Funding for this research was provided by:
Shaanxi Nature Science Basic Research Program (2019JM-429, 2019JQ-382)
National Natural Science Foundation of China (21906039, 21906072)
Funding project for introduced overseas scholars of Hebei Province (C20190321)
Program for water resources research and promotion of Hebei Province (2019-55)
Doctoral research fund of Hebei Geo University (BQ2019041)
Article History
Received: 7 January 2021
Accepted: 8 April 2021
First Online: 23 April 2021
Declarations
:
: The authors declare that they have no conflict of interest.