1. Key Laboratory of Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, PR China
2. College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, PR China
3. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, PR China