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Our Lab Made Research on Jiangdingya Landslide in Nanyu Village, Zhouqu County of Gansu Province ----2018-07-22

A large-scale landslide occurred at Jiangdingya in Nanyu Village, Zhouqu County of Gansu Province, around 8 in the morning on Jul. 12th. It caused a blocking in the river channel of Bailong River in Yuxiang Village, and the rising water level drown a lot of houses along the upper stream, while the traffic was disrupted since National Road 345 was destroyed. With the arrangement from our Executive Deputy Director, Professor Xu Qiang, our regular researches, associate researcher Li Weile, postgraduate student Shi Yuanshuai, Yang Fan, Yu Mingshan and other researchers made indoor remote sensing analysis and field studies on the landslide.


According to the UAV 3-D image measurement acquired on the field, Jiangdingya Landslide is about 700m long, 240m wide, with an area about 0.16km2 and estimated average thickness of 30m, and the volume is up to 5 million m3. It is founded from multi-temporal remote sensing image analysis that this landslide is originated from an large-scale ancient sliding mass (which is about 2000m in length and with average width of 1600m). A measurable surface deformation in a shape of round-backed armchair has occurred on this sliding mass at least before 2010, as a result of long-term eroding by the front river and influence of human activities like road excavation on the slope. A large-scale landslide was caused by the continuous heavy rain on Jul. 12th. At present, the landslide is still slowly deforming, with a danger of blocking Bailong River again. Relevant local departments are monitoring the landslide dynamically, using technologies like UAV Aerial Images, terrestrial laser scanning, and ground InSAR. Our researchers will keep on paying attention to the development of this landslide.