Study on the safe operation of karst collapse prevention in Datengxia reservoir
JIANG Fuwei
Abstract：Reservoir operation is easily to induce landslide,karst collapse and other geohazards in the reser-voir area.The safe operation of a reservoir can effectively reduce the occurrence of geological disasters.Tak-ing the Datengxia reservoir under construction as an example,this paper presents the prevention to karst col-lapse through reservoir safe operation.According to the field investigation,the mechanism model of karst collapse development is established,based on the analyses of geological information and developing situation of the karst collapse in the study area.In order to analyze the effect of groundwater dynamic due to reservoir operation on the karst collapse,the Modflow software is used to conduct the numerical simulation.Through the numerical simulation,both of the change of groundwater level caused by the fluctuation of reservoir wa-ter level and the change of groundwater velocity induced by the impoundment or drainage of Datengxia reser-voir are predicted.As the results,safety water level of the Datengxia reservoir is 51-62 m to prevent karst collapse in Wuxuan protection region,the safe impoundment speed of water level is 0-1.0 m·d-1,and the safe drainage speed of water level is 0-3.0 m·d-1.
Keywords：Datengxia reservoirkarst collapsereservoir safe operationsafe water levelsafe impound-ment speedsafe drainage speed
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 851-858 )