1. Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, School of Hydraulic Engineering, Changsha University of Science and Technology, Changsha 410004, China
2. Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
3. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 10084, China