SIMILARITY IN UNLINED IRRIGATION CANAL SYSTEMS

DATA FROM THREE IRRIGATION CANAL SYSTEMS ARE EXAMINED, AND THE OBSERVED VARIATIONS IN SOME RELEVANT FLOW PARAMETERS ARE CONSIDERED IN RELATION TO THE CONDITIONS WHICH APPLY IN THE CASE OF COMPLETELY SIMILAR MOVABLE BED CHANNEL FLOWS. IT CAN BE SEEN THAT THE CANALS FLOW WITH RIPPLE, DUNE, OR TRANSITIONAL BED REGIMES, AND THAT THE BED MATERIAL SIZE DECREASES IN A DOWNSTREAM DIRECTION IN SUCH A WAY THAT THE RATIO OF THE MEAN VELOCITY OF FLOW TO THE FALL VELOCITY OF BED MATERIAL TENDS TO REMAIN CONSTANT. IT IS SHOWN THAT IT IS IMPOSSIBLE FOR COMPLETE SIMILARITY TO EXIST BETWEEN THE FLOWS IN REAL ALLUVIAL CHANNELS, AND ACCORDINGLY AN ATTEMPT IS MADE TO DEFINE CONDITIONS OF QUASISIMILARITY BASED ON THE STAGE OF DEVELOPMENT OF THE BED FORMATION. /ASCE/

• Supplemental Notes:
  • Vol 96 No HY1, PP 13-28, 11 FIG, 3 TAB, 14 REF, 2 APP
• Authors:
  • Smith, KVH
• Publication Date: 1970-1

Media Info

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

Subject/Index Terms

• TRT Terms: Alluvium; Canal linings; Canals; Channel flow; Flow; Hydraulics; Irrigation canals; Streamflow; Water
• Uncontrolled Terms: Open channel flow
• Subject Areas: Highways; Hydraulics and Hydrology; Marine Transportation;

Filing Info

• Accession Number: 00204259
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 20 1970 12:00AM