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InSAR Time Series Analysis of L-Band Data for Understanding Tropical Peatland Degradation and Restoration

1
State Key Laboratory of Geodesy and Earth’s Dynamics, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China
2
School of Geographical and Earth Sciences, University of Glasgow, Glasgow G12 8QQ, UK
3
COMET, School of Engineering, Newcastle University, Newcastle Upon Tyne NE1 7RU, UK
4
Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8567, Japan
*
Author to whom correspondence should be addressed.
Remote Sens. 2019, 11(21), 2592; https://doi.org/10.3390/rs11212592
Received: 8 September 2019 / Revised: 31 October 2019 / Accepted: 31 October 2019 / Published: 5 November 2019
(This article belongs to the Special Issue Remote Sensing of Peatlands II)
In this study, satellite radar observations are employed to reveal spatiotemporal changes in ground surface height of peatlands that have, and have not, undergone restoration in Central Kalimantan, Indonesia. Our time series analysis of 26 scenes of Advanced Land Observation Satellite-1 (ALOS-1) Phased-Array L-band Synthetic-Aperture Radar (PALSAR) images acquired between 2006 and 2010 suggests that peatland restoration was positively affected by the construction time of dams—the earlier the dam was constructed, the more significant the restoration appears. The results also suggest that the dams resulted in an increase of ground water level, which in turn stopped peat losing height. For peatland areas without restoration, the peatland continuously lost peat height by up to 7.7 cm/yr. InSAR-derived peat height changes allow the investigation of restoration effects over a wide area and can also be used to indirectly assess the relative magnitude and spatial pattern of peatland damage caused by drainage and fires. Such an assessment can provide key information for guiding future restoration activities. View Full-Text
Keywords: peatland; subsidence; restoration monitoring; InSAR; time series analysis peatland; subsidence; restoration monitoring; InSAR; time series analysis
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MDPI and ACS Style

Zhou, Z.; Li, Z.; Waldron, S.; Tanaka, A. InSAR Time Series Analysis of L-Band Data for Understanding Tropical Peatland Degradation and Restoration. Remote Sens. 2019, 11, 2592.

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