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A Local Approach to Regulating Toxic Air Contaminants
The Monterey Bay Unified Air Pollution Control District began developing a local toxic rule that would apply to a broad number of pollutants and yet be readily usable to a permitting engineer....

Agricultural Salinity?Nature, Extent & Concerns
This paper presents an overview on the nature, extent and concerns of agricultural salinity problems. The problem of salinity has extended beyond the farmlands, and the practice of saline...

Effects of Salts on Soils and Plants
Salinity is a major constraint to crop production in many irrigated lands of the world. Management practices are needed for the control of soil and water salinity. The development of appropriate...

Land Reclamation and Drainage Water Reuse
This paper presents a brief overview of two chapters appearing in 'Agricultural Salinity Assessment and Management Manual', K. Tanji, Edit., Irrigation and Drainage...

Irrigation and Drainage Practices
Salinity causes many problems in agriculture, by lowering production or requiring more intensive management on farms, or by degrading off-farm soils and waters. This paper describes causes...

Institutional, Environmental and Legal Issues
An evaluation of the subsurface agricultural drainage problems occurring on prime agricultural land on the west side of the San Joaquin Valley of California offers an insight into the...

Irrigation Agriculture: Is it Sustainable?
Irrigation in (semi-) arid climates can be managed in such a way that it can be sustained indefinitely. Salination can be avoided by providing adequate drainage. Drainage, however, exacts...

Cokriging for Evaluating Agricultural Pollution
Subsurface drainage data from irrigated lands near Twin Falls, Idaho were used. Total Dissolved Solids and NO₃-N were selected as variables. The...

Sensitivity of Non-Point Source Models to Net Rainfall
A sensitivity analysis of the ANSWERS model was conducted to explore the possible impact on model outputs of discretizing rainfall input data into short time increments of various durations....

A Multivariate Analysis of Stillwater Lakes, Nevada
Stillwater Lakes located in western Nevada has been experiencing an astounding number of fish and waterfowl deaths since August 1986. This problem is explored through a multivariate statistical...

Behavior of Total Zinc in the Similkameen River
Multiple linear regression analysis was used to: develop equations that summarize the relationship between total zinc and a set of water quality characteristics measured in the Similkameen...

Prediction of Overland Phosphorus Transport Using a Phosphorus Enrichment Ratio
The Guelph model to evaluate the effects of Agricultural Management Systems on Erosion, Sedimentation, and Phosphorus yield (GAMESP) of Rousseau et al. was used to calibrate the phosphorus...

Urban Stormwater Runoff Management
Local land use regulations managing stormwater runoff in new urban developments are the most practical and effective method to control pollutants in urban stormwater runoff or prevent...

Groundwater Protection in New York State
Groundwater protection is implemented by a variety of governmental entities. At the state level, the Departments of Environmental Conservation (DEC), and of Health (DOH) are the agencies...

Principles of Ground Water Strategy
The states are now preparing or adopting ground water strategies under EPA direction. State and federal initiatives are currently uncoordinated, and do not add up to a coherent program....

Modeling of Nitrate Transport Coupled Dentrification in the Saturated Zone
A numerical model for simulating nitrate transport coupled to microbial activity in the saturated zone is presented. A coupled system of equations describes the transport and microbial...

Approaches for Protecting Groundwater From Agricultural Threats
In general, major groundwater pollutants contributed from agricultural sources are nitrate-nitrogen from chemical and animal fertilizers and pesticides applied on farm products for pest,...

Chemigation Equipment for Protecting Water Quality
Concerns for protecting groundwater quality have brought forth some strict EPA regulations on equipment required for injecting pesticides into irrigation systems. These chemigation equipment...

Formulating a Coastal Plain Water Quality Project
In 1988, the Soil Conservation Service in Delaware helped local sponsors prepare a detailed preauthorization planning report for water quality improvement in Indian River Bay watershed,...

A Review of Water Table Management & BMP Effects on Selected Nitrogen Processes
This study addresses the combined impacts of water table management (WTM) and best management practices (BMP's) on surface and ground water quality. DRAINMOD (water table...

 

 

 

 

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