Simplification of Detailed Models of Water Distribution Systems Obtained from GIS Systems
For a long time simplified models have been used to simulate the behaviour of large water distribution networks. Often, simplification has been carried out by removing small diameter pipes...
Urban Runoff Toxicity
Toxicity is controlled by the magnitude/concentration of the contaminant produced in an exposure, the duration of the exposure, and the frequency with which exposures are repeated. When...
A Decision Support System for Assisting Operation of Artificial Recharge Systems
A series of simulation and optimization models analyzing artificial recharge systems have been linked within a decision support system (DSS) with a graphical interface. The model includes...
A Review of Established Water Markets and Quasi-Water Markets
This presentation provides a review of established institutional mechanisms which regulate the transfer of water withdrawal rights. Each method of water rights transfer is evaluated in...
Integration of SWMM and ARCVIEW GIS for Interactive Decision Support
(No paper) This paper covers the integration of the EPA SWMM runoff model and ESRI's ArcView GIS for utilization by the City of Phoenix for decision support concerning land use changes...
A GIS-Based Interactive Decision Making Tool for Watershed Management
(No paper) BASINS?Better Assessment Science Integrating Point and Nonpoint Sources, a geographical information system- (GIS-) based tool developed and released by the US EPA, provides...
Friction Factor Choice in Hydraulic Simulation Models: Does It Matter?
(no paper) To model water distribution systems using computer hydraulic simulation, a user is required to select a form of head loss-flow relationship for each pipe in the network. The...
Evaluation of Two-Species Model for Chlorine Decay and THM Formation under Rechlorination Conditions
(No paper) Typically, chlorine decay has been described by a first-order decay model. The first-order model, however, has two drawbacks: 1) the reactive species within the water is assumed...
Sensitivity of Stormwater Conveyance System Cost to Design Recurrence Interval
(No paper) The cost of a piped and/or swaled stormwater system is determined principally by the storm recurrence interval (e.g., 5-year design storm) used to design it. That is, the present...
A Leadtime Driven Flood Warning Response Plan Design
(No paper) The paper examines the optimal combination of predictive and detective capabilities in the development of the Wickenburg Flood Response Plan and extrapolates those findings...
Chaotic Slackwater: A Journey Into the Science of Chaos as a Means to Understanding the Parallels between How We Manage Our Organizations and Natural Ecosystems
(No paper) From the ice age to slackwater, the Columbia River continues to ebb and flow through our lives. This paper will explore the ebb and flow between natural and human ecosystems....
Title Transfer of U.S. Bureau of Reclamation Projects: Fact or Fiction
(No paper) The U.S. Bureau of Reclamation (Reclamation) has constructed hundreds of water storage and delivery projects throughout the 17 western United States. These projects vary in...
Salinity Trends in the Amistad Reservoir of the Rio Grande
(No paper) The Rio Grande River is a vital resource to the hundreds of thousands of inhabitants of the Texas-Mexico border. Different sections of the river are experiencing trends of increasing...
Evaluating Alternatives for Capacity Expansion: Ensuring Reliable Water for the Portland, Oregon, Area
(No paper) The Portland Water Bureau is currently evaluating its water supply expansion alternatives. Like many water bureaus responsible for supplying water to both in-city customers...
Comparison of Complete Modeling/Simplified Modeling of Zaragoza City Water Supply Network
(No paper) Zaragoza is a Spanish city with 600.000 inhabitants and a water supply network of 900km long. The Council technical services uses a Microstation based GIS, GRED, for network...
Main Line Mending
Both the Washington Suburban Sanitary Commission (WSSC), of Laurel, Maryland, and the Providence Water Supply Board, of Rhode Island, are conducting massive, multimillion-dollar rehabilitation...
Relining a Relic
By the mid-1980s most of the Boston Low Service water supply network had been in operation for more than 100 years�with little regular maintenance. Many of the system's air...
Towering Over Xiamen (Available in Structural Engineering Special Issue only)
Composite structural systems are rapidly becoming the preferred choice for high-rise buildings, due to their high strength and stiffness, large ductility, and convenient, economical construction....
Environmental Engineering '99
This proceedings,
Evaluation of the ISOGRID Retaining Wall System
Prepared by the Highway Innovative Technology Evaluation Center, a CERF service center. This report presents the results of a HITEC evaluation of the...
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