Identification of potential landslide hazards in the Ankang area using L-band differential interferometric SAR satellite

doi:10.6046/zrzyyg.2023152

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Abstract

On April 1, 2023, China’s first satellite constellation-L-band differential interferometric Synthetic Aperture Radar (L-SAR)-began to test the distribution of interferometric SAR data for natural resource applications. To evaluate the coherence and effectiveness of deformation monitoring using the L-SAR satellite for areas with high vegetation coverage, complex terrain, and long-term baseline, this study conducted potential landslide hazard identification in the Ankang area in the eastern Qinba Mountain. The deformation information of the study area was extracted using L-SAR data. Using such information, combined with high-resolution optical images for comprehensive remote sensing identification, this study identified seven potential landslide hazards in the study area through interpretation. Field investigation confirmed that the observed deformation signs in potential landslide hazard areas were consistent with the InSAR monitoring results. The study indicates that the L-SAR satellite enjoys a high interference imaging ability, high imaging quality, and effective deformation monitoring, meeting the demand for deformation monitoring in areas with high vegetation coverage. For mountainous areas with high vegetation coverage, the use of L-band SAR data through DInSAR technology, combined with comprehensive remote sensing identification using high-resolution optical imagery, allows for the effective identification of potential landslide hazards.

Keywords L-SAR landslide potential geological hazard InSAR

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TP79

Issue Date: 23 December 2024

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	Jing HAN
	Shuai YANG
	Tao YANG
	Nannan ZHU
	Yudong MA
	Wenlong ZHANG

Cite this article:

Jing HAN,Shuai YANG,Tao YANG, et al. Identification of potential landslide hazards in the Ankang area using L-band differential interferometric SAR satellite[J]. Remote Sensing for Natural Resources, 2024, 36(4): 254-259.

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https://www.gtzyyg.com/EN/10.6046/zrzyyg.2023152 OR https://www.gtzyyg.com/EN/Y2024/V36/I4/254

Fig.1 Topography of the study area and the data range of L-SAR 01A and 01B

Tab.1 Main parameters of L-SAR satellite

Fig.2 Coherence coefficient diagram and differential interferogram before and after filtering

Fig.3 Identification results of surface deformation and potential landslide hazard in the study area

Fig.4 Comparison of InSAR and optical images of typical landslide hazards

Fig.5 Field investigation photos of landslide hazards in Anpo village

Fig.6 Field investigation photos of landslide hazards in Jinmata village

Fig.7 Field investigation photos of landslide hazards in Zaoyuan village

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