Determination of Flood Hydrographs for Streams in South Carolina. Volume 2.Estimation of Peak-Discharge Frequency, Runoff Volumes, and Flood Hydrographs for Urban Watersheds

摘要

Knowledge of the magnitude and frequency of floods is needed for the design ofhighway drainage structures, for establishing flood insurance rates, and for many other uses by urban planners and engineers. Urban flood hydrographs also are needed for the design of many highway drainage structures and embankments and floodwater storage structures. The report describes methods that can be used to estimate peak-discharge-frequency relations, flood hydrographs, and flood volumes for ungaged urban streams in the Piedmont and Coastal Plain provinces of South Carolina. Data from stream-gaging stations on 34 urban watersheds in South Carolina, Georgia, and North Carolina, ranging in size from 0.18 to 41.0 square miles, were used in the analyses.