PREDICTION OF FLOOD VOLUME FROM SMALL HUMID REGION WATERSHEDS

The Soil Conservation Service approach of soil-cover complex concept was modified and refined for predicting runoff volumes from individual storms. Two definitions of runoff volume were examined. For each definition two approaches were investigated: (1) Predicting runoff volume with soil-cover information and the SCS rainfall-runoff model; and (2) correlating runoff volumes with climatic and watershed parameters. The first approach requires calibration of watershed wetness while the second uses a direct correlation. Prediction equations were developed with 210 events from 15 Pennsylvania and Ohio watersheds less than 20 sq miles. Both approaches were tested on the five reserved watersheds with satisfactory results. The first approach was found superior to the second. The frequency distribution of watershed wetness associated with flood events is also presented.

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Chiang, S L
• Publication Date: 1975-7

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 817-828
• Serial:
  • Journal of the Hydraulics Division
  • Volume: 101
  • Issue Number: HY7
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Climatic regions; Floods; Frequency distributions; Humidity; Hydraulics; Runoff; Soil conservation; Watersheds; Weather forecasting
• Old TRIS Terms: Humid areas
• Subject Areas: Environment; Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00125422
• Record Type: Publication
• Report/Paper Numbers: ASCE #11466 Proceeding
• Files: TRIS
• Created Date: Nov 5 1975 12:00AM