EXPERIMENTAL DETERMINATION OF HEAD LOSSES IN STORMWATER SYSTEMS

A laboratory model has been used to study head losses in a stormwater drainage junction pit. The model layout consisted of two inlet pipes and one outlet pipe. The upper inlet pipe and the outlet pipe were placed in a straight line, with the lateral pipe entering the pit at 90 degrees. Changes in hydraulic grade line at the pit were expressed as the product of a loss coefficient times the velocity head in the outlet pipe. Experimentally determined values of the loss coefficients were found to be generally consistent with previously published results. The major factor in determining the magnitude of the loss coefficients was found to be the proportion of the total flow which entered the pit from the upper pipe. Values of the loss coefficients were found to vary systematically from 0.2 to 2.4, indicating that the commonly accepted value of 1.5 may in some cases overestimate and in others underestimate the head losses occurring. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0858251930
• Supplemental Notes:
  • This paper was presented during the Second National Conference on Local Government Engineering, Brisbane, 19-22 September 1983.
• Corporate Authors:

  Institution of Engineers

  11 National Circuit
  Barton, A.C.T.,   Australia 

  Department of Transport, Australia

  Department of Construction House, 470 Northbourne Avenue
  Canberra, A.C.T.,   Australia 
• Authors:
  • Degroot, C F
  • Boyd, M J
• Conference:
  • This paper was presented during the Second National Conference on Local Government Engineering, Brisbane, 19-22 September 1983.
• Publication Date: 1983

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 214-218

Subject/Index Terms

• TRT Terms: Coefficients; Conferences; Design; Drainage; Head; Intersections; Laboratories; Laboratory tests; Loss and damage; Mathematical models; Pipe; Pressure; Scale models; Structural models; Testing equipment; Tests
• Uncontrolled Terms: Models
• Old TRIS Terms: Head loss
• ITRD Terms: 6410: Coefficient; 8525: Conference; 9011: Design (overall design); 2937: Drainage; 455: Junction; 6237: Laboratory (not an organization); 9040: Loss; 6205: Model (not math); 3361: Pipe; 5412: Pressure; 6255: Test
• Subject Areas: Bridges and other structures; Design; Highways; Hydraulics and Hydrology; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 00385932
• Record Type: Publication
• Source Agency: ARRB
• ISBN: 0-85825-193-0
• Report/Paper Numbers: 83/11
• Files: ITRD, TRIS, ATRI
• Created Date: Jun 28 1984 12:00AM