能维持河水质量，水生生命和满足娱乐需要的河水流量。
River and stream flow that maintains stream quality, aquatic life and recreational opportunities.
文章介绍了1981 - 2001年流溪河水质量监测结果，并概要总结了流溪河水源保护的经验。
This paper introduced the monitoring result of water quality in Liuxi river during 1981 to 2001 and the experience in protecting the water resource.
结果表明，南淝河流域水环境质量总体较差，有机污染物是造成南淝河水质污染的主要原因。
The results showed that the water quality in the whole basin was not good, and organic pollutant was the main cause of the water pollution in the South Feihe River.
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