1. School of Geography, Jiangsu Second Normal University, Nanjing 211200, China
2. Coalfield Geological Research of Jiangxi Province, Nanchang 330001, China
3. Changjiang River Scientific Research Institute, Wuhan 430010, China
4. Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
5. Nanjing Centre, China Geological Survey, Nanjing 210016, China