城市景观水体生态修复与水质提升工程实践——以深圳市龙潭公园景观湖为例

Practice of ecosystem restoration and water quality improvement project on urban landscape water ——Taking landscape lake of Shenzhen Longtan Park as an example

城市景观水体作为城市水体重要组成部分,是市民休闲娱乐的重要场所。以深圳市龙潭公园景观湖水体生态修复与水质提升工程为例,通过分析其污染成因、污染状况和湖水水质,确定采用预处理+底泥活化+生物调控组合技术进行处理。研究结果表明,工程施工2个月后,湖中心的溶解氧、COD、BOD 5、总磷和氨氮浓度分别为7~8、10~15、2~2.5、低于0.1和0.2~0.6 mg/L,水体透明度达1.5 m以上。全湖沉水植物每年释氧及固碳的价值为741.0万元。

Urban lakes,which are important parts of urban water,are important places offering leisure and entertainment services to the public.Taking landscape lake of Shenzhen Longtan Park as an example,the combined technology of pretreatment+sediment activation+biological control was used to treat the landscape lake by analyzing the causes of pollution,pollution status and lake water quality.The results showed that two months after the construction of the project,the dissolved oxygen concentration,COD concentration,BOD 5 concentrationin,total phosphorus concentration,ammonia nitrogen,the transparency of the center landscape water was 7~8,10~15,2~2.5,less than 0.1,0.2~0.6 mg/L and above 1.5 m,respectively.The annual oxygen release and carbon fixation value of submerged plants in the lake was 7.41 million yuan.