Use of Optimization Techniques to Evaluate Ground-Water Management Strategies in the Central and West Coast Basins, Los Angeles County, California
The U.S. Geological Survey and the Water Replenishment District of Southern California are engaged in a cooperative study of the geohydrology, geochemistry, and ground-water management...
Evaluation of a Soil Vapor Extraction System: A Post-Audit Assessment
(No paper) Numerous sites contaminated with volatile organic compounds (VOC) have implemented soil vapor extraction (SVE) systems to remediate the unsaturated zone. The SVE systems have...
Dynamic Groundwater Remediation Design with Genetic Algorithms
In groundwater remediation design it has been shown that dynamic policies, in which the pumping strategies may vary throughout the remediation period, can result in more cost-effective...
Optimization of the Aquifer Remediation Costs and Design with Pulsed Pumping
(No paper) Pump-and-treat is a common technique for the remediation of contaminated aquifers. However, slow kinetic mass transfer at sites contaminated with organic compounds may reduce...
Cost-Effective Risk-Based In Situ Bioremediation Design
(No paper) Risk-based corrective action (RBCA) is rapidly becoming the method of choice for remediating contaminated groundwater sites, particularly for contaminants such as petroleum...
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...
Theoretical and Empirical Implications of Increasing Block Rates
(No paper) The U.S. Army disposed chemical agents, laboratory materials, and unexploded ordnance at the O-Field landfill from before World War II until at least the 1950s. Soil, ground...
Community Participation in the FEMA FIS Process: A New Way to Go
(No paper) As an experienced FEMA Study Contractor (SC), there are numerous items of interest that the community could participate in to facilitate the Flood Insurance Study (FIS) process....
The City of Tempe, Arizona, Rio Salado Town Lake Groundwater Management Plan
(No paper) The City of Tempe's Rio Salado Project is a mixed-use economic development project located in the Salt River channel between McClintock Drive and Priest Drive in the City of...
Rising Water and Nitrate Levels within an Alluvial Aquifer near Phoenix, Arizona
(No paper) An analysis of water level data from more than a hundred water supply wells show that water levels have been rising at a considerable rate since 1980 in some portions of the...
Progress and Future Direction to Improve Arizona's Reclaimed Wastewater Reuse Program
(No paper) The Arizona Department of Environmental Quality (ADEQ) is undertaking a major revision of its reclaimed wastewater reuse program in response to recommendations made by a citizens...
Reclaimed Wastewater Reuse in Arizona: Status and Vision for the 21st Century
(No paper) The Arizona Department of Environmental Quality (ADEQ) regulates the reuse of reclaimed wastewater through the issuance of individual reuse permits to treatment plants and/or...
Water Quality in the Sierra Vista Subbasin, Southeastern Arizona: A Baseline for the Future
As part of the U.S. Geological Survey's (USGS) National Water-Quality Assessment program, water-quality studies were completed in the Sierra Vista subbasin in southeastern Arizona during...
Reversal of Historic Water Level Decline Has Surprising Consequences
(No paper) This paper discusses the causes of the water level rise and options available to the building owner to deal with both the rising water table and VOC contamination....
Ground-Water Quality in Basins with Minimal Urban Development, Arizona
Ground-water quality data (191796) from 2,013 wells in 16 alluvial basins that have minimal urban development, were used to determine the effect of nonurban factors on ground-water quality...
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...
Saving San Antonio
During an October 1998 flood, excess flow from the San Antonio River was funneled into a 3.1 mi (5 km) long, 24 ft (7.3 m) wide concrete-lined tunnel beneath the city that emptied into...
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...
Building Knowledge (Available only in Structural Engineering Special Issue)
The Integrated Teaching and Learning Laboratory (ITLL) at the University of Colorado provides hands-on engineering lessons for students. Electrical, HVAC, structural, illumination, and...
A Statistical Approach to Modeling Groundwater Hydrology in a Constructed Wetland on the Atlantic Coastal Plain, Delaware
The design of wetlands based on groundwater as the principal source of hydrology pose uncertainties in areas where erratic seasonal groundwater fluctuations exist. Under these conditions,...
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