1. Key Laboratory of Water Cycle and Related Land Surface Processes; Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences; Beijing 100101 China
2. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering; Hohai University; Nanjing 210098 China
3. University of Chinese Academy of Sciences; Beijing China
4. Key Laboratory of Environmental Evolvement and Ecological Construction of Hebei Province, College of Resources and Environmental Sciences; Hebei Normal University; Shijiazhuang 050024 China