Old River Control Auxiliary Structure. Hydraulic Model Investigation
Abstract
Model tests of the Old River Control Auxiliary Structure were conducted to investigate and develop a design that would provide satisfactory flow characteristics in the approach channel, at the abutments, over the spillway, in the stilling basin, and in the exit channel, and determine the adequacy of the riprap protection proposed for the approach and exit channels. The approach channel provided satisfactory flow to the spillway for all anticipated flow conditions. A design for the approach training walls was developed. Spillway discharge characteristics were determined for the following flow conditions: free uncontrolled flow, submerged uncontrolled flow, free controlled flow, and submerged controlled flow. Pressures measured on the crest indicated no negative pressure for any anticipated flow conditions. Hydraulic performance of the stilling basin was improved by elevating the stilling basin apron 15 ft and providing two rows of 15-ft-high baffles and a 12-ft-high end sill. Tests indicated that the downstream portion of the stilling basin training wall could be lowered for a length of 63 ft without impairing hydraulic performance. The magnitude and frequency of the hydraulic forces acting on the stilling basin sidewalls were computed. The invert of the exit channel was elevated 5 ft for sediment transport and hydraulic purposes. The riprap design developed for the exit channel provided adequate protection for anticipated flow conditions, including 90,000 cfs passing through a single bay.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1988
- Accession Number
- ADA196618
Entities
People
- B. P. Fletcher
- P. Bhramayana