Funding for this research was provided by:
National key research and development program of China (2017YFC0505004)
the 135 Strategic Program of Institute of Mountain Hazards and Environment (SDS-135-1707)
Article History
Received: 3 April 2019
Accepted: 16 June 2019
First Online: 25 June 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interests.