1. College of Territorial Resources and Tourism; Anhui Normal University; Wuhu China
2. Anhui Province and Huai River Institute of Hydraulic Research; Anhui China
3. Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education; Beijing Normal University; Beijing China
4. Faculty of Geographical Science and Academy of Disaster Reduction and Emergency Management; Beijing Normal University; Beijing China
5. Department of Biological and Agricultural Engineering and Zachry Department of Civil Engineering; Texas A&M University; College Station TX USA