AN APPLICATION OF SATELLITE THERMAL INFRARED DATA IN TRIGGER-FACTOR INVERSE ESTIMATION FOR IDENTIFYING HAZARDOUS-SLOPE COMPOSED OF SHIRASU-DEPOSIT

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  • シラス自然斜面の崩壊誘因推定支援を目的とした衛星熱赤外域情報の活用方法の提案
  • シラス シゼン シャメン ノ ホウカイ ユウイン スイテイ シエン オ モクテキ ト シタ エイセイ ネツ セキガイイキ ジョウホウ ノ カツヨウ ホウホウ ノ テイアン

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Abstract

This paper discusses the applicability of the satellite Thermal-Infrared data (TI data) for the inverse estimation of trigger factors with respect to the shirasu slope failures, based on the analysis of covariance structures model. In this model, a “Trigger Factor Influence map (TFI map)” could be produced through the measurement-equation defined by the trigger- and the causal-factor, such as the geographical information (GI) as well as the satellite data. In producing the TFI maps, the following examination cases were executed: Case-1) Only using GI, Case-2) Using the TI data and GI. In the Case 2 of applying the TI data, the better goodness fit of the model is confirmed through the hypothesis testing. Furthermore, as a practical utilization of the TI data, the “Risky- and Safe-side assessment” sub-area is delineated on the difference map between the TFI maps in each case.

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