PREDICTING SEDIMENT YIELD IN WESTERN U. S. A.

AN EQUATION FOR PREDICTING THE AVERAGE ANNUAL SEDIMENT YIELD FROM SHEET EROSION IS DEVELOPED THROUGH MULTIPLE REGRESSION ANALYSIS. MOST OF THE VARIATION IN YIELD IS EXPLAINED WITH DATA OBTAINED BY MEASUREMENT OF FOUR WATERSHED CHARACTERISTICS. A CLIMATIC FACTOR AS AN INDIRECT EXPRESSION OF VEGETATIVE COVER, THE AVERAGE WATERSHED SLOPE, AND TWO SOIL FACTORS ARE THE VARIABLES USED. A HIGH RATE OF CORRELATION IS ACHIEVED BETWEEN MEASURED SEDIMENT AND COMPUTED SEDIMENT UNDER ALL CIRCUMSTANCES EXCEPT AT LOW RATES OF SEDIMENTATION. A GOOD CORRELATION OF COMPUTED WITH MEASURED SEDIMENT YIELDS IS OBTAIN EXCEPT AT THE LOWER RATES OF SEDIMENTATION. IMPROVE- MENTS IN PREDICTIVE VALUE CAN BE ACHIEVED WITH EXPERIENCE IN JUDGING THE NECESSARY ADJUSTMENTS IN THE VEGETATION COVER FACTOR, THROUGH MORE INTENSIVE SOIL SAMPLING AND BY USE OF ONLY LONGTIME SEDIMENT YIELDS AS THE DEPENDENT VARIABLE. THE DATA SELECTED FOR THIS ANALYSIS ARE INTENDED TO EXCLUDE THE INFLUENCE OF EXTENSIVE GULLY OR STREAM BANK EROSION ON SEDIMENT YIELD.

• Supplemental Notes:
  • 2 APP
• Authors:
  • Flaxman, E M
• Publication Date: 1972-12

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 2073-85
• Serial:
  • Journal of the Hydraulics Division
  • Volume: 98
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Erosion; Forecasting; Hydraulics; Rates; Sedimentation; Statistical analysis
• Subject Areas: Data and Information Technology; Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00204486
• Record Type: Publication
• Report/Paper Numbers: No Hy 12
• Files: TRIS
• Created Date: May 15 1973 12:00AM