Rainfall and Runoff in the Leeward Koolau Mountains, Oahu, Hawaii

摘要

During the course of the investigation of theground-water resources of southern Oahu, madeby the U. S. Geological Survey in cooperationwith the State of Hawaii, a water-budget studywas used to estimate the quantity of groundwater available for development. The effectiveuse of this approach required a detailed knowledgeof rainfall and runoff in the area beingstudied, especially in that part of it lying in thewet Koolau mountains, where most of theground water is recharged. Past estimates for therainfall-runoff relationship in this environmentwere rather speculative, and were based eitheron extrapolations from areas of lower rainfallor on experience obtained elsewhere. In thepresent study it became obvious that this relationshipwould have to be refined.