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Vortex energy dissipator for San Diego ocean outfall – laboratory investigations

Brooks, Norman H. and Blackmer, William H. (1962) Vortex energy dissipator for San Diego ocean outfall – laboratory investigations. W. M. Keck Laboratory of Hydraulics and Water Resources Report, 5. California Institute of Technology , Pasadena, CA. (Unpublished)

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The sewage effluent from the new sewage treatment plant for the City of San Diego, located on a bluff 95 feet above sea level on Point Lorna, is discharged to the ocean through a long submarine outfall pipe. Under almost all conditions of flow, the hydraulic head at the treatment plant exceeds that required for flow through the outfall. Therefore, the excess energy must be dissipated in a special hydraulic drop structure located on the shoreline between the treatment plant and the ocean outfall. The laboratory model investigation described herein basically sought to find a method for dissipating this excess energy safely without heavy entrainment of air into the flow in the ocean outfall. Such air entrainment could cause unsteady conditions of the pipe flow, and possibly bubbling at the point of discharge in the ocean, both of which must be avoided. The responsibility of this laboratory was to develop the hydraulic principles and a recommended hydraulic configuration which would provide assurance that the prototype to be designed by the sponsors (Holmes and Narver-Montgomery) would give satisfactory hydraulic performance.

Item Type:Report or Paper (Technical Report)
Additional Information:© 1962 W. M. Keck Laboratory of Hydraulics and Water Resources. California Institute of Technology. The authors would like to express their appreciation to Professor Vito A. Vanoni for his assistance and valuable criticism, offered generously throughout the course of this investigation. The writers wish to acknowledge with sincere thanks the indispensable and capable assistence of the following members of the laboratory staff: Mr. Elton F. Daly for constructing the various models and offering innumerable practical suggestions; Mr. Robert L. Greenway for assisting in the construction of the models and performing much of the photographic work; Mr. Arthur N. Schmitt for assisting in the detailed designing of the models, running tests, and preparing many of the figures for the report; Mr. Carl Eastvedt for still and motion-picture photography of the final large model; Mr. Ronald Parrrian for preparing some of the figures for the report; and finally Mrs. Shirley Graham for handling all secretarial work, including typing the manuscript and coordinating its publication during absences of the authors following completion of the work.
Group:W. M. Keck Laboratory of Hydraulics and Water Resources
Series Name:W. M. Keck Laboratory of Hydraulics and Water Resources Report
Issue or Number:5
Record Number:CaltechKHR:KH-R-5
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Usage Policy:You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.
ID Code:25979
Deposited By: Imported from CaltechKHR
Deposited On:03 Jun 2004
Last Modified:03 Oct 2019 03:10

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