IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 3 - WATER ENGINEERING AND CIVILIZATION : Baffle Drop Structures for Diversion of Storm Water to Underground Tunnels
Baffle Drop Structures for Diversion of Storm Water to Underground Tunnels
Author : A. Jacob Odgaard, Troy C. Lyons, Andrew J. Craig, Anthony Margevicius and David Servidio
A baffle-drop structure is a flow conveyance structure that can be used for transport of urban storm water down to underground storage tunnels. The water cascades down the structure from baffle to baffle and plunges into a pool at the bottom from where it is conveyed to the tunnel via an adit. The structure has been used successfully in a number of urban drainage schemes for design discharges up 3 3 t o about 4.2 m \s (150 ft \s). Using a series of laboratory experiments, an analysis has been tested and validated that may be used for design of structures for larger design discharges. The analysis provides a dimensionless relationship between key variables, including design discharge, shaft diameter, baffle spacing, and position of a vertical wall that divides the shaft into dry and wet portions. The laboratory studies showed that by using this relationship the shaft can be designed to maintain atmospheric pressure th roughout its height with little or no air being entrained into the tunnel. The laboratory results are compared with performance data from the (limited number of) structures already in service.
File Size : 377,590 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
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