Funding for this research was provided by:
Ministry of Science and Technology of the People's Republic of China (2016YFC0502501)
Natural Science Foundation of Guangxi Province (2017GXNSFFA198006)
Special Fund for Basic Scientific Research of Institute of Karst Geology, CAGS (2020004)
Article History
Received: 18 June 2020
Accepted: 16 November 2020
First Online: 7 January 2021
Compliance with ethical standards
:
: The authors declare no conflict of interest.