TY - JOUR
T1 - Peatland subsidence and vegetation cover degradation as impacts of the 2015 El niño event revealed by Sentinel-1A SAR data
AU - Khakim, Mokhamad Yusup Nur
AU - Bama, Akhmad Aminuddin
AU - Yustian, Indra
AU - Poerwono, Pradanto
AU - Tsuji, Takeshi
AU - Matsuoka, Toshifumi
N1 - Funding Information:
We would like to acknowledge Sriwijaya University and the Ministry of Research, Technology and Higher Education of the Republic of Indonesia for their supports . We also thank the European Space Agency (ESA) for providing Sentinel-1 data and the SNAP software.
Funding Information:
We would like to acknowledge Sriwijaya University and the Ministry of Research, Technology and Higher Education of the Republic of Indonesia for their supports. We also thank the European Space Agency (ESA) for providing Sentinel-1 data and the SNAP software.
Publisher Copyright:
© 2019
PY - 2020/2
Y1 - 2020/2
N2 - 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.
AB - 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.
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U2 - 10.1016/j.jag.2019.101953
DO - 10.1016/j.jag.2019.101953
M3 - Article
AN - SCOPUS:85083017450
SN - 1569-8432
VL - 84
JO - International Journal of Applied Earth Observation and Geoinformation
JF - International Journal of Applied Earth Observation and Geoinformation
M1 - 101953
ER -