Deep saline aquifers are being used for disposal of hazardous liquid wastes. A thorough knowledge of the competency of such aquifers and their confining geologic beds in permanently isolating the hazardous substances is the key to successful disposal operations. Characterization of such systems, and in particular the detection of any conduit that may permit hydraulic communication between the host aquifer and nearby freshwater aquifers, must be carried out prior to the initiation of disposal projects. In deep, multi‐aquifer systems, leaky faults, abandonded wells, highly conductive fractures, or shear zones may all provide leakage paths. If not initially detected, such conduits may show no apparent effect until contaminants in the freshwater aquifer reach detectable levels at the discharge point. By then, of course, detection is generally too late. This paper is an attempt to address the problem of initial detection of improperly plugged or open abandoned wells. A new analytic solution has been derived to calculate the amount of leakage from an abandoned well and the corresponding drawdown at monitoring wells. A method is proposed that can be used to detect such deep abandoned wells in the area of influence of a proposed deep injection well in a multiple‐aquifer system.
The U.S. Geological Survey began the Toxic Substances Hydrology Program in 1982 to study, in an interdisciplinary atmosphere, the fate and effects of toxic substances in the environment. The objective of the Program is to provide the earth-science infom1ation needed to prevent or mitigate contamination of the Nation's ground and surface waters. To achieve this goal, research is conducted in four categories--focused lield investigations of contaminated sites, additional research on toxic substances hydrology, development of methods to study or sample contaminated waters, and investigatioi1s of nonpoint sources of contamination. This report contains citations of reports on research conducted under the auspices of the Program from the begirming of the Program through the end of 1993.
Bemidji Multiphase-flow modeling at the Bemidji, Minnesota, crude-oil spill site with geostatistical simulation of hydraulic properties, by Leslie A. .J2.illm:d, Hedeff I. ~.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.