Funding for this research was provided by:
National Natural Science Foundation of China (41402238, 41402324)
Project of Natural Science Foundation of Guangxi (2016GXNSFBA380174, 2017GXNSFFA198006)
Project of Institute of Karst Geology, CAGS (2016001)
the Project of the China Geological Survey (DD20190022)
Article History
Received: 11 April 2019
Accepted: 29 August 2019
First Online: 9 September 2019