Analysis of Urban Drainage Networks Using Gibbs' Model: A Case Study in Seoul, South Korea

Title
Analysis of Urban Drainage Networks Using Gibbs' Model: A Case Study in Seoul, South Korea
Author(s)
서용원황준식노성진[노성진]
Keywords
HYDROLOGIC MODEL; CLIMATE-CHANGE
Issue Date
201508
Publisher
MDPI AG
Citation
WATER, v.7, no.8, pp.4129 - 4143
Abstract
Drainage networks are essential compartments in an urban infrastructure system for the efficient collection and prompt drainage of flood water. In addition to the advances in numerical techniques on urban flood simulation, the topological characteristics of urban drainage networks and their impacts on flooding have not been investigated thoroughly despite their importance. This study evaluated the urban drainage networks in Seoul, South Korea, in terms of the network configuration and its implication for peak flows and flood mitigation. Gibbs' model was used to analyze the network configuration of 31 urban catchments with various slope ranges. The results showed that urban drainage networks can be less efficient than river in nature in terms of the drainage time, which is counter-intuitive. On the other hand, the analysis showed that efficient networks have risks of flood concentration and, hence, increase potential flood risks. This study showed that efficient networks tend to have higher peak flows at the outlet and vice versa. Therefore, an alternative drainage network layout, which is less efficient and more sinuous, was introduced and it resulted in reduced peak flows and flooding. This result shows managing a proper drainage network layout can contribute to flood mitigation in urban catchments.
URI
http://hdl.handle.net/YU.REPOSITORY/31393http://dx.doi.org/10.3390/w7084129
ISSN
2073-4441
Appears in Collections:
공과대학 > 건설시스템공학과 > Articles
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