WRRCTR No.16 Effects of Soluble Organics on Flow through Thin Cracks of Basaltic Lava

dc.contributor.author Ishizaki, Kenneth en_US
dc.contributor.author Burbank, Nathan C Jr. en_US
dc.contributor.author Lau, L. Stephen en_US
dc.date.accessioned 2009-06-04T21:19:17Z
dc.date.available 2009-06-04T21:19:17Z
dc.date.issued 1967-08 en_US
dc.description.abstract The source of most of Oahu's domestic water supply is from ground water occurring in the permeable materials of volcanic rock. Movement of the ground water is intrinsically through thin cracks in basaltic lavas. This project studied passage of an organic-rich liquid through cracks in basalt. Permeability of "blue rock" portions of aa basalt was determined as 2.6 x 10^-4 gallons/day/ft^2 of water, classing the rock as impervious. A range of 7.7 to 10.4 per cent in porosity values was obtained from the "blue rock" portion; the clinker portion yielded a value of 50 per cent. Difficulties in experimental verification of the Hagen-Poiseuille derivation of radial flow through thin cracks were encountered in measuring flow at low gradients and aligning crack surfaces absolutely parallel. These discrepancies caused some variation in the determination. The flow rate is proportional to the 0.9 power of the head. Flow rates are less than theorized by Hagen-Poiseuille's derivation with the flow rate of clarified sewage being less than tap water under identical conditions. The greatest retardation in flow of non-biodegradable liquids through thin cracks occurred in the initial hours followed by a systematic reduction of flow to a terminal and nearly constant flow of 7/8 to 1/100 of the initial flow rate. Flow rates through aa basalt decrease faster than through a similated thin crack made of lucite plastic. Flow of organic-rich liquids through such cracks, similar to non-biodegradable liquids, exhibits a decrease in flow initially and continues this trend for as long as 220 hours. The terminal flow velocity of tap water is much greater than that of sewage which appears to proceed to a no-flow condition. The clogging phenomenon was dependent upon microbial activity and food supply in sewage. Retardation of flow of organic-rich liquid is attributed to presence of microbial cells and their biochemically synthesized products in the cracks. The products are primarily polysaccharides and slimes along with ferrous sulfide, a common material found in septic sewage in contact with soil or rock. en_US
dc.description.sponsorship U.S. Department of the Interior Grant/Contract No. 14-01-0001-905; A-001-HI en_US
dc.format.extent vii + 56 pages en_US
dc.identifier.citation Ishizaki K, Burbank NC, Lau LS. 1967. Effects of soluble organics on flow through thin cracks of basaltic lava. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. WRRC technical report, 16. en_US
dc.identifier.uri http://hdl.handle.net/10125/8733
dc.language.iso en-US en_US
dc.publisher Water Resources Research Center, University of Hawaii at Manoa en_US
dc.relation.ispartofseries WRRC Technical Report en_US
dc.relation.ispartofseries 16 en_US
dc.subject.lcsh Basalt -- Hawaii -- Oahu. en_US
dc.subject.lcsh Groundwater -- Pollution -- Hawaii -- Oahu. en_US
dc.subject.lcsh Hydrogeology -- Hawaii -- Oahu. en_US
dc.subject.lcsh Rocks -- Permeability -- Hawaii -- Oahu. en_US
dc.title WRRCTR No.16 Effects of Soluble Organics on Flow through Thin Cracks of Basaltic Lava en_US
dc.type Report en_US
dc.type.dcmi Text en_US
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