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Modeling Erosion and Effects of Agricultural BMP's on a West Tennessee Watershed
The application of Hydrological Simulation Program FORTRAN (HSPF) to nonpoint source data was examined. The model is used to determine the effects of land management practices upon surface...

Stream Standards for Toxics and Irrigated Agriculture Using New Mexico as a Case Study
New Mexico follows a policy of 'antidegradation' with respect to the existing quality of a stream, but its standards specifically exclude return flows from irrigated...

The Colorado River Salinity Program?An Overall Perspective
Economic losses resulting from increases in salinity in the Colorado River system were estimated to be $311 million annually in 1986. As a result of protests by Mexico to the United States...

The USDA Colorado River Salinity Control Program
Approximately 37 percent of the salt contribution in the Colorado River can be attributed to irrigation activities in the river basin. The United States Department of Agriculture (USDA),...

Impact of Agriculture on Ground-Water Quality on the Delmarva Peninsula
Both pesticides and nitrates have been detected in the ground water on the Delmarva Peninsula. Highest nitrate concentrations have been found on well-drained soils. Poultry manure is one...

Research Need on Integrated System for Water and Pest Management to Protect Groundwater Quality
Research is urgently needed to develop the technology for integrating the methodologies for managing soil, water, ground cover, pesticide applications, and fertilizer applications in such...

Influence of Method of Fertilizer Application on Groundwater Pollution
Researchers at New Mexico State University have been looking for methods to improve the efficiency of fertilizer application in irrigated agriculture. Preliminary results obtained in the...

Evaluating Groundwater Pollution Potential Using Geographical Information Systems
A procedure for developing groundwater pollution potential maps using a geographical information system (GIS) is introduced. The concept of pollution potential mapping is discussed, along...

Deep Percolation, Drainage and Water Quality
The purpose of this study is to illustrate and and qualitatively describe results of steady and transient numerical simulations examining the influence of drain spacing and depth on shallow...

Comprehensive Management of a Sole-Source Aquifer in Central Texas - A Model for Coping with Urban Development in Hydrologically Sensitive Areas
In the developing San Antonio/Austin area of central Texas, the Edwards Aquifer is highly vulnerable to contamination resulting from development. The Texas Water Commission (TWC) strives...

Kesterson Crisis: Sorting Out the Facts
The United States Bureau of Reclamation (USBR) began planning and construction activities in the mid-1960's for the San Luis Drain, a master drain to dispose of salt-laden...

Prognosis on Managing Trace Elements
Management options assessed for trace elements discharged from irrigated lands include source control, drainwater reuse, drainwater treatment and removal of contaminants, disposal, and...

Water Quality Criteria for Cyanide in the Similkameen River, British Columbia
The toxicological and environmental significance of the major cyanide compounds is discussed. Data from earlier bioassays studies of cyanide are summarised and the ranges of median lethal...

Movement of Triazine Herbicides and Metolachlor in a Sandy Soil
The movement of atrazine, cyanazine, simazine, and metolachlor was studied in an Evesboro loamy sand soil. Both no-tillage and conventional tillage treatments were used. Atrazine, simazine,...

Water Quality of Jubba River in Somalia
Monitoring of water quality in the Jubba River in Somalia of East Africa, led to indications of a potential impact of toxic trace elements, salinity and biocides in restricting agricultural...

Nonpoint Source Pollution from Agricultural Drainage: Impacts and Innovations in California
This paper provides an overview of the more significant impacts of agricultural drainage in California, and describes the role of the State's Agricultural Drainage Water Management...

Environmental Aspects of Water Resources Development
Long-term management of resources requires a comprehensive anlysis of the effects that development and management of one resource may be expected to exert upon other resources. However,...

Water Quality Study in an Arid Region Lake: Lake Bosten, Northwest China
This paper gives a brief description of Lake Bosten, its importance to Xinjiang Province of the PRC, objectives of an on-going study, and some preliminary results. This on-going study...

Soil-Moisture Flux Studies on the Nevada Test Site A Review of Results and Techniques
Over the last 20 years, numerous studies of soil-moisture flux and/or ground-water recharge have been conducted on the U.S. Department of Energy's (DOE) Nevada Test Site (NTS)...

Vertical Transport in the Vadose Zone by Fingering
Water containing contaminants may infiltrate through the vadose zone as a series of fingers which result from a hydrodynamic instability initiated at an interface in which a fine textured...

 

 

 

 

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