Record Display for the EPA National Library Catalog

RECORD NUMBER: 28 OF 107

OLS Field Name OLS Field Data
Main Title Electromagnetic Methods for Mapping and Evaluating Aquifers.
Author Morriso, H. F. ;
CORP Author California Univ., Berkeley. Water Resources Center.
Year Published 1972
Report Number UCAL-WRC-W-190; OWRR-B-067-CAL; 13182,; B-067-CAL(1)
Stock Number PB-211 646
Additional Subjects ( Aquifers ; California) ; ( Electromagnetic prospecting ; Aquifers) ; Subsurface investigations ; Ground water ; Depth sounding ; Gravel ; Clays ; Evaluation ; Santa Clara Valley
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB-211 646 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 5p
Abstract
An electromagnetic depth sounding experiment with a horizontal loop carrying an oscillating current was carried out in Santa Clara Valley, California. The field data are interpreted in terms of the polarization parameters of the magnetic polarization ellipse. The chosen parameters are tilt-angle, ellipticity and the modulus of wave-tilt. The electrical discontinuities deduced are in general agreement with well data and with a geologic section based on resistivity soundings. The results clearly reveal an intermediate, highly resistive layer, which is a permeable stratum for groundwater recharge. It is concluded that a portable electromagnetic sounding system, measuring only tilt-angle and ellipticity, should easily locate highly resistive gravel deposits bounded by conductive clay beds. (Author)