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WRRCTR No. 4 Development of Deep Monitoring Stations in the Pearl Harbor Ground Water Area, Oahu

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Title: WRRCTR No. 4 Development of Deep Monitoring Stations in the Pearl Harbor Ground Water Area, Oahu
Authors: Cox, Doak C.
Lao, Chester
LC Subject Headings: Groundwater -- Hawaii -- Oahu.
Monitoring wells -- Hawaii -- Oahu.
Pearl Harbor (Hawaii)
Issue Date: Mar 1967
Publisher: Water Resources Research Center, University of Hawaii at Manoa
Citation: Cox DC, Lao C. 1967. Development of deep monitoring stations in the Pearl Harbor ground water area, Oahu. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. WRRC technical report, 4.
Series/Report no.: WRRC Technical Reports
Abstract: Two deep wells, one at Puuloa and the other at Ewa Beach in the Pearl Harbor area were drilled through the thick sedimentary gap into Koolau basalt, and have been readied for multiple-zone recording of water levels and water quality. Plastic pipes were lowered into the wells to selected depths determined by core composition and electric well logs. Gravel and beach sand were used selectively to backfill the wells. Thirteen sampling tubes were installed in the Puuloa well, and seven sampling points were placed in the main well at Ewa Beach. A shallow auxiliary well was also drilled at Ewa Beach. Evidence from preliminary development of the deep aquifer at Ewa Beach indicates the possible existence of a thin layer of fresher water floating on water of nearly seawater composition. Water levels are being monitored in this aquifer and show a tidal efficiency of approximately 15 percent. The smaller sampling tubes are being developed at both sites.
Sponsor: Supported in part by funds provided by the United States Department of the Interior as authorized under the Water Resources Act of 1964, Public Law 88-379. OWRR Project No. A-Oll-HI, Grant Agreement No. 14-01-0001-781
Pages/Duration: ix + 36 pages
Appears in Collections:WRRC Technical Reports

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