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ScholarSpace at University of Hawaii at Manoa
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WRRCTR No.111 Recycling of Sewage Effluent by Sugarcane Irrigation: A Dilution Study,...
Phase II-A is a project that is an extension of a recently completed 4-yr project (July 1975) entitled "Recycling of Sewage Effluent by Irrigation: A Field Study on Oahu," hereinafter referred to as Phase I. The main purpose of Phase I was to... 1977-08-01
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WRRCTR No.114 Digital Simulation and Evaluation of Storm Drainage Systems: St. Louis...
The adequate design of a storm drainage system depends upon the proper estimation of various peak discharges (produced from a given storm) along the drainage network. The objective of this study is the development of a digital computer model... 1977-11-01
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WRRCTR No.116 Rotating Disc Sewage Treatment System for Suburban Developments and...
OWRT Project No. A-068-HI, Grant Agreement No. 14-34-0001-7025 1978-05-01
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WRRCTR No.92 Numerical Analysis of One-Dimensional Water Infiltration
In attempting to numerically solve the nonlinear moisture flow equation, the Galerkin process, which bears a great similarity to direct methods of the calculus of variations, and the Continuous System Modeling Program (CSMP) approach have been... 1975-06-01
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WRRCTR No.121 Recycling of Sewage Effluent by Sugarcane Irrigation: A Posttreatment...
A pilot tube farm has been installed at the Mililani Sewage Treatment Plant, O'ahu, Hawai'i, to study the necessary treatment of activated sludge effluent for drip irrigation. Four types of effluent will be processed: 100% effluent, 50% effluent... 1978-10-01
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WRRCTR No.97 Meteorological Aspects of the Oahu Flood of 19 April 1974
A detailed study has been made of the severe Oahu rainstorm of 19 April 1974 and its implications for the Hawaii flood forecast problem. Conventional meteorological analyses were performed, using standard surface observations, aircraft reports,... 1976-02-01
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WRRCTR No.129 Underground Residence Times and Chemical Quality of Basal Groundwater in...
Information on the large-scale movement and origin of groundwater in southern Oahu was obtained by examining the natural isotopic and chemical composition of water samples. Six basal groundwater systems (Pearl Harbor, Moanalua, Kalihi, Beretania,... 1980-02-01
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WRRCTR No.122 Ecological Observations off the Mokapu, O'ahu, Ocean Outfall: A...
An ecological study of the benthic and fish communities at Mokapu, O'ahu, was completed in the summer of 1978 approximately 1 yr subsequent to the installation of a submarine outfall by the City and County of Honolulu. Data were obtained from five... 1979-02-01
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WRRCTR No.95 Water Problems and Research Needs for Hawaii: 1975
Because of their insular subtropic and volcanic environment Hawaii and similar regions have special water problems and study needs not duplicated in the temperate continental region. Hawaii's water problems have also changed over the past two... 1976-02-01
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WRRCTR No.91 An Exploratory Application of Two Methods of Analyzing Water Use Time Series
This paper investigates the usefulness of two procedures for analyzing water use time series data. A simple procedure for translating price data into a form suitable for a standard regression estimation of the demand junction for water is first... 1975-06-01
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WRRCTR No.123 Hawaiian Waste Injection Practices and Problems
In recent years in Hawai'i numerous shallow waste injection wells, constructed for the disposal of domestic sewage effluent, have failed to operate as designed or desired. In the course of this study a field reconnaissance of all the known waste... 1979-01-01
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WRRCTR No.130 Recycling of Sewage Effluent by Sugarcane Irrigation: A Dilution Study,...
This study is an extension of the project, "Recycling of Sewage Effluent by Irrigation: A Field Study on Oahu," completed in July 1975. The major objective of this portion was to determine the dilution with Waiāhole Ditch water necessary for... 1980-03-01
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WRRCTR No.131 Leachate Quality from Lysimeters Treating Domestic Sewage
A study was undertaken to determine the treatability of raw domestic wastes using waste water treatment lysimeters. A pilot treatment unit was constructed that included four waste water treatment lysimeters, each utilizing a different Hawaiian... 1980-04-01
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WRRCTR No.124 Ecological Response to Relaxation of Sewage Stress off Sand Island,...
The largest domestic sewage outfall in Hawai'i discharged 3 m^3/s (62 mgd) of raw sewage in 10 m of water approximately 1 000 m off Sand Island, O'ahu, from 1955 to 1977. Results of an ecological field study of epibenthic communities in proximity... 1979-07-01
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WRRCTR No.99 Low-Flow Frequency and Stochastic Analysis of Irrigation Ditch Flows for...
The central, portion of the island of Maui, state of Hawaii, suffered from droughts during the summers of 1971 to 1975, which resulted in heavy crop losses. In order to learn more about the frequency of droughts, a study of the irrigation water... 1976-11-01
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WRRCTR No.98 Water Quality Monitoring: Kaneohe Bay and Selected Watersheds, July to...
A water quality monitoring survey of three drainage subareas in the Kaneohe Bay watershed and selected sites in the bay was conducted between July and December 1975 to ascertain the dry-weather quality baseline. The three drainage subareas were... 1976-05-01
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WRRCTR No.128 Treatment of Mililani STP Effluent for Drip Irrigation of Sugarcane
The secondary effluent of the Mililani STP is intended for use in the drip irrigation of sugarcane. The relative success of this waste water reuse application is affected by the concentration of suspended solids in the sewage effluent. Chemical... 1979-07-01
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WRRCTR No.143 Water Conduction in Hawaii Oxic Soils
Oxic soils on Oahu were studied to develop and test simplified methods of determining the hydraulic conductivity of unsaturated soils, to test some simple infiltration models, and to assess the utility of soil survey mapped units in defining... 1982-08-01
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WRRCTR No.140 Environmental Aspects of Kapaa Landfill, Kawainui, Oahu, Hawaii
The operation of the City and County of Honolulu, Kapaa Sanitary Landfill, located next to Kawainui marsh on Windward Oahu, Hawaii, raised concern over the possibility that landfill leachate could have adverse effects on the marsh. Thus, this... 1981-09-01
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WRRCTR No.141 Irrigation of Californiagrass with Domestic Sewage Effluent: Water and...
Californiagrass (paragrass) irrigated with effluent from secondarily treated domestic sewage showed excellent response as a means for disposal of large amounts of water, effective removal of nitrogen, and high production of excellent fodder. This... 1981-12-01
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WRRCTR No.96 Waste Injection into the Hawaiian Ghyben-Herzberg Aquifer: A Laboratory...
Injection of wastes into the Hawaiian subsurface environment presents unique problems because the waste effluents normally are injected into the salt or brackish water underlying the fresh Ghyben-Herzberg lens. Because the waste water commonly has... 1976-02-01
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WRRCTR No.125 Numerical Modeling of Liquid Waste Injection into a Two-Phase Fluid System
The injection of liquid wastes into a groundwater environment saturated with density-stratified fluid is simulated by a finite-difference numerical model. The fluid transport equation is simultaneously solved with the convective-dispersion... 1979-08-01
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WRRCTR No.132 Benthic Ecosystem and Fish Population off the Mokapu Outfall: A Second...
An ecological study of the benthic and fish populations at Mōkapu, O’ahu, Hawai’i was completed in the summer of 1979. This is the second post-installation study of the Mōkapu Outfall area since the commencement of effluent discharge in December... 1980-05-01
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WRRCTR No.135 Post-Secondary Treatment of Effluent for Drip Irrigation: July 1977 to...
A pilot post treatment system was designed, installed, and operated at the Mililani Sewage Treatment Plant (STP), O'ahu, Hawaii, to study the necessary treatment of activated sludge effluent for drip irrigation according to prevailing Hawaiian... 1981-01-01
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WRRCTR No.137 Contact Chamber Aeration Effects on Effluent Disinfection
The most cornmon method of disinfecting waste water effluent is by chlorination which destroys pathogenic microorganisms in the waste water stream. A field study conducted at the Wahiawa Wastewater Treatment Plant on the island of Oahu, Hawaii was... 1981-03-01
