Assessment of Burnt Forest Area in Thailand using Remote Sensing and GIS

1
Assessment of Burnt Forest Area in Thailand
using Remote Sensing and GIS

• Dr. Suwit Ongsomwang
• Center of Information and Communication
  Technology
• Office of the Pamanent Secretary
• Ministry of Natural Resources and Environment
• Bangkok 10400,Thailand
• e-Mail s_ongsomwang_at_monre.go.th

2
Outline

• Role of remote sensing and GIS
• Methodology
• Analysis forest burnt area
• Administrative Boundary
• Forest Function
• Forest Land Use
• Conclusion

3
Assessment of Burnt Forest Area in
19992000Methodology

• To acquire satellite data and to collect present
  burnt forest area reports
• To conduct image processing
• To produce satellite images
• To interpret burnt forest area
• To establish GIS database
• To assess burnt forest area and prepare a report

4
THAILANDLandsat-TM Mosaic
5
Assessment of Burnt Forest Area in
19992000Image Production
6
Assessment of Burnt Forest Area in
19992000Image Interpretation

• Object Recognition Keys
• Shape
• Pattern
• Color
• Site
• Association

Band Combination 7, 4 and 2
7
Assessment of Burnt Forest Area in 19992000 GIS
Database
National Parks
Wildlife Sanctuaries
8
Assessment of Burnt Forest Area in
1999-2002Burnt Forest Area
1999 2,935 sq. km 2000 933 sq. km 2001 761
sq. km 2002 1,394 sq. km
9
Burnt Forest Area 1999-2002
Region/Country 1999 2000 2001 2002
Region/Country Sq. km Sq. km Sq. km Sq. km
North 2,404.68 783.81 632.02 1,055.49
Northeast 193.08 117.87 122.26 230.88
Central 312.15 15.13 6.68 56.70
East 18.63 16.43 0.18 46.93
South 6.07 0.00 0.76 3.90
Country 2,934.61 933.24 761.89 1,393.89
10
Forest Fire Risk Map in 19992000Regional Forest
Offices
1999
2000

• In 1999, forest fires were mostly taken place at
  Nakorn Sawan Regional Forest Office.
• In 2000, forest fires were mostly taken place at
  Chiang Mai Regional Forest Office.

11
Forest Fire Risk Map in 19992000Provincial
Forest Offices
1999
2000

• In 1999, forest fires were mostly taken place at
  Nakorn Sawan Provincial Forest Office.
• In 2000, forest fires were mostly taken place at
  Mae Hong Sorn Provincial Forest Office.

12
Assessment of Burnt Forest Area in
19992000National Parks and Wildlife Sanctuaries

• In 1999, forests of 65 national parks were burnt
  with an area of 922 sq. km. While in 2000, forest
  of 67 national parks were burnt about 124 sq. km.
• For 44 wildlife sanctuary, in 1999 and 2000
  forests were burnt about 576 and 8 sq. km.

13
Forest Fire Risk Map in 1999200025 Watershed
Areas
1999
2000

• In 1999 and 2000, forest fire were mostly
  occurred in Ping Watershed with an area of 1,034
  and 301 sq. km, respectively.

14
Forest Land Use Assessment in 2000

• Based on forest land use assessment in 2000, it
  was found that the existing forest area of
  Thailand was about 172,050 sq. km or 33.40
  percent of the country.

15
Evergreen Forest Types
Tropical Evergreen Forest
Pine Forest
Dry Evergreen Forest
Swamp Forest
Hill Evergreen Forest
Mangrove Forest
16
Deciduous Forest Types
Mixed Deciduous Forest
Dry Dipterocarp Forest
Bamboo Forest
17
Assessment of Burnt Forest Area in 2000-2001In
Each Forest Types
18
Conclusion

• Remote sensing and GIS appear to be
  significant tools for assessment and monitoring
  of burnt forest area. However, the integration of
  remote sensing and GIS for developing a practical
  early warning system for forest fire management
  is more necessary and very significant.