为探究生态修复措施对城市湖泊水质净化的效果，于2019年6月至2021年6月对广州流花湖治理湖区（三湖）和未治理湖区（二湖）进行长期的水质监测。结果表明，通过底质改善、沉水植物群落构建和鱼类群落优化等生态修复措施，三湖水质得到显著提升，总磷含量、总氮含量、氨氮含量、化学需氧量、生化需氧量、高锰酸盐指数均显著降低，三湖水质已达到Ⅳ类水标准及以上。二湖湖区水体各项指标未出现显著降低趋势，且随时间推进显著高于三湖，长期处于Ⅴ类水标准。

In order to explore the effect of ecological restoration measures on water quality purification of urban lakes, long-term water quality monitoring was carried out in the treated lake area (the third lake) and the untreated lake area (the second lake) of Liuhua Lake in Guangzhou from June 2019 to June 2021. The results showed that the water quality of the third lake has been significantly improved through the ecological restoration measures such as the improvement of the sediment, the construction of submerged plant communities and the optimization of fish communities. The total phosphorus content, total nitrogen content, ammonia nitrogen content, chemical oxygen demand, biochemical oxygen demand and permanganate index all decreased significantly, and the water quality of the third lake in Liuhua Lake has reached the class IV water standard and above. The indicators of the water body in the second lake did not show a significant downward trend, and were significantly higher than those in the third lake with the extension of time, and remained at the class V water standard.

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