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ScholarSpace at University of Hawaii at Manoa
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WRRCTR No.138 Water Quality Simulation of Wahiawa Reservoir, Oahu, Hawaii
Wahiawa Reservoir is a small multi-use facility located on the central plain of Oahu, Hawaii. The goal of this study was to develop and apply a computer-simulation model of water quantity and quality in Wahiawa Reservoir. The model was used to... 1981-09-01
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WRRCTR No.139 Numerical Simulation of a Thick Freshwater Lens: Pearl Harbor Groundwater...
The freshwater aquifer in the Pearl Harbor area on O'ahu, Hawai'i is the most important water resource of the island and constitutes a large proportion of its freshwater supply. The aquifer has a freshwater lens up to 304.8 m (1000 ft) thick,... 1981-12-01
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WRRCTR No.142 Water Transfer Strategy: Energy vs. Agricultural Use
In some arid and semiarid regions where most water is appropriated for irrigation, water has been recognized as the most important limiting factor for energy development. Therefore, a water transfer from agricultural to energy use should be... 1982-03-01
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WRRCTR No.133 Bayes-Markov Analysis for Rain-Catchment Cisterns
In many parts of the world, public water-supply systems have shown signs of an inability to adequately service increasing demand. As a result, water shortages have occurred and moratoriums on new development areas have been imposed. And because of... 1980-03-01
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WRRCTR No.134 Survival, Dissemination, and Public Health Significance of Human Enteric...
The discharge of domestic sewage into the ocean waters off Oahu is a common practice. Since infectious enteric human viruses have been determined to be present in all sewages, viruses are also being discharged into the ocean environment. This... 1980-05-01
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WRRCTR No.136 Rainfall Cell Size from RIT Curve Analysis
A small and closely-spaced network of three to seven rapid response (4-s) rainfall intensity gages has been used to measure intense, short duration rain showers on the windward (eastern) coast of Hawai'i Island. During a one year, intensive... 1980-06-01
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WRRCTR No.126 Groundwater Resources of Kwajalein Island, Marshall Islands
To evaluate the long-term sustainable yield of the Kwajalein groundwater body, and also to investigate methods of optimum development of this resource, a total of 23 observation wells was constructed, from which the thickness, areal extent, and... 1980-01-01
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WRRCTR No.127 Urbanization-Induced Impacts on Infiltration Capacity and on...
The effect of urbanization on infiltration on rainfall-runoff relations was investigated at Mililani Town, O'ahu, Hawai'i, a residential community. The double-ring method determined the mean constant infiltration rate to be 0.298 cm/min (7.03 in.... 1979-09-01
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WRRCTMR No.64 Water Quality Simulation in Wahiawa Reservoir, O'ahu, Hawai'i
Wahiawa Reservoir, a multiple-use facility, has historically experienced significant water quality problems, especially low dissolved oxygen (DO) concentrations which are spatially and temporally variable. To assist decision-makers in selecting... 1981-03-01
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WRRCTMR No.65 Benthic Ecosystem and Fish Population Off the Mokapu Outfall: A Third...
An ecological study of the benthic and fish communities at Mokapu, O’ahu, was completed in the summer of 1980 approximately three years subsequent to the installation of an ocean outfall by the City and County of Honolulu. Data were obtained from... 1981-06-01
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WRRCTR No.105 Hydrologic and Ecologic Inventories of the Coastal Waters of West Hawaii
The goal of this project was to provide information to the County of Hawaii and to the state for the intelligent management of the marine and coastal resources of West Hawaii, particularly the South Kohala and North Kona areas. This was... 1977-04-01
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WRRCTMR No.76 Membrane Water-Storage Enclosures: A Pilot Study in East Loch, Pearl...
Pilot field tests were conducted in the continuing conceptual development of using impermeable membranes as separating liners to store fresh stream water in an embayment. The storage of fresh water in the ocean was conceived as a less expensive... 1984-07-01
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WRRCTMR No.77 Spectral Analysis of Hawai'i Rainfall
The empirical orthogonal function was applied to analyze 40-yr annual rainfall data for 80 stations in the state of Hawaii, which included 21 stations on Hawaii, 18 on Maui, 5 on Molokai, 5 on Lanai, 16 on Oahu, and 15 on Kauai. The chi-square... 1985-08-01
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WRRCTMR No.78 Two-Dimensional Infiltration Equations: Soil-Box Laboratory Experiments
Infiltration equations can be used to describe furrow and drip irrigation, groundwater recharge, and wastewater injection. Physical two dimensional (2-D) infiltration equations for drip irrigation expressed in explicit, power algebraic forms were... 1985-08-01
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WRRCTMR No.79 In-Line Blending Investigation for Honolulu Water System
The turbulence normally encountered in water works transmission and distribution pipelines is sufficient to mix several sources of water so that the resultant blend is the weighted average of the different sources. Such in-line blending under the... 1985-08-01
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WRRCTMR No.80 Groundwater Recharge with Honouliuli Wastewater Irrigation, Ewa Plain,...
The Ewa caprock aquifer has been a long-standing water source for southern Oahu, but the freshwater viability of the aquifer is being threatened with the gradual increase in the salinity level of pumped caprock aquifer water in recent years.... 1986-08-01
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WRRCTMR No.66 Formation of Transition Zone in a Basal Aquifer Under Pumping Stresses
Formation of a freshwater-sea water transition zone in a basal aquifer under pumping stresses was studied by sand-box experiments and by comparing experimental data with results from other theoretical and field investigations. Upconing height for... 1982-08-01
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WRRCTMR No.67 Field Methods for Unsaturated Hydraulic Conductivity and Sorptivity
The application of mathematical models incorporating water flow theory to practical hydrologic problems (e.g., runoff, groundwater recharge, irrigation) requires a characterization of soil hydraulic properties. Such properties may vary widely over... 1983-06-01
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WRRCTMR No.68 Mineralogy of Sediments in Three Estuaries on Oahu, Hawaii
Office of Water Policy, U.S. Department of the Interior Grant/Contract No. 14-31-0001-4011, -5011; 14-34-0001-7025, -7026 (A-043-HI) 1983-06-01
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WRRCTMR No.70 Stream Water Quality Assessment Based on Fecal, Coliform and Fecal...
The quality of stream water in Hawaii was determined by carefully analyzing samples of unpolluted streams, streams polluted with sewage effluent, sewage effluent, cesspool wastes, and storm drain runoff for concentrations of fecal coliform (FC),... 1983-07-01
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WRRCTMR No.71 Disinfection of Bacteria and Viruses by Sludge Heat-Treatment Process at...
The Zimpro heat-treatment process installed at the Sand Island Wastewater Treatment Plant was evaluated for its reliability in disinfecting fecal bacteria and viruses in the treated sludge. Samples of the untreated sludge and the heat-treated... 1983-09-01
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WRRCTMR No.73 Greywater Reuse
Household wastewater can be divided into "blackwater" (toilet wastewater and "greywater" (non-toilet wastewater). Recently, schemes have been proposed for the segregation of the two streams with subsequent treatment and reuse of the greywater... 1983-01-01
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WRRCTMR No.4 Preliminary Considerations - Sanitary Aspects of Underground Effluent...
It has been proposed that underground discharge of effluent from a sewage treatment plant at Waimanalo be substituted for discharge through a long and expensive ocean outfall. As a contribution to the determination of feasibility of underground... 1966-04-01
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WRRCTMR No.25 Algae an an Indicator of Fresh Water Coastal Out flow in Hawaii
Zonation of algal communities in the intertidal areas of the Hawaiian islands has been correlated with zones of reduced salinity caused by submarine fresh-water springs. Laboratory salinity tolerance experiments showed that the green seaweed Ulva... 1971-02-01
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WRRCTMR No.26 Proposed Zones of Mixing in Coastal Waters of Kauai
This memorandum report pertains to proposals to establish a number of zones of mixing in the coastal waters of Kauai in order to accommodate certain discharges of Kekaha Sugar Co., Gay and Robinson, Olokele Sugar Co., Kauai Electric Co., McBryde... 1970-08-01
