Hydraulic Engineering Commons^™

Study On The Critical Velocity Of Groundwater To Form Subsidence Sinkholes In Karst Area, Fuwei Jiang

Sinkhole Conference 2015

Subsidence sinkholes in karst area are a common geological hazard causing disaster accidents. However, the critical hydraulic conditions of forming subsidence sinkholes have not been well understood. Based on the theories of pipe flow, this paper derives expressions of a critical hydraulic condition for assessing whether it leads to subsidence sinkholes. A case study with samples of the cohesive soils taken from the Wuxuan county, Guangxi province, China, was conducted to evaluate the derived critical value. Combining the derived critical value and the monitoring data of hydraulic conditions in the study field, our results indicate that subsidence sinkholes are not …