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Computerized Data Processing and Geographic Information Systems Applications for Development of a 3-Dimensional Groundwater Flow Model
A 3-dimensional numerical groundwater flow model was developed for a 100 square mile area located in the Santa Clara Valley, California. The model development relied upon data base and...

Ground Water Management Standards and Protection Tools
Once local goals and objectives for ground-water protection have been defined, wellhead protection areas delineated, sources of contamination inventoried and assessed, management techniques...

Technical and Organizational Constraints on Surface and Groundwater Irrigation in Small-Holder Areas of S. Asia
Variable irrigation supply and the independent character of the S. Asian small-holder combine to present a difficult problem in irrigation management. Attempts to introduce advanced technology...

Ecological Considerations in Groundwater Management
A wide variety of potential effects of groundwater management on terrestrial vegetation and aquatic biota are described and illustrated with examples from California....

Coupled Simulation-Optimization Approach to Wellhead Protection Area Delineation to Minimize Contamination of Public Ground-Water Supplies
A loosely coupled simulation-optimization procedure is used to determine the steady-state pumping rates for individuals wells in a multiple well municipal wellfield that result in the...

Groundwater Contaminant Transport at a Hazardous Waste Disposal Site, Pullman, Washington
Groundwater contamination at a hazardous waste site near Pullman, Washington is simulated by a numerical model. The aquifer at the site is classified as an unconfined valley aquifer. Solute...

Investigation and Rehabilitation of the Moses Lake Larson Wellfield
In 1988, low levels of trichloroethylene (TCE) were detected in several of the Larson wells operated by the City of Moses Lake. The wells are up to 800 feet deep and are completed in fractured...

Optimal Strategy for Aquifer Remediation
A methodology for the restoration and cleanup of existing subsurface contaminated sites and for the contaminant of pollutants is developed. The remediation problem is posed as an optimization...

Artificial Recharge to Manage Groundwater Quality in a Connected Surface Water Groundwater System
Finite difference method is used to formulate the management problem of movement of water and solute in a connected surface water groundwater system. Pumped groundwater quality of conservative...

Developing, Managing, and Protecting Urban Aquifers in the Pacific Northwest
Water purveyors in the Puget Sound region have applied a variety of innovative techniques to effectively manage urban groundwater supplies from a quantity and quality perspective. Two...

Large-Scale Conjunctive Use of the San Gabriel Basin: An Environmentally Beneficial Water Supply Project
The 170-square-mile San Gabriel Basin in Los Angeles County, California, has commanded the attention of both water supply and environmental agencies because: (1) it is an idyllic natural...

Upper Guadalupe River Authority, Texas?Innovative Solution to Long-Term Water Needs
Through conjunctive use of groundwater and surface water, the Upper Guadalupe River Authority (UGRA) has designed a water supply system for the City of Kerrville, Texas that saves 80 percent...

Impact of Groundwater Management Act and CAP Water Supply on Agricultural Water Conservation Programs
Irrigation districts in central Arizona have increased the tax assessments for their farms to pay for distribution systems to deliver Central Arizona Project (CAP) water. Many farms must...

Agricultural Water Conservation Programs in the Lower Colorado River Authority
Rice irrigation is the largest application of water within the area served by the Lower Colorado River Authority, accounting for approximately 75 percent of total annual surface and ground...

Optimal State Feedback Estimation in Groundwater: Application to Leaky Aquifers
The problem of groundwater flow in leaky aquifer is looked at from a stochastic point of view. Optimal estimation of hydraulic heads are achieved using Kalman filtering. The Kalman filtering...

Selection of Optimal Best Management Practices (BMP's)
The National Pollutant Discharge Elimination System (NPDES) urban storm water program requires municipalities to remove non-point source (NPS) pollution to the 'maximum extent practicable',...

Landfill Groundwater Monitoring Data Administration
The U.S. Environmental Protection Agency (USEPA) has promulgated regulations that require the monitoring of groundwater samples at landfill sites. The analytical data resulting from sample...

New Wells Safeguard Scenic Tahoe
Surface water for drinking and for snow-making is becoming scarce in the Lake Tahoe region, along the California and Nevada border. New Environmental Protection regulations regarding surface...

A Comparison of Electromagnetic Survey Results and Groundwater Quality Samples at an Animal Waste Storage Pond
Animal waste storage ponds are widely used to store manure over winter until it can be surface applied to growing crops as a fertilizer. There is an increasing concern for groundwater...

Hydrology of Wetland Treatment Systems in East Orange County, Florida
Wetlands are increasingly being used as final treatment systems for industrial and domestic wastewater effluent discharges and stormwater runoff discharges. Hydrological monitoring and...

 

 

 

 

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