RESISTANCE TO FLOW IN ALLUVIAL CHANNELS

A direct method of predicting flow resistance and uniform velocity in alluvial channels is developed. The method covers all known bed-form regimes and not only eliminates trial-and-error computations and use of rigid-boundary channel flow formulas but also avoids the difficulties associated with the use of the various existing alluvial channel flow computation techniques. The study shows that the Darcy-Weisbach friction factor can be expressed as a unique function of the ratio of the bed form and grain shear stress components for any anticipated discharge and flow geometry, the bed-form shear component being uniquely determinable from the flow and channel material characteristics. The results confirm that the friction factor is nonconstant but varies with the bed-form regime. The applicability of the method to laboratory flumes, field canals, and natural rivers is illustrated.

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: p. 665-679
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00097216
  • Record Type: Publication
  • Report/Paper Numbers: ASCE #11352 Proceeding
  • Files: TRIS
  • Created Date: Oct 18 1975 12:00AM