SARデータを地盤液状化現像の分析に適用した場合の効果について

抄録

This paper discussed the effectiveness in case of applying synthetic aperture radar (SAR) data to the liquefaction potential assessment. In this study, the liquefaction potential assessment with SAR data and Geographical Information were carried out by using LF (Latency Factor) Model developed by ourselves in 1991. Two examination cases executed to make the liquefaction potential maps are as follows: CASE-A) Only using Geographical Information (GI).
CASE-B) Using SAR data and GI.
The summaries of this study are as follows:
1) The causality between topographical information and the backscattering coefficient was suggested by the analysis based on the quantification method type II and III. It was confirmed that the SAR data was very useful for extracting areas in danger of liquefaction through the discriminated results by using LF model.
2) In case of using SAR data and GI (CASE-B), analysis of the last conditions on the test field, such as soil moisture, topography and land cover, could be performed with the liquefaction potential map.
3) Furthermore, by extracting pixels of different results between CASE-A and CASE-B, a subtracted image was proposed for the practical use of the SAR data. This subtracted image was very useful for supporting the judgement whether dangerous or not for liquefaction.