1. a School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China
2. b China Geological Environmental Monitoring Institute, Beijing 100081, China
3. c Henan Key Laboratory of Groundwater Pollution Prevention and Rehabilitation, Zhengzhou 450001, China
4. d No. 1 Institute of Geo-Environment Survey of Henan, Zhengzhou, China
5. e Henan Institute of Geology Survey, Zhengzhou, China
6. f Henan Baoyuan Exploration Technology Co., Ltd, Zhengzhou, China