VARIATION IN LAG TIME FOR NATURAL CATCHMENTS

LAG TIME FOR A CATCHMENT IS SHOWN TO BE A VARIABLE WHICH IS STRONGLY CORRELATED WITH FLOOD MAGNITUDE. VALUES FOR VARIOUS PARAMETERS OF RAINFALL AND RUNOFF WERE DERIVED FROM THE ANALYSIS OF RECORDS FOR FIVE SMALL CATCHMENT AREAS. LAG TIME IS DEFINED AS THE TIME BETWEEN THE CENTERS OF MASS OF EXCESS RAINFALL AND DIRECT RUNOFF. WEIGHTED MEAN DISCHARGE IS USED AS THE MEASURE OF AVERAGE STREAMFLOW MAGNITUDE. NO SIGNIFICANT CORRELATION IS FOUND BETWEEN THE LAG AND VARIOUS CHARACTERISTICS OF THE AREAL AND TEMPORAL DISTRIBUTION OF RAINFALL. THEREFORE, THE LAG-WEIGHTED MEAN DISCHARGE EQUATIONS BEST REPRESENT THE VARIABLE LAG TIME FOR THE CATCHMENTS STUDIED. /ASCE/

• Supplemental Notes:
  • Vol 96, No HY2, PROC PAPER 7051, PP 317-330, 4 FIG, 12 REF,
• Authors:
  • Askew, A J
• Publication Date: 1970-2

Media Info

• Serial:
  • Journal of the Hydraulics Division
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Drainage basins; Equations; Rainfall; Runoff; Traffic delays
• Old TRIS Terms: Discharge
• Subject Areas: Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00204268
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 25 1970 12:00AM