GEOMETRY OF SCOUR HOLES ASSOCIATED WITH 90 DEGREE SPUR DIKES. TECHNICAL NOTE

The stable pools formed by spur dikes can be a significant factor for improving aquatic habitat in unstable degraded streams. Prediction of the volume and geometry of the scour hole associated with a spur dike yields information that is valuable for assessing the potential benefit to the aquatic habitat. Volumes of the scour hole in the vicinity of model spur dikes were measured in a laboratory flume under clear-water overtopping flows. Spur dike length, flow depth, and shear velocity ratio were varied in the experiments and found to significantly influence the volume of the scour hole. For overtopping flows, the ratio of the flow depth to the spur dike height was found to be an important control on the geometry of the resulting scour hole. At higher flow depth to spur dike height ratios, the location of the maximum depth of scour changed from the upstream point of the dike toward the channel bank and caused a secondary scour zone to form downstream of the spur dike. A preliminary technique is proposed to predict the volume of scour for spur dikes perpendicular to the bank.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/8672558
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Kuhnle, R A
  • Alonso, C V
  • Shields Jr, F D
• Publication Date: 1999-9

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 972-978
• Serial:
  • Journal of Hydraulic Engineering
  • Volume: 125
  • Issue Number: 9
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9429
  • Serial URL: https://ascelibrary.org/journal/jhend8

Subject/Index Terms

• TRT Terms: Areas; Channels (Waterways); Flow; Flumes; Geometry; Laboratory tests; Length; Overtopping; Scour; Spur dikes; Velocity; Volume
• Subject Areas: Highways; Hydraulics and Hydrology; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 00768786
• Record Type: Publication
• Contract Numbers: I-566-97-02-C
• Files: TRIS
• Created Date: Sep 5 1999 12:00AM