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...
Adjustments to Short-Term Hydrologic Forecasts for Conceptual Models of Hydrologic Processes
(No paper) Real-time forecasting of streamflows is amorphous and multi-dimensional. Weather forecasts, which are synonymous in popular culture with uncertainty, are just one component...
Long-Term Streamflow Forecasting
(No paper) Technology is creating major impacts on water management decisions dynamics. Today emerging technologies, such as satellite rely of hydrological and meteorological data, improvement...
Water Resource Systems and Modeling of the Lower Virgin River Using EXCEL
(No paper) The first objective of this study was to determine the availability of water at the confluence of the Halfway Wash and the Virgin River and to simulate the diversion of river...
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...
River Replication
In 1997 a U.S. patent was granted to the U.S. Army Corps of Engineers for a new applied engineering tool and methodology called micromodeling, which uses a small-scale physical model to...
A Safer Route
More than 42,000 people died in transportation-related incidents in 1997, making motor vehicle accidents the leading cause of death for individuals between age one and 34. Engineers are...
Enduring Elegance (Available in Structural Engineering Special Issue only)
Every architect who designs for earthquake-prone areas wants to create an elegant aesthetic form despite the limitations of seismic considerations. The San Francisco International Airport's...
GIS Modules and Distributed Models of the Watershed
Prepared by the Task Committee on GIS Modules and Distributed Models of the Watershed of ASCE. This report guides professionals in selecting the mostadvantageous...
Electrical Explorations (Available in Geo-Environmental Special Issue only)
Recent advances in state-of-the-art, relatively fast, two- and three-dimensional electrical resistivity imaging (also called profiling or tomography) have offered a new view on subsurface...
Passage to 2000
On Dec. 31, 1999 the United States turns over ownership and operations of the Panama Canal Commission. In preparation for the handover, the Panama Canal Commission, an independent U.S....
Mental Models and Maps
Each of us has a unique mental model or map of how the particular parts of the world behave or ought to behave. These particular parts might include: the realm of business, the realm of...
When the Levee Inflates
Rubber dams�long, flexible tubes, anchored to a concrete base and abutments and inflated with air or water�have been used since the 1950s, but installations have risen as technology has...
Shadow Tolls
As federal funding sources shrink, private sector involvement becomes more necessary for road projects. Private entities are reluctant to become partners in road projects unless there...
Casting Hot and Cold
Contractors and engineers battled the Minnesota winter to build a concrete segmental bridge with form travelers. Superstructure segments were poured in temperatures as low as -19F, using...
Applications of Advanced Technologies in Transportation
This volume,
All Decked Out
After 50 years of wear, the deck of New York City's Williamsburg Bridge was buckling and badly in need of replacement. In 1994, consultants recommended replacing the deck...
Sim City of Angels
Using advanced computing techniques, UCLA researchers are developing a virtual model of the entire 4,000 sp mi Los Angeles basin. Accurate to the level of graffiti on the walls and store...
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