Application of a Distributed-Routing Rainfall-Runoff Model to Flood-FrequencyEstimation in Somerset County, New Jersey

摘要

The U.S. Geological Survey Distributed-Routing Rainfall-Runoff Model wascalibrated for eight basins in Somerset County, New Jersey. The drainage areas of the modeled basins range from 1.20 to 26.2 square miles. Impervious area in the basins ranges from 3.2 to 13 percent of the total basin area. Model verification efficiencies were 75 to 93 percent for storm volumes and 65 to 93 percent for peak flows. The report documents (1) the selection and calibration of a distributed-routing rainfall-runoff model on the basis of 5 years of data collected during 1980-84, (2) the simulation of the long-term flood records for 1914-79, (3) the extension of the observed records, and (4) the estimation of peak-flow frequencies at each of the eight study basins in Somerset County, New Jersey.