Funding for this research was provided by:
National Natural Science Foundation of China (51679158)
National Program on Key Basic Research Project of China (2015CB057903)
Opening fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (SKLGP2016K018)
Article History
Received: 27 July 2017
Accepted: 29 December 2017
First Online: 3 April 2018