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Outline
Taking the Yingpan landslide in the Lancang river basin as the study object, this study employed the SBAS-InSAR technique to process 82 scenes of Sentinel-1 descending orbit images acquired from January 2021 to December 2023 for deformation calculation. The spatiotemporal evolution characteristics of its overall deformation were analyzed. Subsequently, the local deformation features along the road and elevation profiles were thoroughly examined, and the response relationship between time-series deformation and rainfall was investigated. Finally, the fast independent component analysis (FastICA) method was applied to decompose the deformation displacement, revealing the spatial distribution differences and temporal variation characteristics of different deformation components of the Yingpan landslide. The results indicate that during the monitoring period, the maximum deformation rate along the line of sight (LOS) direction reached -65 mm/a, with a maximum cumulative deformation of -175 mm. The deformation area extended over 1 000 m in both east-west and north-south directions, and the deformation characteristics varied across different land cover types. A significant correlation was observed between the magnitude of deformation and rainfall, with deformation being markedly greater during the rainy season than the dry season. FastICA analysis revealed that the overall deformation of the landslide exhibits periodicity.
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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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