MANNING'S ROUGHNESS FOR ARTIFICAL GRASSES

Roughnesses of three types of artificial grass are investigated. Artifical grass consists of a mattress that simulates the soil surface where groups of grass are fixed in longitudinal and radial rows. The experiments are conducted in rectangular and triangular laboratory flumes. The following conclusions can be drawn. The n-value was found to be dependent on the flow depth and on the Reynolds number at low range of depths. It was shown to be independent of the flow parameters at high range of depths. The constant roughness coefficient values for the higher discharge were n=0.032, n=0.020 for the different artificial grasses. These n-values are in good agreement with the experimental results for "real" grass found in the literature. It may be concluded, therefore, that artificial grass will be a useful material when simulating grass in the hydraulic laboratory. /Author/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339437
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Graf, W H
  • Chhun, V H
• Publication Date: 1976-12

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 413-423
• Serial:
  • Journal of Irrigation and Drainage Engineering
  • Volume: 102
  • Issue Number: IR4
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9437
  • Serial URL: https://ascelibrary.org/journal/jidedh

Subject/Index Terms

• TRT Terms: Grasses; Laboratory tests; Manning requirements; Reynolds number; Roughness; Simulation; Soils
• Subject Areas: Geotechnology; Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00148394
• Record Type: Publication
• Report/Paper Numbers: ASCE #12603
• Files: TRIS
• Created Date: Mar 30 1977 12:00AM