State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing 21008, People's Republic of China.
Environ Manage. 2010 Jan;45(1):105-12. doi: 10.1007/s00267-009-9393-6.
In late May, 2007, a drinking water crisis took place in Wuxi, Jiangsu Province, China, following a massive bloom of the toxin producing cyanobacteria Microcystis spp. in Lake Taihu, China's third largest freshwater lake. Taihu was the city's sole water supply, leaving approximately two million people without drinking water for at least a week. This cyanobacterial bloom event began two months earlier than previously documented for Microcystis blooms in Taihu. This was attributed to an unusually warm spring. The prevailing wind direction during this period caused the bloom to accumulate at the shoreline near the intake of the water plant. Water was diverted from the nearby Yangtze River in an effort to flush the lake of the bloom. However, this management action was counterproductive, because it produced a current which transported the bloom into the intake, exacerbating the drinking water contamination problem. The severity of this microcystin toxin containing bloom and the ensuing drinking water crisis were attributable to excessive nutrient enrichment; however, a multi-annual warming trend extended the bloom period and amplified its severity, and this was made worse by unanticipated negative impacts of water management. Long-term management must therefore consider both the human and climatic factors controlling these blooms and their impacts on water supply in this and other large lakes threatened by accelerating eutrophication.
2007 年 5 月下旬，在中国第三大淡水湖太湖中，大量产生毒素的蓝藻微囊藻大量繁殖，导致江苏省无锡市发生饮用水危机。太湖是该市唯一的供水水源，导致至少 200 万人至少一周没有饮用水。这次蓝藻水华事件比以前记录的太湖微囊藻水华提前了两个月。这归因于异常温暖的春天。这一时期盛行的风向导致水华在水厂进水口附近的岸边积聚。为了清除湖中藻类，人们从附近的长江引水。然而，这种管理措施适得其反，因为它产生的水流将藻类带入了进水口，加剧了饮用水污染问题。此次含有微囊藻毒素的水华事件及其引发的饮用水危机是由于过度的营养富集造成的；然而，多年的变暖趋势延长了水华期，并加剧了其严重性，而水管理的意外负面影响使情况更加恶化。因此，长期管理必须考虑控制这些水华及其对受加速富营养化威胁的其他大型湖泊供水的人类和气候因素。
