武汉市楚河生态河道水质保持设计

Water Quality Conservation Design of Ecological Chuhe River in Wuhan

楚河是武汉市一条连接东湖和沙湖的人造生态河道,同时也是汉街的重要景观。以楚河生态河道设计为例,从河道形态设计及景观工程设计两方面,详细介绍了其设计特点。河道形态设计时,采用河道平面蜿蜒性设计、深潭-浅滩序列设计、多种横断面形式相结合设计以及节制闸设计等方法保证楚河的水位与水质;在景观工程设计中融入点源和面源污染控制理念,使生态工程与景观工程有效结合,截留污染保证楚河水质。对楚河三个断面进行了为期一年的水质监测,结果表明:楚河水质全年75%时间能优于《地表水环境质量标准》(GB 3838—2002)的Ⅳ类标准,河流水生态环境维持良好。

Chuhe River is a constructed ecological river to connect Donghu Lake and Shahu Lake in Wuhan,which is an important landscape in Han Street.Taking the design of the ecological river course of Chu River as an example,the typical design characteristics were elucidated in detail from the aspects of river course shape design to landscape engineering design.The design of river plane curvature,deep pool-shoal sequence design,combination design of various river cross sections forms and control gates were used to ensure the water level and water quality.Furthermore,the point source pollution and non-point source pollution was integrated into landscape engineering design to effectively combine ecological engineering and landscape engineering,and to stop pollution to ensure the water quality of the Chuhe River.With monitoring of water quality at three sections of Chuhe River in whole one year,the results showed that the water quality of the Chuhe River could meet the levelⅣin Environmental Quality Standards for Surface Water(GB 3838-2002)in more than 75%time among the whole year,which indicated that water ecological environment in this river was conserved well.