Accession Number:

AD0606499

Title:

FLOW RESISTANCE COEFFICIENTS OF THREE SIZES OF CAST-IN-PLACE CONCRETE PIPE,

Descriptive Note:

Corporate Author:

BUREAU OF RECLAMATION DENVER COLO

Personal Author(s):

Report Date:

1964-08-27

Pagination or Media Count:

47.0

Abstract:

Hydraulic resistance coefficients were determined from head loss measurements made in 48-, 42-, and 36-inchdiameter cast-in-place concrete pipe installations. Data were obtained with the pipes flowing full at discharges less than the design values from about 10 cubic feet per second to 25 cubic feet per second. Pipe test reaches varied from 1,240 to 3,895 feet. The hydraulic grade line was measured in 10-inch-diameter air vents used as piezometers discharges were measured using a rectangular weir. Sufficient data were obtained to calculate flow resistance coefficients using the Darcy-Weisbach, Manning, and Scobey equations. The flow resistance coefficients for the 48- and 42-inch pipe and one reach of 36-inch pipe may contain residual losses produced by pipe entrance flow patterns, but the resistance coefficients for one reach of 36-inch pipe are believed to be representative of the values to be expected in long straight reaches. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE