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Estimating Upland Recharge in the Yucca Mountain Area
Field and modeling studies were conducted recently for the Fortymile Canyon watershed and the Rock Valley area near the site of the proposed high-level nuclear waste repository at Yucca...

Multiobjective Decision Theory ? Decision Support Systems with Embedded Simulation Models
The concepts of multiobjective decision making utilizing embedded computer simulation models and dimensionless scoring functions are described in the context of a decision support system...

Effects of Uranium Mining, Puerco River, New Mexico
Effluent from uranium-mine dewatering and acidic water released by a tailings-pond dike failure increased radionuclide activities in streamflow in the Puerco River in New Mexico and Arizona....

Economic Evaluation of Farning Systems to Protect Surface and Ground Water Quality
Two approaches are discussed for evaluating the economic and environmental effects of farming systems designed to protect water quality. The scenario approach evaluates specific farming...

Ground Water Impacts from Irrigated Ridge-Tillage
The Northern Cornbelt Sand Plain Project is a cooperative research effort between the State Agricultural Experiment Stations, USDA/Agricultural Research Service and U.S. Geological Survey...

Long-Term Effects of Tillage and Crop Rotation on the Leaching of Nitrate and Pesticides to Shallow Groundwater
Contamination of groundwater by nitrate-nitrogen (NO₃-N) and pesticides is a serious problem and concern in Iowa. The extent of contamination can...

Nutrient Loads to Delaware's Inland Bays Estuary
A management plan has been developed for the Inland Bays which is a major coastal estuary. Agriculture is the largest contributor of nitrogen and phosphorus to the Inland Bays. Best management...

Plugging Evaluation in the Re-Use of Sewage Effluent by Drip Irrigation
Primary and secondary effluent can be reused for irrigation by a drip system. When a proper lateral line with an emitter size of 0.75 mm is selected, the plugging can be maintained at...

Pitfalls Associated with the Assumption of a Constant Partition Coefficient in Modeling Sorbing Solute Transport Through the Subsurface
This paper presents several case studies where the estimation of the adsorption coefficient, K_d, by means of the K_oc-f_oc...

An Overview of EPRI Hydrogeochemical Code FASTCHEM^TM
The capabilities of the flow and transport modules that make up FASTCHEM are described. The linkages among the various modules that are required to achieve a hydrogeochemical analysis...

Optimization of a Municipal Ground Water Production System in North-Central Oklahoma
A management model is being developed to optimize the municipal groundwater production system which supplies drinking water for the City of Enid, Oklahoma. The system is comprised of one...

Risk-Based Decision-Making Regarding Mixed Waste Disposal Systems
An efficient approach has been developed for making rational and defensible decisions among a variety of 'options' (e.g., remedial actions, engineered barrier...

Terrain Conductivity to Define Groundwater Pollution
Electromagnetic terrain conductivity surveys were conducted at four animal waste lagoon sites in South Carolina in an effort to delineate groundwater contamination from animal waste lagoon...

Agricultural Chemicals in Illinois' Rural Private Wells
A statewide sampling program was undertaken to define the extent of agricultural chemicals in rural, private drinking water wells in Illinois. A stratified random approach was taken for...

Survey of Rural, Private Wells: Statistical Design
Half of Illinois' 38 million acres were planted in corn and soybeans in 1988. On the 19 million acres planted in corn and soybeans, approximately 1 million tons of nitrogen...

Pump Station/Storage Opportunities for Urban Freeway Systems
This paper introduces the concept of utilizing underground storage to minimize both the initial cost and the long-term maintenance and operation costs of multiple pump stations for a freeway...

Rio Moquino Stream Stability and Erosion Protection, Jackpile Uranium Mine
The uniqueness of the Jackpile Reclamation Project and the changes in reclamation technology over the past few years have prompted a reexamination of some of the design criteria specified...

Physical Model of a Floating Trash Boom to Control Aquatic Weeds at the TVA Widows Creek Fossil Plant
The Tennessee Valley Authority (TVA) Widows Creek Fossil Plant seasonally encounters adverse accumulations of aquatic weeds at the intakes of the condenser cooling water pumps. To reduce...

McClure Park: A Multi-Purpose Off-Stream Storage Facility for Tulsa, Oklahoma
The City of Tulsa is in the process of implementing a flood control plan for the 61 square-mile (158 km²) Mingo Creek watershed. The federally-assisted...

Applications of GIS for Water Quality Modeling in Agricultural and Urban Watersheds
Two studies were conducted to integrate: 1) an agricultural nonpoint source pollution model, AGNPS, with Geographic Information System (GIS) databases, digital elevation model (DEM) data,...

 

 

 

 

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