Excerpt from Urban Hydrology for Small Watersheds, Vol. 55: Technical Release; January 1975 Lincoln, Nebr., Portland, Oreg., and Fort Worth, Tex., and from state hydrologists and engineers. This technical release is presented as a guide for field personnel in estimating the effects of land use changes and structural measures on hydraulic and hydrologic parameters, runoff volume, and peak rates of discharge. Field engineers should recognize that some of the proposed methods are in the formative stage and thus have not been fully tested. The results should be compared with other available methods, and engi neering judgment should be used in arriving at a final estimate. Careful consideration should be given to the scope and importance of the job when deciding on a particular procedure. It is not intended that all procedures fit all situations that arise. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.