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

2. 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

3. 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

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

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

6. 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

7. 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

8. 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

9. Flood Hazard Map / Management System

10. Flood Hazard Map / Management System

11. Flood Hazard Map / Management System

12. Flood Hazard Map / Management System

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

14. 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

15. 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?