Investigation of Containment Area Design to Maximize Hydraulic Efficiency.
Final rept. Jun 76-Jun 77,
GALLAGHER (BRIAN J) AND CO INC LOS ANGELES CA
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This study was conducted to investigate methodologies for improving the hydraulic efficiencies of dredged material containment areas and to develop general guidelines for the proper design and operation of containment areas and their inlet and outlet arrangements. The study consisted of a a review of published literature and technical reports, b site visits and field tests at ten active disposal areas to obtain recent operational data, c development of a mathematical model and computer programs to predict flow patterns and retention times of different containment area configurations, and d formulation of a general methodology for the design of efficient containment areas. It was concluded that the addition of spur dikes to increase the effective length-to-width ratio, prevent short-circuiting between inlet and outlet, and retard wind-induced circulation was the most economical method of maximizing hydraulic efficiency, particularly for large, square-shaped areas. Other recommendations include the specification of minimum ponding depths based on selective withdrawal principles and the design of long, rectangular weirs to prevent flow concentration and resuspension problems.
- Civil Engineering