1. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-environmental Sciences; Chinese Academy of Sciences; Beijing 100085 PR China
2. University of Chinese Academy of Sciences; Beijing 100049 PR China
3. Soil Physics and Land Management Group; Wageningen University; Droevendaalsesteeg 4, 6708PB Wageningen The Netherlands
4. Civil, Surveying and Environmental Engineering; The University of Newcastle; Callaghan 2308 Australia
5. Department of Sediments Research; China Institute of Water Resource and Hydropower Research; Beijing 100048 PR China