DETERMINATION OF RAINFALL LOSSES IN VIRGINIA, PHASE II

A procedure is presented by which regional unit hydrograph and loss rate parameters are estimated for the generation of design storm hydrographs for watersheds in Virginia. The state is divided into seven hydrologic regions, and unit hydrograph and loss rate parameters are computed for each region and then related to watershed characteristics such as drainage area and channel slope. The Corps of Engineers' HEC-1 computer program was used to obtain optimal estimates of the Clark unit hydrograph and the standardized exponential loss rate function parameters. A total of 28 test watersheds and more than 160 storm events with corresponding streamflow data were analyzed. Parameter selection curves were developed with the results of the HEC-1 analysis. (FHWA)

• Record URL:
  http://www.virginiadot.org/vtrc/main/online_reports/pdf/82-r39.pdf
• 
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/08326644
• Corporate Authors:

  Virginia Highway and Transportation Research Council

  Charlottesville, VA  United States 

  Virginia Department of Highways

  Traffic and Planning Division, 1221 East Broad Street
  Richmond, VA  United States  23219

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Cruise, J
  • Yu, S L
• Publication Date: 1982-2

Media Info

• Pagination: 54 p.

Subject/Index Terms

• TRT Terms: Computer programs; Design storm; Flow; Losses; Rainfall; Streamflow; Streams; Unit hydrographs; Watersheds
• Subject Areas: Highways; Hydraulics and Hydrology; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 00349953
• Record Type: Publication
• Report/Paper Numbers: FHWA/VA-82/39 Final Rpt.
• Contract Numbers: 1785
• Files: TRIS, USDOT, STATEDOT
• Created Date: Aug 30 1982 12:00AM