New Strategies on Urban Flood Management under Climate Change
The objectives of this meeting is to address the various approaches and methods used to predict and manage on Typhoon and flood disaster during recent years. It will contribute to exchanging advanced experiences in the areas of integrated flood management and implementation. By sharing of new, innovative developments in Typhoon(Hurricane) and flood risk reduction methodologies especially in large urban areas, we will explore countermeasures to sustain balance between structural and nonstructural approaches.
The major outcomes are expected as follows.
|16:30-16:35(5’)||Opening remark||Prof. Kun Yeun Han, KWRA (Korea Water Resources Associ-ation) and KNU(Kyungpook National Univ)|
|16:35-16:55(20’)||Assessment of flood hazard zoning for disaster mitigation||Prof. Gwo Fong Lin. National Taiwan University|
|16:55-17:15(20’)||On the estimation of flood damage occurred by heavy rainfall and storms||Prof. Hung Soo Kim, Inha University|
|17:15-17:35(20’)||Overcoming lack of data for flood hazard assessment: Cost effective high quality DEM and rainfall proxies||Prof. Shie-Yui Liong, National University of Singapore|
|17:35-17:55(20’)||Urban flash flood warning system using dual-polarization radar||Dr. Seokhwan Hwang, Dr. Dongryul Lee, KICT(Korea Institute of Civil Engineering and Building Technology)|
|17:55-18:15(20’)||Development of a distributed hydrological model for near real time flood forecasting using extended Muskingum method||Prof. Gwangseob Kim, Kyungpook National University and Director, Disaster Prevention Research Institute, KNU|
|18:15-18:30(15’)||Panel Discussion||5 Panelists|
Assessment of flood hazard zoning for disaster mitigation (Gwo Fong Lin, National Taiwan University)
- Regarding the model input, the proposed model of flood hazard zoning with the flood susceptibility values of the self and surrounding grids do improve the assessment performance.
- The proposed model “RF-SOM” can produce reliable flood hazard zoning maps.
- The land use, distance to drainage channel, elevation, slope and the maximum 1-hour rainfall have great influence on flood hazard zoning.
On the estimation of flood damage occurred by heavy rainfall and storms (Hung Soo Kim, Inha University)
- This study suggest improvement method for 5 type flood losses such as building, vehicle,crop, and casualty/victims.
- Building damage and losses: The unit of analysis used individual building objects and CSVR concept was used to determine building contents value. This research developed building vulnerability curve using various data such as damage survey data, claim data, and expert opinions.
- Vehicle damage and losses: It was included as a new type of loss not covered previously, and analysis procedure was proposed.
- Crop damage and losses : It’s changed assessment criteria and representative 10 crops, and updated unit required for assessment.
- Life losses(Casualty, victims) : The PAR concept was used and analysis procedure was proposed based on occurrence probability.
Overcoming lack of data for flood hazard assessment: Cost effective high quality DEM and rainfall proxies (Shie-Yui Liong, National University of Singapore)
- This study presented and demonstrated: (a) a cost-effective and high quality DEM improvement scheme; (b) reasonably reliable rainfall proxies resulting from regional climate model.
- The in-house developed Improved SRTM DEM technique showed visually much clearer drainages, roads, buildings, etc than their counterparts in SRTM DEM; similarly, it is more superior than the German Aerospace DLR’s TanDEM-X (Euros 30/km2). The DEM improvement technique was demonstrated in various dense urban areas.
- ANN trained in Nice (France) generates more accurate DEMs in Singapore and Greater Jakarta than their counterparts SRTM DEMs.
- Improved DEM and derived IDF curves were then applied to flood risk assessment study, using Mike21 FM, in Greater Jakarta
- The resulting generated flood maps by ANN are useful for flood mitigation measures.
Urban flash flood warning system using X-band dual-polarization radar (Dongryul Lee, Korea Institute of Civil Engineering and Building Technology)
- Strengthen the flood safety by developing flood warning technology to secure golden time and improved national disaster response capability
- Improve the pre-flood response abilities by providing flood risk prediction reflecting characteristics of local authorities
- Develop the local sized flood and dynamic flash flood forecasting technologies
- Develop a high performance(HPC) numerical model for spatial-temporal flood prediction on river watershed and HPC flood forecasting platform based on real-time flood location
Development of a distributed hydrological model for near real time flood forecasting using extended Muskingum method (Gwangseob Kim, Kyungpook National University)
- Develop a distributed hydrologic model for near real time flood
- forecasting using extended Muskingum method Improve the model accuracy applying multi-site calibration
- Results showed the possibility of near real time flood forecast for major tributaries using the distributed hydrologic model.
- Develop an urban catchment flood prediction model for near real time inundation occurrence information.
- Results showed the possibility of reasonable near real time flood waring information in urban area. However, there is large room to improve the model accuracy.
- The results of this session are to address the various approaches and methods used to predict and manage on Typhoon and flood disaster during recent years.
- It will contribute to exchanging advanced experiences in the areas of integrated flood management and implement-tation.
- By sharing of new, innovative developments in Typhoon(Hurricane) and flood risk reduction methodologies especially in large urban areas, we could explore countermeasures to sustain balance between structural and nonstructural approaches.
- It is very important to build a resilient society against flood disaster in urban areas, and to perform ICT application for the efficient integrated flood management and implementation. The major messages and outcomes are summarized as follows.
- Qualitative and quantitative methods for rainfall/flood forecasting, mapping and mitigating the flood-related disasters are very important for enhancing flood resilience against climate change
- Integrated flood management should be established for building a resilient society
- Combination of engineering mesasures with social, financial and legal aspects for flood mitigation are should be made within interconnected social system
- New technologies should be continuously adopted for preparing, forecasting and managing flood disasters.