A derived flood frequency distribution using Horton Order Ratios

Abstract

A flood frequency distribution is derived from assumed climatic distributions and the geomorphologic unit hydrograph (GUH) model of catchment response. The derived distribution is tested on two Appalachian Mountain catchments and shows good agreement with historical data. Because the GUH is rooted in catchment shape and geomorphology, this derived frequency distribution may be a promising vehicle for studying the effect of catchment shape on flood frequency characteristics. Furthermore, it is felt that the question of catchment homogeneity and similarity, necessary for regional flood estimation, can also be studied through the GUH derived flood distribution. Copyright 1982 by the American Geophysical Union.