Research Article
Feb 1971
Hydrology and Geology of the Honolulu Aquifer
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VIEW THE REPLYAuthors: David K. Todd, F.ASCE, and Charles F. MeyerAuthor Affiliations
Publication: Journal of the Hydraulics Division
Volume 97, Issue 2
Abstract
In one sub-basin of the highly permeable basalt forming the Honolulu aquifer, the freshwater that floats upon and mixes with underlying sea water has been withdrawn at rates exceeding the sustainable yield, causing shallow drawdown cones with severe upconing of brackish water. Recharge into the area is estimated by three different methods and found to be about 5.3 mgd. By the Theis non-equilibrium method permeability of the basalt is estimated to be 13,700 gpd per sq. ft. Relatively impermeable caprock deposits appear to limit leakage of freshwater to the ocean or to adjacent aquifer areas to negligible amounts, since withdrawal at approximately the estimated recharge rate causes no increase in salinity. This study is part of a project sponsored by the U.S. Department of the Interior and the Honolulu Board of Water Supply to develop a mathematical model and to simulate by use of a digital computer the dynamic behavior of isochlors when freshwater floats on salt water.
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Published In
Journal of the Hydraulics Division
Volume 97 • Issue 2 • February 1971
Pages: 233 - 256
Copyright
© 1971 American Society of Civil Engineers.
History
Published in print: Feb 1971
Published online: Feb 3, 2021
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David K. Todd, F.ASCE
Prof. of Civ. Engrg., Univ. of California, Berkeley, Calif., USA
Charles F. Meyer
Water Resour. Prof. Mgr., TEMPO, General Electric Co., Santa Barbara, Calif., USA
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