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Recovery Efficiency From Single-Well Injection/Recovery Tests in a Limestone Aquifer of High Secondary Porosity
An analytical advection-diffusion model was developed to assess the feasibility of injecting and recovering water in a limestone aquifer of high secondary porosity. The model was calibrated...

Artificial Recharge of Ground Water
A need for international and interdisciplinary technology transfer on the subject of artificial recharge resulted in the American Society of Civil Engineers' (ASCE) Irrigation...

The Ozone Defense
Ozone is a molecule containing three oxygen atoms. When bubbled through drinking water, the third atom in ozone is attracted away by other molecules, a process called oxidation. This process...

Managing Dioxin
Dioxins, among the most toxic compounds known to man, are by-products from production of other chemical products. There are currently about 5000 metric tons of dioxin-containing wastes...

Physical and Chemical Treatment of Contaminated Groundwater at Hazardous Waste Sites
In selecting an appropriate groundwater treatment system, three steps are normally followed. 1. A groundwater investigation is performed to determine the types and concentrations of contaminants...

Decisionmaking for Dredggedg Material Management
Management of dredged material produced in coastal environments is greatly complicated by the presence of chemical contaminants in the material. The kinds and quantities of contaminants...

Effects of Toxic Chemical Perceptions on Fishing Behavior
This study investigates: 1) whether angler's who perceive toxic chemicals in the water fish any differently than those who do not, and 2) do these behavioral differences have...

Implementation of Annex II to Marpol 73/78 and the Impact on Reducing Pollution in the Coastal Zone
Implementation of the International Treaty for the Prevention of Marine Pollution from Ships 1973, as amended by the Protocol Related Thereto, 1978 (MARPOL 73/78) will help to reduce the...

Perceiving Toxic Chemicals in Fishing Environments
The perception of toxic chemicals in the fishing environments by anglers was examined in Kansas and Michigan. The main findings of the study were: 1) There appears to be a small, but significant...

Quantifying Chemicals in Coastal Environments
Because management and regulation is largely based on numerical chemical data, understanding of the process, products and limitations of environmental chemical analysis is critical for...

Stewardship 87
Stewardship 87 provides new linkages between land users, public agencies and the non-profit sector. It creates a totally new rapport between local governments (dependent upon ad valorem...

Rocky Habitat Mitigation Using Artificial Reefs in Puget Sound, Washington
In Puget Sound, Washington, artificial reefs are being studied to determine their potential to mitigate for man-caused degradation of rocky habitat. These studies demonstrate the biological...

Use of Sediment Bulk Chemistry Data for Dredged Disposal Management in Puget Sound
Although no fully scientific approach for setting and interpreting sediment chemical levels is currently available, an effects-based approach for using bulk chemistry data was evaluated...

Design of Waste Containment Structures
Synthetic liners, also known as flexible membrane liners (FMLs), have been used increasingly since the early 1970s to contain chemical and hazardous wastes because of their low permeability...

Earthen Liners for Land Disposal Facilities
Proper construction of compacted earthen liners requires special attention to construction details and quality assurance. Moisture content and weight of roller are probably the two most...

Chemical Effects on Clay Hydraulic Conductivity
Hydraulic conductivity and its susceptibility to changes with time or exposure to chemicals are major factors in selection of clay for use in waste containment barriers. Available concepts...

Ion Transfer by Diffusion Through Clayey Barriers
The practical aspects of pollutant migration by diffusion through clayey barriers is presented. The discussion is generally restricted to soils of pH approximately equals 8 which contain...

Waste Concentration Effects of Grout Barriers
Great concern has developed over hazardous waste sites, particularly in the leaching of the hazardous wastes into groundwater supplies. Many sites that are considered contaminated and...

Fly Ash as a Potential Waste Liner
Earthen liners have been widely used to contain toxic and hazardous materials in ponds and landfills. There is close scrutiny over the durability of liners in contact with various wastes...

Hydrogeologic Investigations at a Superfund Site in Wisconsin
An estimated 10,000 drums of volatile organic wastes from a nearby manufacturing plant were dumped at a landfill site in southern Wisconsin. Chemicals released from these drums have contaminated...

 

 

 

 

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