COMPARISON OF RAINFALL-RUNOFF MODELS FOR URBAN AREAS

THE RELATIVE REGENERATION PERFORMANCES OF FIVE LINEAR RAINFALL EXCESS-DIRECT RUNOFF MODELS ARE COMPARED FOR SEVERAL URBAN WATERSHEDS WITH VARYING DEGREES OF DEVELOPMENT. THE FIVE MODELS CONSIDERED ARE THE SINGLE LINEAR RESERVOIR, THE NASH MODEL, THE DOUBLE ROUTING METHOD, THE LINEAR CHANNEL-LINEAR RESERVOIR MODEL AND THE INSTANTANEOUS UNIT HYDROGRAPH (IUH) OBTAINED BY THE FOURIER TRANSFORM METHOD. THE IUH ALWAYS GIVES THE BEST REGENERATION PERFORMANCE AMONG THE FOUR CONCEPTUAL MODELS TESTED. THE OPTIMIZED SINGLE LINEAR RESERVOIR CONSTANT DIFFERS FROM THE THEORETICAL TIME LAG VALUE, BUT IS RELATED TO THE LATTER, AND FOR EACH WATERSHED VARIES FROM STORM TO STORM. FOR LARGER WATERSHEDS THE NASH MODEL GIVES THE BEST REGENERATION PERFORMANCE AMONG THE FOUR CONCEPTUAL MODELS TESTED. THE MODEL PARAMETERS FOR EACH WATERSHED ARE FOUND TO VARY FROM STORM TO STORM. THE QUALITY OF REGENERATION FOR LARGER BASINS IS LESS THAN THAT FOUND FOR THE SMALLER BASINS.

  • Supplemental Notes:
    • VOL 18 NO 3,4 PP 229-47
  • Authors:
    • Sarma, P B
    • Delleur, J W
    • Rao, A R
  • Publication Date: 1973-3

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Filing Info

  • Accession Number: 00204506
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 29 1973 12:00AM