D2のQoriさんの論文がNature Scientific Reportsに採択されました。
Qoriatu Zahro, ○Yuta Izumi, Dandy Aditya Novresiandi, Destika Cahyana, Joko Widodo, Daichi Ito, Kaoru Ota, and Mianxiong Dong, “Tropical peatland restoration evaluation using time-series L-band InSAR analysis,” in Nature Scientific Reports, number: 23749, June 2025.
Abstract
Since 2016, tropical peatland restoration efforts in Kalimantan, Indonesia, have focused on rewetting through canal blocks installation—engineering barriers constructed across drainage canals. This structure is intended to raise the ground water table and re-saturate the peat, thereby reducing its flammability and preventing further degradation. Nonetheless, recurring fires triggered by climatic variability continue to raise a critical question, is canal block effective in controlling tropical peatland degradation? This study evaluates the impact of canal blocks by analyzing peatland displacement. We apply L-band Interferometric Synthetic Aperture Radar (InSAR), which provides wide-area, high-resolution measurements of surface movement derived from phase difference analysis of the SAR return signal, complementing spatially limited ground-based methods. A velocity map was generated to illustrate displacement distribution over time. Comparative analyses between pre- and post-restoration periods reveal a clear reduction in subsidence following canal block implementation. Histogram assessments of displacement further support a consistent subsidence decline. Notably, we observed greater stabilization during the stable phase of restoration, suggesting that time is a critical factor in achieving restoration outcomes. Overall, our findings demonstrate that canal blocks can effectively reduce peatland degradation when given sufficient time to take effect, reinforcing their role as a key strategy in tropical peatland recovery.