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Volume 31 Issue 6
Dec 2020
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Jian Guo, Mo Xu, Qiang Zhang, Xianxuan Xiao, Shishu Zhang, Shaoming He. Reservoir Regulation for Control of an Ancient Landslide Reactivated by Water Level Fluctuations in Heishui River, China. Journal of Earth Science, 2020, 31(6): 1058-1067. doi: 10.1007/s12583-020-1341-7
Citation: Jian Guo, Mo Xu, Qiang Zhang, Xianxuan Xiao, Shishu Zhang, Shaoming He. Reservoir Regulation for Control of an Ancient Landslide Reactivated by Water Level Fluctuations in Heishui River, China. Journal of Earth Science, 2020, 31(6): 1058-1067. doi: 10.1007/s12583-020-1341-7

Reservoir Regulation for Control of an Ancient Landslide Reactivated by Water Level Fluctuations in Heishui River, China

doi: 10.1007/s12583-020-1341-7
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  • Corresponding author: Mo Xu, xm@cdut.edu.cn
  • Received Date: 01 Dec 2019
  • Accepted Date: 26 Apr 2020
  • Publish Date: 18 Dec 2020
  • Due to the complex geological processes of Qinghai-Tibet Plateau,numerous deposits,especially the large-scale ancient landslide deposits,are characteristic features of the valleys incised in southwestern China. Intense water level fluctuations since 2011 in Maoergai Reservoir,China,registered the reactivation of Xierguazi ancient landslide,and presented a significant risk to neighboring facilities. Based on detailed field survey and drilling exploration,the landslide was divided into Zone A and Zone B,and other characterizations of landslide were studied as well. To precisely measure the extent of landslide displacement during filling and drawdown stage,surface displacement monitoring system was deployed on the landslide. The monitoring analyses data reveal that reservoir fluctuation is the dominant factor influencing landslide displacement,especially during drawdown stage. Moreover,a future sliding is anticipated in Zone A,while a creep had already existed in Zone B. A reservoir regulation was then established using the lead-lag correlation between reservoir fluctuation and landslide displacement and landslide stability analysis. In the end,the follow-up deformation monitoring demonstrates that the reservoir regulation controlled the landslide effectively. Landslide control by reservoir regulation in Maoergai can serve as a case study for other settlements involved in similar construction activities.

     

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