1. College of Urban and Environmental Sciences Peking University Beijing China
2. Department of Earth and Environmental Sciences Syracuse University Syracuse NY USA
3. China Jikan Research Institute of Engineering Investigations and Design, Co., Ltd. Xi'an China
4. Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China
5. Department of Hydraulic Engineering Tsinghua University Beijing China
6. Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu China