Now showing items 2341-2360 of 3360

    • Efficient Multiscale Methods for Optimal In Situ Bioremediation Design 

      Yong Liu; Barbara S. Minsker (American Society of Civil Engineers, 2002)
      This paper presents a multiscale derivative method for solving a successive approximation linear quadratic regulator model for optimal in situ bioremediation design. An efficient one-sided forward divided difference numerical ...
    • Runoff Capture and Delivery Curves for Storm-Water Quality Control Designs 

      James C. Y. Guo; Ben Urbonas (American Society of Civil Engineers, 2002)
      A storm-water quality control system consists of trickle channels and water quality control basins (WQCB). To be economical, a WQCB is often designed to capture rainfall events smaller than extreme events. In current ...
    • Averting a California Water Crisis 

      Francis Chung; Katherine Kelly; Kamyar Guivetchi (American Society of Civil Engineers, 2002)
    • Spatial Decision Support System for Integrated River Basin Flood Control 

      Kyu-Cheoul Shim; Darrell G. Fontane; John W. Labadie (American Society of Civil Engineers, 2002)
      A prototype spatial decision support system (SDSS) is presented for integrated, real-time river basin flood control in a multipurpose, multireservoir system. The SDSS integrates a geographic information system with a ...
    • Rapid Assessment of Water Systems based on Internal Consistency 

      J. L. de Kok; H. G. Wind (American Society of Civil Engineers, 2002)
      Integrated water management is becoming increasingly complex, with decision makers faced with interacting socioeconomic, ecological, and physical processes, affecting the outcome of management strategies. The spatial and ...
    • Nutrient and Solids Controls in Virginia’s Chesapeake Bay Tributaries 

      Carl F. Cerco; Lewis Linker; Jeffrey Sweeney; Gary Shenk; Arthur J. Butt (American Society of Civil Engineers, 2002)
      A model package including a watershed model, an atmospheric loading model, a hydrodynamic model, and a eutrophication model are used to evaluate the benefit of nutrient and solids load controls on the Virginia tributaries ...
    • Floodplain Planning with Risk-Based Optimization 

      Jay R. Lund (American Society of Civil Engineers, 2002)
      Economical integration of permanent and emergency flood control options is a long-standing problem in water resources planning and management. A two-stage linear programming formulation of this problem is proposed and ...
    • Optimal Aquifer Dewatering Schemes for Excavation of Collector Line 

      Mehmet Tokgoz; Koray K. Yilmaz; Hasan Yazicigil (American Society of Civil Engineers, 2002)
      Groundwater flow modeling and optimization techniques are used jointly to determine the optimal dewatering system design for a trench type excavation (with 3,000 m total length) to be opened below the groundwater table in ...
    • Reliability/Availability Analysis of Municipal Water Distribution Networks: Case Studies 

      Debbie S. Shinstine; Iftekhar Ahmed; Kevin E. Lansey (American Society of Civil Engineers, 2002)
      Reliability/availability analyses are performed on two large-scale municipal water distribution networks in the Tucson Metropolitan Area in Arizona. Reliability is defined as the probability of satisfying nodal demands and ...
    • Expert System for Prioritizing the Inspection of Sewers: Knowledge Base Formulation and Evaluation 

      Margaret A. Hahn; Richard N. Palmer; M. Steve Merrill; Andrew B. Lukas (American Society of Civil Engineers, 2002)
      This paper describes the development of the knowledge base expert system denoted as Sewer Cataloging, Retrieval and Prioritization System. This computer support system prioritizes sewer pipeline inspections used to target ...
    • Parting the Waters 

      Kader Asmal (American Society of Civil Engineers, 2002)
    • Network Flow Optimization Model for Basin-Scale Water Supply Planning 

      Nien-Sheng Hsu; Ker-Wei Cheng (American Society of Civil Engineers, 2002)
      This paper develops a generalized network flow optimization model for long-term supply-demand analysis for basin-wide water resources planning. A set of nodes and arcs are used to form the network, and the decision variables ...
    • Multicriteria Siting and Sizing of Desalination Facilities with Geographic Information System 

      Mohamed Rami Mahmoud; Hussam Fahmy; John W. Labadie (American Society of Civil Engineers, 2002)
      Desalination of sea and brackish water is gaining interest as a viable water source in several arid regions of the world where limited freshwater resources are under stress from increasing demands and deteriorating water ...
    • Two-Dimensional Modeling of Floods to Map Risk-Prone Areas 

      Angelo Leopardi; Elisa Oliveri; Massimo Greco (American Society of Civil Engineers, 2002)
      The assessment of flood risk is a difficult task and usually requires solution of a flood routing problem as a part of the assessment. Due to the large number of scenarios that have to be developed and analyzed, simplified ...
    • Predicting Chlorine Residuals in Drinking Water: Second Order Model 

      Robert M. Clark; Mano Sivaganesan (American Society of Civil Engineers, 2002)
      A major objective of drinking water treatment is to provide water that is both microbiologically and chemically safe for human consumption. Drinking water chlorination, therefore, poses a dilemma. Chemical disinfection ...
    • Determining Pipe Groupings for Water Distribution Networks 

      Keshaw N. Mallick; Iftekhar Ahmed; Kevin S. Tickle; Kevin E. Lansey (American Society of Civil Engineers, 2002)
      Mathematical modeling of a water distribution system allows comparisons between design and operation alternatives. However, to make meaningful comparisons, the true field system must be represented within the model. Water ...
    • Economic Value of Long-Lead Streamflow Forecasts for Columbia River Hydropower 

      Alan F. Hamlet; Daniel Huppert; Dennis P. Lettenmaier (American Society of Civil Engineers, 2002)
      Recent advances in long-lead climate forecasting have made it possible to produce useful streamflow forecasts for the Columbia River basin roughly six months earlier than current forecasts that rely on snowpack measurements. ...
    • Threats on Tap: Understanding the Terrorist Threat to Water 

      Peter S. Beering (American Society of Civil Engineers, 2002)
    • Hydrologic Regionalization of Watersheds. I: Methodology Development 

      Shih-Min Chiang; Ting-Kuei Tsay; Stephan J. Nix (American Society of Civil Engineers, 2002)
      A hydrologic regionalization scheme is proposed for classification of watersheds at gauged sites. This scheme used 16 streamflow parameters estimated by a time series model to classify 94 watersheds into 6 regions by cluster ...
    • Southern California Water Markets: Potential and Limitations 

      Brad D. Newlin; Marion W. Jenkins; Jay R. Lund; Richard E. Howitt (American Society of Civil Engineers, 2002)
      This paper explores the potential and limitations for southern California water markets using an economic-engineering network flow optimization model, CALVIN. CALVIN is used to estimate how a market would affect overall ...