NCKRI Symposium 2: Proceedings of the Thirteenth Multidisciplinary Conference on Sinkholes and the Engineering and Environmental Impacts of Karst
Download Full Text (786 KB)
In the past decade, sinkhole collapses occurred every year at Qingyun village, Guigang, Guangxi, China. Groundwater fluctuations were thought to cause these collapses. A high resolution real-time monitoring system was established to assess sinkhole hazards in this area. Monitoring of water levels of residential and community wells indicate a water shortage in the shallow karst aquifer, which is greatly influenced by precipitation in the study area. Domestic and irrigation water usage could result in frequent and dramatic changes of water level in the shallow karst aquifer. By comparing with real-time monitoring of the groundwater level in a referenced area with no sinkhole collapsing event, a characterization process was developed to assess sinkhole hazards in the Qingyun village area. Characterization criteria include daily water level fluctuations of karst aquifer, recovery of water level in the karst aquifer, maximum declining rate of water level in the karst aquifer, and sinkhole distribution within 500 m of water pumping activity. The characterization process was then applied to the study area to identify and prioritize areas that are most likely to be affected by human activities. This characterization process could be used by engineers and land-use planners to prioritize water usage and to prevent the development of soil voids and human-induced sinkholes in active karst areas. -- Authors Open Access - Permission by Publisher See Extended description for more information.
University of South Florida
Jiang, Xiaozhen; Lei, Mingtang; and Gao, Ming, "Characterization of karst collapse hazard based on groundwater fluctuations in Qingyun Village, Guigang, Guangxi, China NCKRI Symposium 2: Proceedings of the Thirteenth Multidisciplinary Conference on Sinkholes and the Engineering and Environmental Impacts of Karst" (2013). KIP Talks and Conferences. 32.