Abstract
On August 8, 2017, Jiuzhaigou earthquake caused a large number of geological disasters in Jiuzhaigou scenic area, and many landscapes were seriously damaged. Sentinel-1A data from July 30, 2017 to January 28, 2020 are selected as the data source. SBAS-InSAR technology is used to obtain the settlement rate changes of Jiuzhaigou earthquake damaged core landscape Panda sea, Spark sea and Nuorilang waterfall, and dynamically monitor the restoration and conservation results of Jiuzhaigou. The results show that after the earthquake, the core landscape land subsidence occurs rapidly, and the settlement reaches 43 mm. The settlement of spark sea and NuoRiLang waterfall is large, and the maximum settlement is 65 mm. The three sites showed a downward trend, and the settlement rate decreased slowly and tended to be stable after repair. The effect of dynamic monitoring of Jiuzhaigou restoration and conservation is obvious, which provides a new method for landscape restoration and conservation monitoring of Jiuzhaigou scenic spots.
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