Qiao Yinhuan, Feng Jianfeng, Liu Xia, Wang Wei, Zhang Pei, Zhu Lin
Key Laboratory of Pollution Process and Environmental Criteria of Ministry of Education and Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China.
Bureau of Hydrology and Water Resources of Henan Province, Zhenzhou, 450003, China.
Environ Monit Assess. 2016 Jul;188(7):443. doi: 10.1007/s10661-016-5454-5. Epub 2016 Jun 29.
With economic development and the increase of energy consumption, surface water acidification has been a potential environmental concern in China. Here, we analyzed variations and trends in surface water pH of 73 sites from ten river basins in China from 2004 to 2014 with nonparametric Seasonal Kendall test method. Our analysis showed that the variations of surface water pH in China ranged from 6.5 to 9.0 in the past decade (2004-2014), which satisfied the water quality criteria in pH for protection of aquatic ecosystems in China (6.0-9.0) and USA (6.5-9.0). However, significant decreasing trends in surface water pH were found in 31 monitoring sites, which were mainly located in Haihe River, Taihu Lake and Yangtze River, while the pH value showed significant increasing trends in 22 sites, which mainly were located in Songhua River and Pearl River. Our results suggested the increased potential acidification of susceptible water bodies in China. Besides the control policy of sulfur dioxide (SO2) emissions, the emissions of nitrous oxides (NOx) should also be reduced to protect the aquatic systems in China.
随着经济发展和能源消耗的增加，地表水酸化已成为中国一个潜在的环境问题。在此，我们采用非参数季节性肯德尔检验方法，分析了2004年至2014年中国十个流域73个站点地表水pH值的变化及趋势。我们的分析表明，在过去十年（2004 - 2014年），中国地表水pH值变化范围为6.5至9.0，满足中国（6.0 - 9.0）和美国（6.5 - 9.0）保护水生生态系统的水质pH标准。然而，在31个监测站点发现地表水pH值呈显著下降趋势，这些站点主要位于海河、太湖和长江，而在22个站点pH值呈显著上升趋势，这些站点主要位于松花江和珠江。我们的结果表明中国易受影响水体的潜在酸化加剧。除了控制二氧化硫（SO₂）排放政策外，还应减少氮氧化物（NOₓ）排放以保护中国的水生系统。
