某地铁车辆基地生态环境影响研究

Study on Ecological Environment Impact of a Vehicle Base

以某地铁车辆基地为例,阐述项目采用低影响开发设施、含油污废水处理及回用系统对基地生态环境的影响。车辆基地采用下沉式绿地、生物滞留设施、PP模块雨水回收池后实现控制雨水量5885 m^(3),场地内年径流总量控制率77.61%,年污染物控制率达到55.77%,雨水利用率43.30%。景观雨水调蓄池调蓄雨水量18900 m^(3),减小雨水下泄流量1.99 m^(3)/s。采用隔油沉淀气浮一体化设备处理含油污水,经过滤后回用于场区绿化喷灌及道路浇洒,降低废水外排量150 m^(3)/d,每年节约新鲜水用量2.06×10^(4) m^(3)。

Taking a metro vehicle base as an example,this paper expounds the impact of low impact development facilities,oily wastewater treatment and reuse system on the ecological environment of the vehicle base.After the vehicle base adopts sinking green space,biological retention facilities and PP module rainwater storage pool,the rainwater volume can be controlled by 5885 m^(3).The total annual runoff control rate in the site can reach 77.61%,the annual pollutant control rate can reach 57.51%and the rainwater recycling rate can reach 43.30%.The landscape rainwater storage pool regulates and stores 18900 m^(3)of rain water,reducing the discharge of rainwater under 1.99 m^(3)/s.Oily sewage treatment facilities adopt integrated equipment of oil separation,precipitation and air flotation.After filtration,it can be used for greening irrigation and road sprinkling in the site,reducing the external discharge of wastewater by 150 m^(3)/d and saving 2.06×10^(4) m^(3)of fresh water consumption every year.