1. a Harbin Center of Natural Resources Comprehensive Survey, CGS, Harbin 150081, China
2. b Northeast Geologica S&T Innovation Center of China Geological Survey, Shenyang 110034, Liaoning, China
3. c Key Laboratory of Groundwater Resources Development and Protection in the Songnen-Sanjiang Plain of Heilongjiang Province, Harbin 150086, Heilongjiang, China