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 : Dam Break Generated Flow Behaviour in Storm Drains
Dam Break Generated Flow Behaviour in Storm Drains
Author : Xiangyu Sun, Gustaaf Kikkert and Chii Shang
In storm drains of coastal cities, anaerobic condition may exist in the sediment layer resulting in sulfate reducing bacteria producing hydrogen sulfide (H S) as a metabolism by-product which 2 causes a nuisance for local people. A sustainable solution for this odor emission problem is to introduce iron granules into the storm drain, which oxidize the odorous H S to odorless substances, and to 2 regenerate the iron granules when exhausted by reacting with a small amount of oxygen (Sun et al., 2013). By installing a gate-mechanism at the end of the drain where it discharges into the sea, close the gate during low tide and rapidly open the gate during high-tide, a dam break flow can be generated. The current study investigates the feasibility of utilizing the natural energy and turbulence of the dam-break generated flow to mix the exhausted iron particles, sediments and oxygen to assist in the regeneration process. Dam break experiments were carried out in a scaled-down storm drain model attached to a relatively large reservoir, with and without sediments present in the storm drain and with and without iron particles added to the sediments. The results confirm that the dam-break generated flow can assist with recovery of the sulphide removal capacity of the iron particles; however the recovery potential is much higher near the gate than further into the storm drain. The effect of different types of dam break flows on the recovery potential appears to be small.
File Size : 358,292 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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