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Vertical and horizontal displacements of a reservoir slope due to slope aging effect,rainfall,and reservoir water

查看全文 作　　者：Dongzhen [1]Jia;Ye [2]Zhou;Xiufeng [1]He;Nan [3]Xu;Zhixiang [4]Yang;Minfeng [1]Song 高影响力作者 机构地区：[1]School of Earth Sciences and Engineering,Hohai University,Nanjing 211100,China;[2]North Information Control Research Academy Group Co.,Ltd,Nanjing 211100,China;[3]College of Marine Science and Engineering,Nanjing Normal University,Nanjing 210023,China;[4]China Railway Water Conservancy&Hydropower Planning and Designing Group Co.,Ltd,Nanchang 330029,China高影响力机构 出　　处：《Geodesy and Geodynamics》索引2021年第12卷第4期,共13页高影响力期刊 基　　金：funded by the National Natural Science Foundation of China[grant numbers 41474001,41830110];the Fundamental Research Funds for Central Universities[grant number 2018B58214];the Surveying and Mapping Basic Research Program of National Administration of Surveying,Mapping and Geoinformation[grant number 13-01-05];the Major Scientific and Technological Projects of Jiangxi Water Resources Department[grant number kt201322];the Natural Science Foundation of Jiangsu Province,China[grant number BK20170869]。 摘　　要：Landslides are common hazards in reservoir areas and significantly affect dam operation and human lives.For the prevention and management of landslides,accurate assessment of the factors influencing their generation is essential.This study evaluated the key external factors influencing horizontal and vertical displacements of Luobogang Reservoir Slope in Hanyuan County,China.Displacements had been monitored by a surface-displacement-monitoring system consisting of 118 GPS stations during 2012-2015.To identify the external driving factors,their influence zones,and slope responses,we analyzed 32 months of displacement measurements and other multi-source datasets using the empirical orthogonal function.Overall,the results show that slope aging effect,rainfall,and reservoir water levels are three main driving factors.For horizontal displacement,aging effect is the most critical factor and predominantly affects the edges of landslides,the gob cave,and the public building zones.The secondary factor is the reservoir water level,which mainly acts on the boundary between the slope and reservoir water surface.The closer the slope zone is to the reservoir water,the more significant the impact is.Regarding vertical displacement,the most important factor is rainfall.The vertical displacement caused by rainfall accounts for 56.76% of the total vertical displacements.However,rainfall induces elastic displacements that generally cause less damage to the slope.The secondary factor is aging effect,and the vertical displacement caused by aging effect accounts for 9.42%.However,seven individual zones are highly affected by slope aging effect,which is consistent with the distribution of public buildings. 关 键 词：Reservoir slope Horizontal and vertical displacements Influencing factors Aging effect Reservoir water level
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