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This study refers to a new method to estimate the snow depth in dam basin using Landsat TM data and digital terrain data. Analysis area (433km2, Ouyubari-dam basin) is located in mountain area in Hokkaido, Japan.The correlation analysis between snow depth and TM data was carried out. As a result of this analysis, it became clear that there was a close correlation between snow depth and band-1, 2, 3, 4 data only in the area of the mixed forest. Furthermore, the multiple regression analysis was carried out. In this analysis, the ground truth data of snow depth and S1, S2, B12 data were used. S1 and S2 values can be obtained by HSI transformation of TM data, and B12 value was calculated by ratio process using TM data. As a result of this analysis, the estimation model for measurement of snow depth using TM data was developed.The distribution map of snow dapth in dam basin (analysis area) was made by applying the estimation model developed by this study to Landsat TM data.

Estimation of Snow Depth in Dam Basin Using Landsat TM Data.