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长江水质污染概况 长江是我国第一大河,船舶通航6500公里,水源非常丰富,年平均流量约三万米~3/秒,具有强大的稀释能力。但由于石油化工和交通运输事业的迅速发展,长江普遍受到污染,每天接纳污水二千六百万吨,每年排入油类三万余吨。南京段污染更为严重,油的检出率为100％,南京港上游超标、下游超标。使水厂、渔业生产受到影响,在30多公里的江岸找不到合乎卫生标准的饮用水源。
Yangtze River Water Pollution Overview The Yangtze River is the largest river in China with 6,500 kilometers of navigation and abundant water resources. The annual average flow rate is about 30,000 to 3 per second, with a strong dilution capacity. However, due to the rapid development of the petrochemical and transportation industries, the Yangtze River is generally polluted and receives 26 million tons of sewage every day and 30,000 tons of oil are discharged each year. Nanjing section of the more serious pollution, oil detection rate was 100%, Nanjing Port upstream exceeded, downstream exceeded. Water plants and fishery production are affected. Drinking water sources that meet health standards can not be found on more than 30 kilometers of river bank.