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

Khakim, Mokhamad Yusup Nur (2019) Peatland subsidence and vegetation cover degradation as impacts of the 2015 El niño event revealed by Sentinel-1A SAR data. Int J Appl Earth Obs Geoinformation, 84 (10195). pp. 1-14. ISSN 1872-826X

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Abstract

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 de�monstrated that the 2015 El Niño event has significant impacts on increasing the amount of the subsidence and the vegetation degradation in KHGSS area.

Item Type:	Article
Subjects:	#3 Repository of Lecturer Academic Credit Systems (TPAK) > Articles Access for TPAK (Not Open Sources) #3 Repository of Lecturer Academic Credit Systems (TPAK) > Corresponding Author
Divisions:	08-Faculty of Mathematics and Natural Science > 45102-Physics (S2)
Depositing User:	Mokhamad Yusup Nur Khakim
Date Deposited:	19 May 2023 05:51
Last Modified:	19 May 2023 05:51
URI:	http://repository.unsri.ac.id/id/eprint/103773

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