Accession Number : AD0756437

Title :   Old River Low-Sill Control Structure. Report 2. Studies of Riprap Placement Plans.

Descriptive Note : Technical rept. Sep-Dec 55,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s) : Powell,C. J. ; Brasfield,C. W.

Report Date : JUL 1957

Pagination or Media Count : 28

Abstract : Tests of the efficacy of three plans for riprap placement downstream of the low-sill structure were conducted on a 1:36-scale model of the structure with the various sizes (24 in., 18 in., and 12 in.) of riprap reproduced by reducing the prototype sizes by the scale ratio of 36 to 1. A series of general tests were also conducted in a glass-sided flume to determine the velocities required to move the various sizes of riprap used in the Old River plan. Model studies indicate probable failure of all proposed prototype riprap placement plans at a discharge of about 400,000 cfs with a tailwater elevation of 45.0 or below. (Author)

Descriptors :   (*DAMS, *HYDRAULIC MODELS), MODEL TESTS, FLUID FLOW, CONTROL SYSTEMS, CONSTRUCTION MATERIALS, EFFICIENCY, LOUISIANA

Subject Categories : Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE