時系列LANDSATデータによる足尾荒廃山地における植生回復モニタリング

抄録

The Ashio region has been devastated by past disasters. This study monitored the vegetation recovery in the Ashio area using LANDSAT time series data. We used the pre-processed LANDSAT time series data for classification by SVM and time series analysis by vegetation index and bare soil index. The SVM classification results showed that vegetation had recovered significantly in the Ashio area over a period of 36 years. The MSAVI2 was suitable for monitoring the vegetation recovery in this area. As a result of the time series analysis, we identified areas where vegetation recovery was particularly significant. Also, some areas with slope failure were identified. It was found that the vegetation recovery work carried out so far was effective. There are 27.5% of the sites where vegetation has not recovered, and monitoring needs to be continued.