The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B4. Beijing 2008 
The northern Central Plain of Thailand suffered from storm 
flood at the last period of May, 2006. The flood area is shown 
in Figure l.ALOS/PALSAR data can be observed the flood by 
the emergency data acquisition request. 
Figure 1. Storm flood area in Thailand 
The result image after morphological operations indicates at 
Figure 2. 
Figure 2. PALSAR image in Northern Central Plain ofThailand 
on May25, 2006 (left) and mathematical morphology operated 
image (right: white color) 
The flood extent is open to public by JAXA is Figure 3. 
The Figure 3. image shows only upper side of the Figure 
2. The morphological computational result in Figure 2. is 
in good agreement with the JAXA’s flood extent. 
estimated that the rice plants were slightly damaged because 
the end of May in this region is the beginning of rainy season. 
The dominant land use in this region is paddy rice fields and 
because of two or three times cultivation of rice plants, the 
major rice should be just seeded or transplanted and the flood 
inundated damage for the young rice plants will be light. Figure 
5, 6 and 7 show that this is possible. 
Figure 4. PALSAR image in Northern Central Plain ofThailand 
on May27, 2006 (left) and mathematical morphology operated 
image (right: white color) 
Figure 3. the upper stream PALSAR image of the flood 
areas (inside blue lines) reported by JAXA 
Figure 5. major rice harvested areas divided by the beginning 
planted areas in every province (FAOSTAT) 
Figure 6. Major rice production for each province in the 
Northern part of Central Plain ofThailand (by FAOSTAT ) 
Figure 4. indicates the flood situation at the two days after the 
Figure 2. image. The flood-inundated water seems to flow 
downstream during the two days. If it was the fact, it was 
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