Peatland subsidence and vegetation cover degradation as impacts of the 2015 El niño event revealed by Sentinel-1A SAR data

Mokhamad Yusup Nur Khakim, Akhmad Aminuddin Bama, Indra Yustian, Pradanto Poerwono, Takeshi Tsuji, Toshifumi Matsuoka

研究成果: Contribution to journalArticle査読

6 被引用数 (Scopus)

抄録

Indonesia has the world's largest tropical peatland, mostly located in the southern province of Sumatra, the south of Kalimantan, and Papua. The catastrophic fires between June and October 2015 induced by the El Niño event burnt most of these peatland areas. We analyzed spatio-temporal peat subsidence during pre- and post-fires in the peat hydrological unit of Sungai Sugihan – Sungai Saleh (KHGSS), South Sumatra using Sentinel-1 images by applying DInSAR-SBAS algorithm. Based on our analysis, the linear subsidence rate after the 2015 peat fires increased by a factor 6.4 compared to that of pre-fires. Generally, the estimated subsidence is temporally well-correlated with the precipitation variation. In addition, the subsidence patterns are spatially correlated with the hotspot distribution, peat thickness, and drainage networks. Furthermore, we mapped vegetation cover over the KHGSS by using the Sentinel-1 images as well. The results show that the vegetation degradation is correlated with the hotspot distribution and the highly-degraded vegetation associated with the 2015 peat fires. It demonstrated that the 2015 El Niño event has significant impacts on increasing the amount of the subsidence and the vegetation degradation in KHGSS area.

本文言語英語
論文番号101953
ジャーナルInternational Journal of Applied Earth Observation and Geoinformation
84
DOI
出版ステータス出版済み - 2 2020

All Science Journal Classification (ASJC) codes

  • 地球変動および惑星変動
  • 地表過程
  • 地球科学におけるコンピュータ
  • 管理、モニタリング、政策と法律

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