ENERGY DISSIPATION ON A ROUGH SLOPE

Assuming long normally incident waves, described by linear theory, the energy dissipation on a rough slope is accounted for by introducing a term expressing the bottom shear stress. The theoretical development leads to a determination of the reflection coefficient as a function of the horizontal extent of the slope relative to the wave length in front of the slope and an equivalent slope friction factor. A method for the accurate determination of the reflection coefficient from experimental data is developed and used to establishe an empirical relationships for the frictional characteristics of a rough slope. The resulting semi-empirical procedure for estimating the reflection coefficient of rough slopes is shown to yield fairly accurate results. The results show that bottom friction may account for the dissipation of 80% of the incident wave energy on a slope as large as 13 where the incicent waves show no sign of breaking.

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Madsen, O S
  • White, S M
• Publication Date: 1976-2

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 31-48
• Serial:
  • Journal of Waterways and Harbors Division
  • Volume: 102
  • Issue Number: WW1
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Coasts; Dissipation; Friction; Reflection; Shear stress; Slopes; Wavelength
• Old TRIS Terms: Coastal; Frictional properties
• Subject Areas: Energy; Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00131188
• Record Type: Publication
• Report/Paper Numbers: ASCE +11904
• Files: TRIS
• Created Date: May 14 1976 12:00AM