STORM SEWER DESIGN-AN EVALUATION OF THE RRL METHOD

STORM RAINFALL AND RUNOFF DATA WERE ASSEMBLED FROM 10 URBAN BASINS IN THE U.S.A. RANGING IN SIZE FROM 14 ACRES TO 8 SQ.MO. THE BRITISH RRL METHOD OF STORM DRAINAGE DESIGN WAS APPLIED TO THE 10 BASINS. THE RRL METHOD CONSIDERS THE URBAN BASIN TO BE COMPRISED OF THE PAVED AREA OF THE BASIN WHICH IS DIRECTLY CONNECTED TO THE ARTIFICIAL STORM DRAINAGE SYSTEM. IN 3 OF THE 10 BASISNS THE RRL PROCEDURE WAS DEEMED TO BE APPROPRIATE AND SUITABLE FOR THE DESIGN OF A STORM DRAINAGE SYSTEM WITHIN THE NORMAL RANGE OF FREQUENCY OF DESIGN RAINFALL EVENTS, FROM 2 TO 20-YEAR EVENTS. FOR GREATER STORMS AND FOR CERTAIN CASES WITHIN THIS FREQUENCY RANGE, THE RRL METHOD BREAKS DOWN BECAUSE THE RUNOFF COMING FROM THE GRASSED AREA OF THE BASIN IS SIGNIFICANT. IF THE BASIN IS HIGHLY STEEP OR IF THE PAVED AREA COMPRISES LESS THAN 15% OF THE TOTAL BASIN, THIS BREAKDOWN OCCURS.

  • Corporate Authors:

    Illinois State Water Survey Division

    2204 Griffith Drive
    Champaign, IL  United States  61820
  • Authors:
    • Stall, J B
    • Terstriep, M L
  • Publication Date: 1972-10

Media Info

  • Pagination: 82 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00204500
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 25 1973 12:00AM