Jianjun Zhang¹, Hoshin Gupta², Guangyao Gao³, Bojie Fu³, Xiaoping Zhang⁴ and Rui Li⁴, (1)School of Land Science and Technology, China University of Geosciences, Beijing, China, (2)Hydrology and Atmospheric Sciences, The University of Arizona, Tucson, AZ, United States, (3)State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China, (4)State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, China