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Characteristics and geomorphology change detection analysis of the Jiangdingya landslide on July 12, 2018, China
Landslides ( IF 5.8 ) Pub Date : 2020-09-03 , DOI: 10.1007/s10346-020-01530-3 Shuyue Ma , Haijun Qiu , Sheng Hu , Dongdong Yang , Zijing Liu
Landslides ( IF 5.8 ) Pub Date : 2020-09-03 , DOI: 10.1007/s10346-020-01530-3 Shuyue Ma , Haijun Qiu , Sheng Hu , Dongdong Yang , Zijing Liu
The reactivation of landslides has always been a prominent problem that has endangered town construction and people’s safety worldwide. At about 8 a.m. on July 12, 2018, on a mountain near the Bailong River in Nanyu Township, Zhouqu County, Gansu Province, China, a landslide collapse event occurred. About 10,000 m 3 of sloped material slid into the Bailong River, with the largest stone reaching 3 m 3 . As a result, a large number of houses were flooded. Highways and bridges were destroyed. Using field investigations, unmanned aerial vehicle (UAV) photography, InSAR traces, historical records, and multiple remote sensing images, we extracted the landslide’s geometry and geomorphic parameters to quantify the characteristics of the Jiangdingya landslide. Based on high-resolution topographic data collected before and after the landslide, the change in the geomorphological factors, geomorphologic stability, and detection of the precursory motion before the landslide failure were analyzed to fully investigate the temporal geomorphological changes. Synthesizing the above research, we discuss the causes of landslide reactivation. The Jiangdingya landslide is a typical ancient landslide formed by the coupling of internal and external dynamics. Rainfall, seismic fault zone activity, human activities, and river erosion were the main causes of this reactivation event.
更新日期：2020-09-03
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