Geophysical test surveys with FDEM methods, Ewa Marina, Oahu, Hawaii

dc.contributor.authorNance, Tom
dc.date.accessioned2019-05-22T00:49:06Z
dc.date.available2019-05-22T00:49:06Z
dc.date.issued1990-05-30
dc.description.abstractThis report contains the results of a geophysical test survey conducted on May 22, 1990, for Haseko (Hawaii) Inc. near Ewa Marina on the Island of Oahu, Hawaii. The test data were acquired on two lines. The objective of the survey was to determine the lateral boundary between saline saturated and fresh/brackish water saturated limestones. Due to the large change in electrical resistivity between saline saturated and fresh/brackish water saturated limestones, a method which is sensitive to the ground resistivity (or its inverse, conductivity) was chosen for the test. The geophysical method utilized was frequency domain electromagnetic (FDEM) measurements with the Geonics EM-34. The EM-34 is a rapid and inexpensive method which is highly sensitive to lateral changes in resistivity. Data coverage in the study area was somewhat limited to existing roads, due to the thick vegetation, and time constraints.
dc.description.sponsorshipHaseko, Inc.
dc.format.extent25 pages
dc.identifier.otherProject #92029
dc.identifier.urihttp://hdl.handle.net/10125/61991
dc.language.isoeng
dc.publisherBlackhawk Geosciences, Inc.
dc.publisherTom Nance Water Resource Engineering
dc.subjectgroundwater
dc.subjectTDEM
dc.subjectEwa Marina
dc.subjectEwa
dc.subjectOahu
dc.subjectHawaii
dc.subject.lcshGeology--Hawaii
dc.subject.lcshGroundwater--Hawaii
dc.subject.lcshWater-supply--Hawaii
dc.subject.lcshGeology
dc.subject.lcshGroundwater
dc.subject.lcshWater-supply
dc.titleGeophysical test surveys with FDEM methods, Ewa Marina, Oahu, Hawaii
dc.typeReport
dc.type.dcmiText

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