FORMATION OF DUNES AND ANTIDUNES IN OPEN CHANNELS

THE FORMATION OF DUNES AND ANTIDUNES ON THE ERODIBLE BED OF AN OPEN CHANNEL IS STUDIED ANALYTICALLY AS A PROBLEM OF STABILITY OF THE ERODIBLE BED. THE PHASE LAG EXISTING BETWEEN THE LOCAL SEDIMENT-TRANSPORT RATE AND THE LOCAL VELOCITY ON THE BED PLAYS AN ESSENTIAL ROLE IN THE FORMATION OF THE SAND WAVES. A PHYSICAL MODEL FOR THE TRANSPORT OF SEDIMENT OVER A WAVY BED IS PRESENTED AND A QUANTITATIVE EXPLANATION OF THIS PHASE LAG IS DEVELOPED. THE REGIONS OF OCCURRENCE OF DUNES, FLAT BEDS, AND ANTIDUNES ARE EXAMINED IN DETAIL. PREDICTED REGIONS OF OCCURRENCE OF THOSE BED CONFIGURATIONS ARE COMPARED WITH EXPERIMENTAL RESULTS PREVIOUSLY SUMMARIZED BY KENNEDY, THE COMPARISON SHOWING A GOOD AGREEMENT. /ASCE/

• Supplemental Notes:
  • Vol 96, No HY2, PROC PAPER 7056, PP 357-366, 8 FIG, 4 REF,
• Authors:
  • Hayashi, T
• Publication Date: 1970-2

Media Info

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

Subject/Index Terms

• TRT Terms: Alluvium; Dune sands; Erosion; Fluid mechanics; Hydraulics; Open channels; Sediments; Streambeds
• Old TRIS Terms: River beds
• Subject Areas: Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00204269
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 25 1970 12:00AM