1. MOE Key Laboratory of Groundwater Circulation and Environmental Evolution; China University of Geosciences; #29 Xueyuan Rd., Haidian District, Beijing 100083 China
2. Beijing Key Laboratory of Water Resources and Environmental Engineering; China University of Geosciences; #29 Xueyuan Rd., Haidian District, Beijing 100083 China
3. State Key Laboratory of Hydraulic Engineering Simulation and Safety; Tianjin University; #135 Yaguan Rd., Haihe Education Park, Tianjin 300350 China
4. Department of Civil and Architectural Engineering; University of Wyoming; Laramie WY 82071
5. Department of Civil and Environmental Engineering; University of Hawaii at Manoa; Honolulu HI 96822