http://reply.papertrans.cn/3/255/25456/25456-31.png
http://reply.papertrans.cn/3/255/25456/25456-32.png
Submitted on: 13 September 2020.
Revised on: 01 October 2020.
Accepted on: 11 October 2020.
Progress in Physical Geography-Earth and Environment
http://reply.papertrans.cn/3/255/25456/25456-34.png
http://reply.papertrans.cn/3/255/25456/25456-35.png
http://reply.papertrans.cn/3/255/25456/25456-36.png