| Three satellite-based topography data (ALOS PRISM, ASTER and SRTM) were compared with laser profiler data to check their accuracy and inundation simulation was conducted by using those satellite-based topography data. The experimental area was Nakanoshima area in Kariyata River Basin in which there was the big flood disaster in 2004. As a result of the comparison with the laser profiler data, ALOS PRISM and SRTM showed similar error characteristics in the experimental area and ASTER showed inferior to them. However, ALOS PRISM showed gurge shape which SRTM does not have in that area. Result of inundation simulation showed that none of them could simulate the actual inundation process but SRTM showed better result than ALOS PRISM and ASTER. |
