去富营养化技术在城市景观水治理中的应用——以“奉贤区南桥新城水系整治二期水系”水质净化项目为例

Application of Prevention and Control of Aquatic Eutrophication in the Treatment Urban Landscape Water——To the Second Phase of Lake in Shanghai Nanqiao as An Example

该文以"奉贤区南桥新城水系整治二期水系"水质净化项目为例,水域面积约30万m^2,其中鱼身区水域面积约24万m^2,鱼头区水域约5万m^2,石家中心河为7 053 m^2,利用"水生去富营养技术"进行水体生态修复,并对水质净化效果进行分析。人工湖的水质监测数据表明,其主要水质指标((不包括石家中心河)TP、TN、COD_(Mn)、BOD_5、DO)完成施工6个月内达到国家地表水环境质量标准GB 3838—2002Ⅲ~Ⅳ类及以上标准;完成施工1年后水体主要水质指标(不包括石家中心河)TP、TN、COD_(Mn)、BOD_5、DO)达国家地表水环境质量标准GB 3838—2002Ⅲ类及以上标准,水体透明度达到1.5 m以上,并能抵抗一定外源污染。本工程实施为城市人工湖水体生态修复及长效保持提供了借鉴意义。

Taking the second phase of lake in Shanghai Nanqiao as an example, which has 300 000 m2 water area, the body＇s is about 240 000 m2, the top of the water is around 50 000 m2, Shijia Zhongxin River is 7 053 m2, prevention and control of aquatic eu- trophication technology was used to restore water ecology, and the effect of water quality purification was also analyzed. Artificial lake water quality monitoring data shows that the main water quality indicators （TP, TN, CODm, BODs, DO）are maintained at standard GB 3838--2002 Ⅲ-Ⅳ level since completion of construction period of 6 months, and standard GB 3838--2002Ⅲlevel at the com- pletion of the construction within one year. The transparency of water is more than 150 cm, and can resist external pollution. This project provides a certain practical reference in ecological restoration and long-term stabilization for the repairing of the city lake.