VARIATION OF URBAN RUNOFF WITH DURATION AND INTENSITY OF STORMS

A SIMULATION MODEL DESCRIBES THE QUANTATIVE AND QUALITATIVE REGIMES OF STORM WATER RUNOFF FROM URBAN WATERSHEDS. THE URBAN RUNOFF SYSTEM CONSISTS OF THREE BASIC SUBSYSTEMS: PRECIPITATION, RUNOFF, AND QUALITY. EACH OF THE THREE SUBSYSTEMS IS MATHEMATICALLY MODELED USING PROBABILITY AND STATISTICAL TECHNIQUES. THE MODEL ASSUMES THAT SHORT-DURATION HIGH-INTENSITY CONVECTIVE STORMS ARE RANDOM AND GOVERNED BY A STATIONARY PROBABILITY DISTRIBUTION FUNCTION. A BIVARIATE LOG-NORMAL DISTRIBUTION FUNCTION FITS THE OBSERVED RAINFALL DEPTHS AND DURATIONS FOR LUBBOCK, TEXAS. THE RUNOFF PROCESS IS MODELED BY USING THE BRITISH ROAD RESEARCH LABORATORY METHOD, WHICH ASSUMES THAT ALL RUNOFF IS DERIVED FROM INTERCONNECTED IMPERVIOUS AREAS. RAINFALL INPUTS ARE SIMULATED BY THE MONTE CARLO METHOD. THE TOTAL POLLUTANT LOAD IS PREDICTED BY A MULTIPLE REGRESSION INVOLVING THE STORM CHARACTERISTICS AND THE ANTECEDENT CONDITIONS. /AUTHOR/

  • Supplemental Notes:
    • WRC 71-5
  • Corporate Authors:

    Texas Technological College, Lubbock

    Water Resources Center
    Lubbock, TX  USA 
  • Authors:
    • Wells, D M
    • Austin, T A
    • Cook, B C
  • Publication Date: 1971-8

Media Info

  • Pagination: 161 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00204447
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 17 1972 12:00AM