MECHANICS OF SHEET FLOW UNDER SIMULATED RAINFALL

FRICTION FACTORS ARE PRESENTED FOR SPATIALLY VARIED SHEET FLOW WITH RAINFALL ON A HYDRAULICALLY SMOOTH SURFACE AS OBTAINED FROM BOTH SURFACE PROFILE AND HOT FILM SURFACE PROBE MEASUREMENTS. THE RESULTS ARE PRESENTED IN THE FORM F= C/R, IN WHICH C INCREASES WITH RAINFALL INTENSITY AND SURFACE SLOPE. A TWO PART VELOCITY PROFILE MATHEMATICAL MODEL BASED ON VONKARMAN'S SIMILARITY HYPOTHESIS IS PRESENTED AND CORRELATED WITH HOT FILM MEASUREMENTS. RELATIVE LONGITUDINAL TURBULENCE INTENSITY PROFILES WITH RAINFALL ARE CHARACTERIZED BY A SHARP INCREASE IN RELATIVE INTENSITY NEAR THE SURFACE AND A GENERAL INCREASE THROUGHOUT THE DEPTH WITH INCREASING RAINFALL. TURBULENT ENERGY SPECTRAL ANALYSES INDICATE THAT THE RAINFALL CAUSES A SHIFT OF THE ENERGY CONTENT TO HIGHER FREQUENCIES THAN FOR THE CASE OF UNIFORM FLOW AT THE SAME REYNOLDS NUMBER. /AUTHOR/

• Supplemental Notes:
  • Vol 97, No HY9, PROC PAPER 8373, PP 1367-1386, 7 FIG,
• Authors:
  • Yoon, Y N
  • Wenzel, H G
• Publication Date: 1971-9

Media Info

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

Subject/Index Terms

• TRT Terms: Drainage; Equations; Erosion; Flow; Friction; Impacts; Rainfall; Reynolds number; Streamflow; Turbulence; Water
• Uncontrolled Terms: Rainfall intensity
• Old TRIS Terms: Sheet erosion
• Subject Areas: Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00204389
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 25 1971 12:00AM