Angkor site monitoring and evaluation by radar remote sensing

Fulong Chen; Aihui Jiang; Natarajan Ishwaran

doi:10.1117/12.2068506

8 November 2014 Angkor site monitoring and evaluation by radar remote sensing

Fulong Chen, Aihui Jiang, Natarajan Ishwaran

Proceedings Volume 9260, Land Surface Remote Sensing II; 926018 (2014) https://doi.org/10.1117/12.2068506
Event: SPIE Asia-Pacific Remote Sensing, 2014, Beijing, China

Abstract

Angkor, in the northern province of Siem Reap, Cambodia, is one of the most important world heritage sites of Southeast Asia. Seasonal flood and ground sinking are two representative hazards in Angkor site. Synthetic Aperture Radar (SAR) remote sensing has played an important role for the Angkor site monitoring and management. In this study, 46 scenes of TerraSAR data acquired in the span of February, 2011 to December, 2013 were used for the time series analysis and hazard evaluation; that is, two-fold classification for flood area extracting and Multi-Temporal SAR Interferometry (MT-InSAR) for ground subsidence monitoring. For the flood investigation, the original Single Look Complex (SLC) TerraSAR-X data were transferred into amplitude images. Water features in dry and flood seasons were firstly extracted using a proposed mixed-threshold approach based on the backscattering; and then for the correlation analysis between water features and the precipitation in seasonally and annually. Using the MT-InSAR method, the ground subsidence was derived with values ranging from -50 to +12 mm/yr in the observation period of February, 2011 to June, 2013. It is clear that the displacement on the Angkor site was evident, implying the necessity of continuous monitoring.

Citation Download Citation

Fulong Chen, Aihui Jiang, and Natarajan Ishwaran "Angkor site monitoring and evaluation by radar remote sensing", Proc. SPIE 9260, Land Surface Remote Sensing II, 926018 (8 November 2014); https://doi.org/10.1117/12.2068506

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