MEASUREMENT AND ANALYSIS OF NATURAL-TYPE SURFACE ROUGHNESSES AFFECTING FLUID FLOW

An investigation is reported of the feasibility of using the statistical distributions of roughness heights, slopes, and curvatures to characterize hydraulically rough surfaces. The direct measurement technique, such as has been employed to find the root-mean-square value of roughness heights, is evaluated. When automatically measured and recorded profiles of developing sand bed roughness became available, it was found that each distribution approaches a well defined limit, suggesting that 95 percentile values may be used to characterize natural-type roughnesses.

• Corporate Authors:

  University of Connecticut, Storrs

  Institute of Water Resources
  Storrs, CT  United States 
• Authors:
  • Posey, C J
• Publication Date: 1972-8-14

Media Info

• Pagination: 8 p.

Subject/Index Terms

• TRT Terms: Hydrodynamics; Roughness; Skin resistance; Surface course (Pavements)
• Old TRIS Terms: Hydrodynamic roughness
• Subject Areas: Design; Hydraulics and Hydrology; Marine Transportation;

Filing Info

• Accession Number: 00041735
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: OWRR-A-020-CONN(1)
• Contract Numbers: DI-14-01-0001-1626
• Files: TRIS
• Created Date: Mar 19 1973 12:00AM