Flood Mapping in Korea Yang-Su Kim

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Presentation transcript:

Flood Mapping in Korea 2003. 10 Yang-Su Kim National Institute for Disaster Prevention Ministry of Government Administration and Home Affairs Republic of Korea

Background Global costs of extreme weather events(IPCC, 2001) 1950 1960 1970 1980 1990 1998 10 20 30 40 50 60 Annual damage(thousand million U.S. dollars) Total economic loss Average economic loss in ten years Years Records of flood frequency and magnitude have been updated almost every year Limitation of structural countermeasures Needs to strengthen the non-structural countermeasures

Flood Mapping Past Flood Inundated Area Map Flood-prone Area Map Flood Hazard Map Flood Inundation Area Map(FIAP) Flood Hazard Map computer system Flood-Prone Area Map(FPAM) Local data

Production of Flood Inundated Area Map Investigation of inundated area for every big flood

Production of Flood Inundated Area Map Inundated Area Map of Anseong City in August 2000

Production of Flood-prone Area Map(Flood Risk Map) Projects for 7 vulnerable reaches in Han river basin from 2000 to 2002 were performed Nakdong River basin project was started in 2003

Flood Hazard Map / Management System Background of system development Hard to keep paper maps Hard to provide to practical user Installed in 36 the local governments Computer System Configuration Hardware Software PC(above RAM 64MB) Storage Capacity needs 20MB Color printer(Map print) GIS package : GEOMania Operation system : window

Flood Hazard Map / Management System System function Section Contents GIS Tool GEOMania Base map (digital) Topographic map (1:5,000 and 1:2,500) function Input and retrieval of flood information - Climatical and hydrological data - Yearly inundated area Search of information - search of continuously inundated area - Photograph of damage site - Inundation depth sign board - Public building Disaster statistics Flood hazard map design

Flood Hazard Map / Management System

Flood Hazard Map / Management System

Flood Hazard Map / Management System

Flood Hazard Map / Management System

Flood Hazard Map / Management System Public building Gauging station Pumping station Inundation depth sign board Bank breaking point Vulnerable area for flooding

Work Division for Flood Mapping Design of FIAM & FPAM Total Data Management Production of FHM Disaster investigation - Flood inundation - Land slide bank breaking, etc Design of FIAM Design of FPAM - Flood simulation FIAM & FPAM Local Gov NDMS DB Design of FHM Client Input Distribution and usage of FHM Local Gov Client Central Gov. (MOGAHA, MOCT) Support of disaster investigation Production of FPAM Total management of FIAM & FPAM Improvement of NDMS function Institutional support Research Center (NIDP, KOWACO) Technical support Assistance of disaster investigation Education of gov. officer Local Gov. Disaster investigation Design and publication of FIAM Input in NDMS(DB) Management of FIAM production of FHM Public information

Conclusion How to design Flood Hazard Map more efficiently? How to distribute the Flood Hazard Map? How to design the FPAM for regions where data are poor?