteria decision analysis (MCDA), yet various sources of uncertainty exist in the application of MCDA methods, including the definition of criteria ...
    • Adaptive Hybrid Genetic Algorithm for Groundwater Remediation Design 

      Felipe P. Espinoza; Barbara S. Minsker; David E. Goldberg (American Society of Civil Engineers, 2005)
      Optimal groundwater remediation design problems are often complex, nonlinear, and computationally intensive. Genetic algorithms allow solution of more complex nonlinear problems than traditional gradient-based approaches, ...
    • Multiobjective Optimization for Sustainable Groundwater Management in Semiarid Regions 

      James McPhee; William W.-G Yeh (American Society of Civil Engineers, 2004)
      Increasing demands for water by competing users in semiarid regions pose new challenges for water resources managers. Decision makers must understand the interactions between surface water, groundwater, and the environmental ...
    • Classifier System for Rule-Based Operation of Canal Gates 

      S. Chittaladakorn; G. P. Merkley (American Society of Civil Engineers, 2005)
      A classifier system for automatic operation of canal gates was developed and tested through simulation modeling. The classifier system manipulates a population of rules that are trained to “learn” appropriate operational ...