Building Groundwater Optimizers That Respond to the Needs of Decision-Makers
Optimization methods are being sought and employed to design systems that remediate contaminated groundwater regions (and, in fact, the subsurface in general) with increasing frequency....
Arizona Groundwater Management Alternatives
Sustainable groundwater management policies are examined through the use of a hydrologic-economic impact model of Arizona surface and groundwater use. Present water use practices were...
A Physically Based Conceptual Model for Simulating Contaminant Levels in Subsurface Water
A conceptual physical model is developed to simulate solute transport and mixing in the vadose (unsaturated) and groundwater zones. The conceptual model couples lumped-parameters models...
Vadose-Zone Monitoring, Sanitary Treatment Plant Sludge-Drying Beds, Rocky Flats Plant, Golden, Colorado
The NPDES Federal Facilities Compliance Agreement (NPDES FFCA) of March 25, 1991 between the U. S. Department of Energy (DOE) and the U. S. Environmental Protection Agency (EPA), pursuant...
Joint Pond-Wetland System Performance in Colorado
The Shop Creek retention pond and follow-up wetlands were constructed in 1989, by the City of Aurora, Colorado, and the Cherry Creek Basin Water Quality Authority to enhance urban storm...
Modeling Flow in Variably-Saturated Porous Media
An expression for effective hydraulic conductivity to solve groundwater flow problems is developed. Also, a refined Monte Carlo (MC) simulation procedure is proposed. The developed methodologies...
Designing Under Uncertainty When We Can Reduce Uncertainty: When is Another Observation Worth the Cost?
A method is presented that optimizes the selection of sites for observation of an uncertain parameter when that parameter is used in the risk-based design of an engineered system. The...
Water Policy and Management: Solving the Problems in Southern New Jersey
Southern New Jersey, which has relied solely on groundwater to satisfy its water supply needs, is depleting the primary source for that water. Symptoms of this depletion include declining...
Storm Water Pollution Control for Industry: Developing Effective Guidelines Through Public Involvement
A regionwide storm water pollution control program in the Santa Clara Valley, California, includes an active industrial source control component that is designed and implemented as a public...
Joint Optimization of Groundwater Remediation and Monitoring
We describe the challenge of devising optimization methods which optimize jointly the remediation and monitoring at a contaminated site. We refer to the dual control method as a promising...
Decision Support System for Conjunctive Use Under Complex Water Right Conditions
A prototype microcomputer based decision support system (DSS) is presented for assisting in the conjunctive use management of surface and groundwater under the water rights doctrine of...
Aquifer Storage and Recovery at the Centennial Water and Sanitation District
water in a suitable aquifer, the peak time capacity of CWSD could be increased while delaying the water treatment plant (WTP) expansion currently scheduled for 1996. To validate this assumption,...
Evaluation of the Water Supply Potential of the Floridian Aquifer in Seminole County, Florida
In Seminole County, Florida, a occurred in the 1980s and early 1990s due to a large influx of residents. This large increase in demand, when coupled with a limited groundwater supply,...
Water Polishing by Constructed Wetland Ecosystems
This paper gives results of a five-year study of minerals and nutrients reduction in a large constructed wetland facility in Central Florida, on the periphery of Orlando. The 120 ha system...
Plate and Frame Membrane Air Stripping
This paper examines utilization of a plate and frame membrane air stripping system for the removal of volatile organic chemicals (VOCs) and radon from a water supply. Previous work explored...
Computer Simulation Model of the Integrated Local Water Supply Plan for the City of Wichita, Kansas
The City of Wichita, Kansas will require additional water supply sources to meet projected future water demands. A study of options identified a supply plan with integrated use of local...
Brackish Groundwater and Urban Runoff: Source of Supply or Source of Problems?
The Sweetwater Authority hopes to be less dependent on imported supplies in water-short years, and has a goal of developing several alternative sources, including local runoff, brackish...
Wet Detention Facility Pollutant Removal Modeling
This paper documents development of the WETPOND model, which simulates long-term pollutant removal by a wet detention facility. Pollutant removal is determined with an EPA procedure that...
Different Methods to Compute Pollutant Dispersion Around Buildings
Different methods to approximate the advection terms currently in use are reviewed. Holly-Preismann (HP) cubic interpolation using method of characteristics, Chapeau function (CF) method...
How Many Observation Wells Does it Take to Find a Groundwater Contamination Plume?
A Bayesian data worth framework is developed to balance the benefits and costs of data collection. In addition to Bayesian decision analysis, tools from Monte Carlo simulation, numerical...
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