• Title/Summary/Keyword: minimization of flood risk

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Building a Flood Database and Its Utilization to Reduce Flood Risk (수해시 피해경감을 위한 정보의 정비 및 활용)

  • An, Sang-Hyeok;Noguchi, M.
    • Journal of Korea Water Resources Association
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    • v.33 no.6
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    • pp.681-688
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    • 2000
  • For the reduction of flood damage, it is necessary to analyse shelter activities of local residents and to publish information of floodings, In this paper the control factors of individual refuge activities which are major activities to save peoples lives against floodings have been estimated. Decision making factors for mental refuge activity by the questionnaire survey were classified into two categories: internal and external ones. Furthermore, the behaviour patterns of residents for flood risk related to geographical and social factors were derived by the quantification method n. Since spatial layered information using GIS were corrected and estimated to serve citizen's consensus due to flood disaster, it would aid reduction and minimization of flood risk.d risk.

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A Study on the Characteristics of Flood Damage Caused by landslide and Its Minimization Using GIS-The Case Study in the Samwhadong, Donghae city, Kangwondo, Korea

  • Kang, Sang-Hyuk
    • Spatial Information Research
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    • v.10 no.4
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    • pp.493-499
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    • 2002
  • This paper presents the disaster control due to flooding through the case study of Samwhadong, Donghae city, Kangwondo, broken out at 31, August 2002. In order to assess the characteristics of flood damage one must consider social and geological conditions, the factors of flood risk were derived based on GIS. For reduction of flood damage, flood hazard map was prepared for local residents. These information will support refuge activities, it would aid the reduction of flood damage.

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Mapping Inundation Areas by Flash Flood and Developing Rainfall Standards for Evacuation in Urban Settings (GIS를 이용한 도시지역 돌발홍수 침수예상지도 작성 및 대피강우기준 개발)

  • Shin, Sang-Young;Yeo, Chang-Geon;Baek, Chang-Hyun;Kim, Yoon-Jong
    • Journal of the Korean Association of Geographic Information Studies
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    • v.8 no.4
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    • pp.71-80
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    • 2005
  • As local flash flood exceeding planned capacity occurs frequently, localized preparedness and response to flood inundation are increasingly important. Using XP-SWMM model and GIS techniques, this study analyzes inundation areas by local flash flood and develops rainfall standards for evacuation with the case of Sadang-Cheon area, a local stream and its nearby highly populated watershed in the southern part of metropolitan Seoul, Flood inundation areas overflowed from drainage systems are analyzed and mapped by amount of rainfall that is derived from reference levels of stream flow. Rainfall standards for evacuation are comprised of 'watch' (40mm/hr) in preparing for near-future inundation and 'evacuation' (65mm/hr) in responding to realized inundation. The methods suggested by this case study may be applied to other urban areas for sound flood prevention policy measures and thus risk minimization.

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Optimal Reservour Operation for Flood Control Using a Hybrid Approach (Case Study: Chungju Multipurpose Reservoir in Korea) (복합 모델링 기법을 이용한 홍수시 저수지 최적 운영 (사례 연구 : 충주 다목적 저수지))

  • Lee, Han-Gu;Lee, Sang-Ho
    • Journal of Korea Water Resources Association
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    • v.31 no.6
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    • pp.727-739
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    • 1998
  • The main objectives o reservoir optimal operation can be described as follows : maximization of the benefits through optimal allocation of the limited water resources for various purpose; minimization of t도 costs by the flood damage in potential damaging regions and risk of dam failure, etc. through safe drainage of a bulky volume of excessive water by a proper reservoir operation. Reviewing the past research works related to reservoir operation, we can find that the study on the matter of the former has been extensively carried out in last decades rather than the matter of the latter. This study is focused on developing a methodology of optimal reservoir operation for flood control, and a case study is performed on the Chungju multipurpose reservoir in Korea. The final goal of the study is to establish a reservoir optimal operation system which can search optimal policy to compromise two conflicting objectives: downstream flood damage and dam safety-upstream flood damage. In order to reach the final goal of the study, the following items were studied : (1)validation of hydrological data using HYMOS: (2)establishment of a downstream flood routing model coupling a rainfall-runoff model and SOBEK system for 1-D hydrodynamic flood routing; (3)replication of a flood damage estimation model by a neural network; (4)development of an integrated reservoir optimization module for an optimal operation policy.

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