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Landslides induced by typhoon rainstorm has the characteristics of abruptness and difficulty in the investigation. Taking the Shanzao landslide that occurred during the typhoon "Lekima" as an example, based on 24 landscape data of Railway Sentinel-1 from Sept. 12, 2017, to Aug. 9, 2019, this paper analyzed the sequential cumulative deformation of landslides in this period by SBAS-InSAR technology and further analyzed the regularity of surface deformation of landslide mass with meteorological data. The results show that the deformation before the occurrence of Shanzao landslide is mainly divided into three stages: creep stage of landslide mass, deformation of front edge of landslide mass increases significantly and gradually expands toward the middle of the slope mass, and accelerated deformation stage of the rear edge of landslide mass. The vertical deformation rate and accumulated deformation data of InSAR monitoring points on the landslide mass show that the deformation rate and accumulated deformation in the front and middle of slope are small, and it mainly focus on the rear edge of the landslide, with the maximum deformation rate and accumulated settlement of 40 mm/a and 320 mm respectively. The landslide is a push-over landslide. The research results provide a new idea and method for the early identification, monitoring and early warning of landslides, and have a certain reference value for the prevention and control of landslide disasters.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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