1. Key Laboratory of Karst Dynamics, MNR/GZAR, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin, China
2. International Research Centre on Karst under the Auspices of UNESCO, National Center for International Research on Karst Dynamic System and Global Change, Guilin, China
3. School of Civil Engineering and Architecture, Guangxi University, Nanning, China
4. Center for Human GeoEnvironmental Studies, Department of Earth, Environmental, and Atmospheric Studies, Western Kentucky University, Bowling Green, Kentucky, USA