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Title: WRRCTR No.30 Hydrograph Study and Peak Discharge Determination of Hawaiian Small Watersheds: Island of Oahu 
Author: Wu, I-Pai
Date: 1969-03
Publisher: Water Resources Research Center, University of Hawaii at Manoa
Citation: Wu I-P. 1969. Hydrograph study and peak discharge determination of Hawaiian small watersheds: Island of Oahu. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. WRRC technical report, 30.
Abstract: Hawaiian small watersheds are unique in watershed hydrology because of the high infiltration rate, small size, and mountainous topography. The flood hydrograph which has a short time to peak and small recession constant can be expressed as a steep triangular shape. A peak discharge equation is derived from the concept of a triangular hydrograph and a linear storage of recession flow. The peak discharge
equation can be shown as a very simple form, Qp = CAR, where C is a coefficient and can be determined by the hydrograph time parameters, time to peak and recession constant, A is the watershed area, and R
is surface runoff in inches. A linearity test between peak discharge and runoff has been made for Hawaiian small watersheds and a good linear relationship was found between peak discharge and surface runoff which is less than six inches not only for an individual small watershed but for watersheds of similar size.
Series/Report No.: WRRC Technical Report
30
Sponsorship: U.S. Department of the Interior Grant/Contract No. 14-01-0001-1493; B-003-HI. Hawaii Agricultural Experiment Station, College of Tropical Agriculture, University of Hawaii, City and County of Honolulu.
Pages/Duration: vi +85 pages
URI: http://hdl.handle.net/10125/7598
LC Subject Headings: Hydrology -- Hawaii -- Oahu.
Stream measurements -- Hawaii -- Oahu.
Watersheds -- Hawaii -- Oahu.

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