BAFFLED APRON AS SPILLWAY ENERGY DISSIPATOR

Hydraulic model investigations were performed to determine basic design criteria for a baffled apron spillway as an energy dissipator. Described are the effects of baffle block heights and spacing of the hydraulic efficiency of the system. Impact pressures were measured on the upstream faces of the blocks to determine impact forces. Pressures on the side, top, and back of the blocks were also measured to determine the possibility of cavitation damage. Special consideration was given to develop alternative entrances to the baffled spillway. Three entrance configurations are proposed, two of which will not increase the upstream water level. The third entrance is similar to the conventional type used in contemporary designs. Typical design procedures are outlined. Included are the determination of ideal design discharge criteria which might be less than the expected maximum and how to modify the structure to handle discharges greater than the design. /Author/

• Supplemental Notes:
  • Presented at the Hydraulics Division Specialty Conference on "Mathematical and Physical Modeling in Hydraulic Water Resources Engineering," Purdue University, West Lafayette, Indiana, August 4-6, 1976.
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Rhone, T J
• Publication Date: 1977-12

Media Info

• Features: Appendices; Figures; References;
• Pagination: p. 1391-01
• Serial:
  • Journal of the Hydraulics Division
  • Volume: 103
  • Issue Number: HY12
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Cavitation (Mechanics); Design; Dissipation; Hydraulic equipment; Hydraulic structures; Shock resistance; Spillways
• Uncontrolled Terms: Hydraulic models; Impact strength
• Old TRIS Terms: Aprons; Discharge; Hydraulic systems; Substitutes
• Subject Areas: Design; Energy; Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00172398
• Record Type: Publication
• Report/Paper Numbers: ASCE 13373 Proceeding
• Files: TRIS
• Created Date: Apr 12 1978 12:00AM