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Groundwater Remediation Design When Pretty Good is Good Enough
This paper introduces some new approaches toward the optimal design of groundwater remediation systems or any other engineered systems. These new approaches primarily consist of making...

Investigating the Non-Convexity of the Groundwater Quality Management Response Function
Under certain simplifying assumptions, the groundwater quality management model can be considered a function of a limited number of variables that describe both the transport simulation...

Drought Management in Northeastern Colorado
The Northern Colorado Water District (the District) has established a set of policies and procedures and constructed a water storage and distribution system that allows for the effective...

California's Response to Drought
A reliable water supply is essential in supporting our society. Past experience during droughts in California suggest that appropriate action must be consistent with the severity of the...

Impact of Agricultural Water Conservation on Water Quality in Arid Irrigated Areas
Water quality constituents of concern in irrigation return flow include sediment, nitrate, pesticides, and trace elements. Each of these components can be affected by irrigation and drain...

Rethinking Well Efficiency
Many authors have suggested ways to evaluate water well efficiency. Most of these have either compared some form of measured drawdown with theoretical drawdown or measured the fraction...

Wellhead Protection Area Predictions and Implications for the Biscayne Aquifer in Miami, Florida
The need to protect groundwater supplies from sources of contamination is of particular relevance to densely populated urban areas, such as Dade County (Greater Miami), in South Florida....

Modified Jar Test Studies for Removal of Disinfection By-Products (DBPs) and Color Compounds from Groundwater
A bench scale study using a modified jar test apparatus was conducted which assessed the effectiveness of ferric chloride and aluminum chlorohydrate (AC) for the simultaneous removal of...

Establishing the Relative Process Risks for Chlorination and Ozonation - A Case Study Illustrates the Need to Evaluate the Process Hazard Implications of a Change in Drinking Water Disinfection Process due to D/DBP Regulations
Many drinking water suppliers in this country may choose to modify their primary disinfection process to meet stricter water quality standards under the United States Environmental Protection...

Watershed Management for a Limited Coastal Aquifer System
Developing a watershed strategy, which incorporates key issues of a particular watershed, may entail the coordination of several different agencies. Work performed by the USGS, local public...

Mapping Groundwater Vulnerability to Nitrate and Pesticide Contamination in the Salinas Valley, Monterey County, California
This paper describes the approach and the associated investigation leading to the development of groundwater vulnerability maps for a critical water supply region in the Monterey County....

Optimization of a Ground-Water Injection/Extraction System
This paper describes the application of linear programming to optimize the number, location, and rates of extraction/injection for a pump and treat system at a groundwater remediation...

Removal of Arsenic From Ground Water Using Granular Activated Carbon
Batch adsorption isotherm studies found that activated carbon (Hydrodarco, 14 X 40 mesh, American Norit) had removals of arsenic as high as 94% for a GAC dosage of 100 g/L and an initial...

Geochemical Modeling of Lead in Vadose Zone
In recent years, researchers have used multicomponent reactive transport models to study the mobility of potentially toxic heavy metals in the subsurface. In this study, such a mathematical...

Pipe Network Analysis and Design in Developing Regions. Case Study: Novokuznetsk, Siberia
Pipe network analysis, design and optimization in developing countries poses some unique problems, yet, is of paramount importance. Under these conditions, there is frequently only sparse...

Aquifer Transmissivity Computations Based on Data from Pump-and-Treat Facilities
Contamination from petroleum hydrocarbons spilled from USTs is a concern in urban areas that depend on shallow unconfined aquifers for their water supply. Studies on the transmissivity...

Health Risk Sensitivity to Variable and Uncertain Parameters
A methodology is presented that attempts to quantify the effects of individual variability and parameter uncertainty in a groundwater-driven health risk assessment. Two modeling approaches...

Regional Groundwater Management with Health Risk Assessment
A regional groundwater system may have several areas which are contaminated with organic chemicals. In general, the objective of groundwater management is to supply the demand for water...

Critical Needs for Sustainable Water Resources: Bridging the Gap Between Science and Implementation
This presentation will summarize the key findings of the workshop, as synthesized and prioritized by a Steering Committee composed of multi-disciplinary experts in water and environmental-related...

Managing Great Lakes Water Levels: An International Partnership
During this century, the levels of two of the Great Lakes have been regulated; Lake Superior since 1921 and Lake Ontario since 1960. The regulation is directed by the International Joint...

 

 

 

 

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