WRRCSR No.10:18:91 Impoundment of Stream Flow in West Loch, Pearl Harbor, Oahu, Hawaii: A Feasibility Study

dc.contributor.author Fok, Yu-Si
dc.contributor.author Murabayashi, Edwin T.
dc.date.accessioned 2009-06-09T20:43:22Z
dc.date.available 2009-06-09T20:43:22Z
dc.date.issued 1992-09
dc.description.abstract This study investigated the feasibility of capturing and storing fresh stream water flowing into West Loch, an estuarine, enclosed inland embayment of Pearl Harbor, Oahu, Hawaii, that is accessible to the sea through a narrow channel. The concept is to create a sea-level reservoir in the loch by, in some manner, displacing the salt water with fresh water. Three possible methods for accomplishing this were examined. The first two involved damming the embayment at a desired point on the seaward side by using a conventional impermeable core earth dam or a fabridam or rubber dam, for which their technology is well developed and operational. The third method involved using a flexible impermeable membrane structure to separate the fresh water from the salt water. Thus, the salt water is displaced by the freshwater-filled container without a rigid barrier. This membrane technology is insufficiently developed to use operationally at this time. Six alternative dam sites having reservoirs of varying capacities were examined and analyzed as possible locations for the enclosure. The farthest downstream site has the largest storage capacity not only because of the reservoir's larger surface area, but also because the bottom becomes progressively shallower upstream. Major conclusions were (1) no dam site has a clear advantage because the sites storing the most water are the deeper areas used by the Navy, while the smaller shallower sites cannot store significant amounts, (2) there is sufficient stream inflow to annually fill even the largest reservoir, and (3) environmentally, considerable impact will occur within the reservoir as salinity decreases to freshwater levels.
dc.description.sponsorship Division of Water and Land Development Department of Land and Natural Resources State of Hawaii Grant/Contract No. L100 19234
dc.format.extent xiv + 165 pages
dc.identifier.citation Fok YS, Murabayashi ET. 1992. Impoundment of stream flow in West Loch, Pearl Harbor, Oahu, Hawaii: a feasibility study. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. WRRC special report, 10:18:91.
dc.identifier.uri http://hdl.handle.net/10125/8774
dc.language.iso en-US
dc.publisher Water Resources Research Center, University of Hawaii at Manoa
dc.relation.ispartofseries WRRC Special Reports
dc.relation.ispartofseries 10:18:91
dc.subject impoundment
dc.subject flood-control storage
dc.subject reservoirs
dc.subject stream flow
dc.subject water supply development
dc.subject dams
dc.subject dam sites
dc.subject concrete dams
dc.subject flexible membrane structures
dc.subject fabridams
dc.subject Waikele Stream
dc.subject Waikele Springs
dc.subject Honouliuli Stream
dc.subject West Loch
dc.subject Pearl Harbor
dc.subject Oahu
dc.subject Hawaii
dc.subject.lcsh Dams -- Hawaii -- Oahu.
dc.subject.lcsh Membranes (Technology).
dc.subject.lcsh Pearl Harbor (Hawaii)
dc.subject.lcsh Water -- Storage -- Hawaii -- Oahu.
dc.title WRRCSR No.10:18:91 Impoundment of Stream Flow in West Loch, Pearl Harbor, Oahu, Hawaii: A Feasibility Study
dc.type Report
dc.type.dcmi Text
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