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Title: WRRCTR No.93 Quality and Quantity of Nonpoint Pollution Sources in Rural Surface Water Runoff on Oahu, Hawaii 
Author: Yim, Spencer K.; Dugan, Gordon L.
Date: 1975-06
Publisher: Water Resources Research Center, University of Hawaii at Manoa
Citation: Yim SK, Dugan GL. 1975. Quality and quantity of nonpoint pollution sources in rural surface water runoff on Oahu, Hawaii. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. WRRC technical report, 93.
Abstract: The quality and quantity of rural runoff was the subject of a field study conducted on the island of Oahu. The study investigated surface water runoff from three rural land uses: an undeveloped forested area, a sugarcane field, and a pineapple field.
A 37.85-l (l0-gal) tipping bucket sampler was used to collect composited runoff samples at each site and to record the volume of runoff associated with each sample. The results of this study show that storm water runoff from
undeveloped areas is the major contributor of nutrients, COD, and sediment, into wet weather stream flow. Furthermore, it establishes that nutrients and COD in this type of runoff are primarily in sediment-associated forms.

The sugarcane field samples included storm runoff and irrigation tail water. The sample results indicate that cane field runoff
in central Kunia was lower in most water quality parameters than the forest runoff in Manoa. Insufficient samples due to dry weather prohibited a thorough analysis of pineapple field runoff.
Series/Report No.: WRRC Technical Report
Sponsorship: U.S. Department of the Interior, Water Resources Grant/Contract No. 14-31-0001-4011; 14-31-0001-5011 Project No. A-044-HI
Pages/Duration: vii + 60 pages
LC Subject Headings: Nonpoint source pollution -- Hawaii -- Oahu.
Runoff -- Hawaii -- Oahu.
Water -- Pollution -- Hawaii -- Oahu.
Water quality -- Hawaii -- Oahu.

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