1. a Institute of Municipal Engineering, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
2. b Guangzhou Water Investment Group Co., Ltd, Guangzhou 510655, China
3. c Guangzhou Water Supply Co., Ltd, Guangzhou 510600, China
4. d Zhejiang Key Laboratory of Drinking Water Safety and Distribution Technology, Zhejiang University, Hangzhou 310058, China