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Water 2017, 9(4), 246; doi:10.3390/w9040246

Design and Operation of Decentralized Reservoirs in Urban Drainage Systems

School of Civil, Environmental and Architectural Engineering, Korea University, 02841 Seoul, Korea
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Academic Editor: Peter J. Coombes
Received: 21 February 2017 / Revised: 16 March 2017 / Accepted: 29 March 2017 / Published: 31 March 2017
(This article belongs to the Special Issue Urban Water Challenges)
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Abstract

Poor drainage of urban storm water can lead to urban inundation which presents a risk to people and property. Previous research has presented various measures to prevent and reduce urban flooding and these measures can be classified into costly but effective structural measures, and economical but less effective non-structural measures. This study suggests a new approach to reduce urban flooding by combining structural and non-structural measures in a target watershed in Seoul, South Korea. Inlet design modification in a detention reservoir (Decentralized Reservoir, DR) is examined in conjunction with combined inlet/outlet management for the DR. Monitoring nodes used to control DR inlet/outlet operations are selected by locating the first flooding node, maximum flooding node and DR inlet node. This new approach demonstrates outstanding flood volume reduction for historical flooding events that occurred in Seoul during 2010 and 2011. Flood volumes during the 2010 event using the combined inlet/outlet operation in the DR were between 1656 m3 and 1815 m3 compared to a flood volume of 6617 m3 using current DR operation. Finally, the suggested operating level for the DR based on the best hydraulic section, system resilience index, and local regulations is 1.2 m. View Full-Text
Keywords: urban flooding; decentralized reservoirs; inlet/outlet operation; inlet design urban flooding; decentralized reservoirs; inlet/outlet operation; inlet design
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Lee, E.H.; Kim, J.H. Design and Operation of Decentralized Reservoirs in Urban Drainage Systems. Water 2017, 9, 246.

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