Main Title |
Detection and mapping of insoluble sinking pollutants |
Author |
Meyer, Raymond A. ;
Kirsch, Milton ;
Marx, Larry F.
|
Other Authors |
|
CORP Author |
Rockwell International, Newbury Park, CA. Environmental Monitoring and Services Center.;Municipal Environmental Research Lab., Cincinnati, OH. |
Publisher |
Municipal Environmental Research Laboratory, |
Year Published |
1981 |
Report Number |
EPA-600/2-81-198; EPA-68-03-2648; PB82105586 |
Stock Number |
PB82-105586 |
OCLC Number |
09093154 |
Subjects |
Hazardous substances--Accidents ;
Water--Pollution
|
Additional Subjects |
Hazardous materials ;
Water pollution ;
Acoustic detection ;
Underwater sound equipment ;
Underwater acoustics ;
Electrical resistivity
|
Internet Access |
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
ELBD |
EPA 600-2-81-198 |
|
AWBERC Library/Cincinnati,OH |
01/12/2009 |
NTIS |
PB82-105586 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
xi, 79 p. : ill. |
Abstract |
A continuous submersible monitor using a cyclically purged electrical conductivity probe capable of long-term deployment even when buried in sand or silt has been conceived, designed, and tested. The submersible unit, which is battery-powered and has no connection to the shore-based receiver, will transmit the conductivity data via ultrasonic transmission. The unattended design life of the monitor will be 1 year. Based upon the reflection principles of high-frequency underwater acoustics, a commercial 200-kHz depth-finder system has been extensively modified and tested. Laboratory tests have indicated that the system is capable of resolving the echoes from the surface of a 1-cm-deep layer of carbon tetrachloride (CCl4) from those returning from a hard, sandy or muddy bottom. Field testing indicated that few precursors to the bottom echo return are present that might mask or interfere with the detection of an echo from a pollutant pool. Return echoes were evaluated by 16-mm motion picture photography and a computer-based comparator-counter technique has been developed for data management. Recommendations for further development and rapid deployment of the pollutant mapping system are also presented. |
Notes |
Bibliography: p. 47. |