SYNTHESIS OF THE INLET HYDROGRAPH

A GENERAL METHOD IS PRESENTED FOR SYNTHESIZING THE HYDROGRAPH OF RUNOFF FROM AN IMPERVIOUS AREA. FROM A KNOWN PATTERN OF RAINFALL STORM, AND A CERTAIN GEOMETRY OF THE AREA WITH AN ACCURATELY DETERMINED ROUGHNESS COEFFICIENT, THE INLET /SURFACE WATER DRAINAGE INLET/ HYDROGRAPH CAN BE COMPUTED THROUGHT DIRECT ROUTING OF THE OVERLAND FLOW. THE BASIC EQUATIONS USED ARE THE CONTINUITY EQUATION AND THE DYNAMIC EQUATION FOR GRADUALLY VARIED UNSTEADY FLOW. THE COMPUTED INLET HYDROGRAPHS OF SEVERAL SMALL RECTANGULAR SHAPED IMPERVIOUS DRAINAGE AREAS SHOWED GOOD AGREEMENT WITH THOSE MEASURED. SENSITIVITY TEST OF THE COMPUTED HYDROGRAPH TO CHANGES OF THE ROUGHNESS COEFFICIENT WAS INVESTIGATED. COMPARISON OF THIS METHOD WITH SEVERAL EXISTING METHODS WAS MADE. /BPR/

  • Supplemental Notes:
    • Tech Rept NO 3, ADM, CPR-11-5975
  • Corporate Authors:

    Johns Hopkins University, Baltimore

    Baltimore, MD  United States  21218
  • Authors:
    • Schaake, J C
  • Publication Date: 1965-6

Subject/Index Terms

Filing Info

  • Accession Number: 00203957
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS
  • Created Date: Aug 1 1994 12:00AM