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도시홍수 피해 저감을 위한 최적의 표면유출 네트워크 기반의 그린 인프라스트럭쳐 계획Green Infrastructure Planning for Urban Flood Damage Reduction based on an Optimal Surface Runoff Network

Other Titles
Green Infrastructure Planning for Urban Flood Damage Reduction based on an Optimal Surface Runoff Network
Authors
한효주송기환이우균전진형
Issue Date
2020
Publisher
한국기후변화학회
Keywords
Urban Flood; Surface Runoff; Impervious Area; Least-Cost Paths (LCP) Analysis; Green Infrastructure Planning
Citation
한국기후변화학회지, v.11, no.6, pp.739 - 753
Indexed
KCI
Journal Title
한국기후변화학회지
Volume
11
Number
6
Start Page
739
End Page
753
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/60306
DOI
10.15531/KSCCR.2020.11.6.739
ISSN
2093-5919
Abstract
Urban flooding is caused by an increase in surface area as a side effect of both urbanization and the natural limitations of drainage system capacity to cope with surface runoff. Appropriate measures are necessary to respond to urban flood damage. To respond to areas with surface runoff damage due to the prevalence of urban floods, this research provides green infrastructure planning by deriving optimal routes. This is accomplished by conducting analysis with respect to surface runoff networks as well as selecting target areas for green infrastructure applications. Our proposed green infrastructure planning process is presented by applying it to Daejeon Metropolitan City. A Least-Cost Paths analysis was utilized to derive the optimal surface runoff network, and a flood vulnerability analysis was performed by selecting target areas for green infrastructure planning. Finally, the types of green infrastructure were classified based on a literature review to suggest applicable types of green infrastructures within each target area. The main results of applying this method to Daejeon Metropolitan City are as follows. First, the optimal surface runoff network was derived from the starting point of the Gap Stream to the destination point of Se-dong basin area within Yuseong-gu. Second, seven cells with high flood vulnerability were derived where the green infrastructure would be applied as a priority. Finally, the green infrastructure considering its application in each cell was derived, including green alleys, detention ponds, bio-swales, and permeable pavement. This research was able to establish the proposed method by combining the optimal surface runoff network derivation with green infrastructure planning. This process is universally applicable to areas where urban flood damage occurs, including Daejeon Metropolitan City, where this case study was conducted.
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