• Title/Summary/Keyword: 구조적 홍수방어대안

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Flood Mitigation Planing for a Basin Using a Decision Tree Model (의사결정나무모형을 이용한 유역내 구조적 홍수방어 대안 도출)

  • Byeon, Sungho;Kang, Hyunjin;Han, Jeongwoo;Kim, Tae-Woong
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.28 no.1B
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    • pp.33-40
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    • 2008
  • Intensive rainfalls in wet season (June~September) result in serious flood damage which is about 95% of natural hazard in Korea. Recently, in order to cope with repeated flood hazard, comprehensive flood control plans have been carried out in large basins in Korea. The plans suggest structural alternative plans for flood mitigation as well as non-structural plans. In this study, a practical method using a decision tree was developed to systematically allocate structural facilities for flood control, which maximizes the flood control capacity in a basin. This study also presents a practical guidance to organize structural defensive alternatives for a comprehensive flood control plan in a large basin.

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Development of a Policy Assessment Mothed for Structural Flood Defensive Alternatives (구조적 홍수방어 대안의 정책성 평가 방법 개발)

  • Byeon, Sung-Ho;Lee, Jeong-Ho;Ahn, Jae-Hyun;Kim, Tae-Woong
    • 한국방재학회:학술대회논문집
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    • 2008.02a
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    • pp.703-706
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    • 2008
  • Structural flood defensive alternatives have been evaluated based on economic feasibility, riskiness of safety and sustainability. Social problems associated with structural flood defensive alternatives such as dams, flood control channels, etc. are currently issued. The evaluation items of policy presented in KDI(2001) are should be modified in order to resolve the social problems. Hence, this study conducted a questionnaire survey of public servants, researchers, and engineers to obtain how to determine evaluation items for policy assessment and to compute their weights in the analytic hierarchy process. This study also compared the weights of the items in KDI(2000) with the weights from the survey in this study. The policy assessment weight was estimated higher than KDI(2000). This result suggests that social awareness increases and the analysis of policy becomes important for selecting optimal structural defensive alternatives.

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Application of a Decision Tree to Alternative Plans for the Urban Flood Mitigation (Decision Tree를 이용한 도시유역홍수방어 대안 도출)

  • Byeon, Sung-Ho;Kang, Hyun-Jik;Han, Jeong-Woo;Ahn, Jae-Hyun;Kim, Tae-Woong
    • Proceedings of the Korea Water Resources Association Conference
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    • 2007.05a
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    • pp.726-730
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    • 2007
  • 우리나라는 6월부터 9월까지의 우기에 강우가 집중 발생하는 기상특성으로 인해 자연재해의 95% 이상이 집중호우와 태풍에 의한 풍수해로 집계되고 있을 만큼 홍수피해에 취약하며, 오래전부터 홍수방어에 대한 구조적 대책이 시행되어왔다. 본 연구의 목적은 의사결정기법인 Decision Tree(의사결정나무)를 활용하여 유역종합치수계획의 구조적 홍수방어 최적대안 선정을 위한 후보대안들을 제시하여 홍수저감능력을 효율적으로 극대화 하는데 그 목적이 있다. 본 연구는 유역이 가지고 있는 치수적 기능을 최대한 살리고 상 하류의 유기적인 방어 기능을 도모하고자 하였으며, 또한 도시유역 홍수방어 대안 조합 지침을 마련하여 실무에 적용가능한 안을 제시하였다.

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A study of Spatial Multi-Criteria Decision Making for optimal flood defense measures considering regional characteristic (지역특성을 고려한 홍수방어대안 제시를 위한 공간 다기준의사결정 기법 적용 방안 연구)

  • Lee, Eunkyung;Ji, Jungwon;Yi, Jaeeung
    • Journal of Korea Water Resources Association
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    • v.51 no.4
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    • pp.301-311
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    • 2018
  • Recently, the flood inundation caused by heavy rainfall in urban area is increasing due to global warming. The variability of climate change is described in the IPCC 5th report (2014). The precipitation pattern and hydrological system is varied by climate change. Since the heavy rainfall surpassed the design capacity of the pipeline, it caused great damage in metropolitan cities such as Seoul and Busan. Inundation in urban area is primarily caused by insufficient sewer capacity and surplus overflow of river. Inundation in urban area with concentrated population is more dangerous than rural and mountains areas, because it is accompanied by human casualties as well as socio-economic damage to recover destruction of roads, brides and underground spaces. In addition, various factors such as an increase in impervious area, a short time of concentration to outlet, and a shortage of sewer capacity's lack increase flooding damage. In this study, flood inundation analysis was conducted for vulnerable areas using XP-SWMM. Also, three structural flood prevention measures such as drainage pipeline construction, detention reservoir construction, and flood pumping station construction are applied as flood damage prevention alternatives. The flood data for each alternative were extracted by dividing the basin by grid. The Spatial Compromise Programming are applied using flood assessment criteria, such as maximum inundation depth, inundation time, and construction cost. The purpose of this study is to reflect the preference of alternatives according to geographical condition even in the same watershed and to select flood defense alternative considering regional characteristics.