北京城市副中心典型商务办公园区雨水径流特性研究

Study on rainwater runoff characteristics of typical business office parks in Beijing sub-center

以北京园中园商务办公园区为研究区,通过布设监测采样装置,获取到6场降雨的雨量、流量和水质数据,采用综合污染指数法、相关性分析与M(V)曲线拟合等方法开展分析,结果表明:商务办公园区雨水中TN浓度超标最严重,SS和COD部分场次降雨浓度超标,而大部分降雨事件的TP和NH3-N浓度均能达标,雨水整体呈轻度污染状态;降雨总量大的场次降雨污染物相关性较好;各场次降雨初期效应不明显,初期效应均在中等以下,且多场降雨中仅有1~2项污染物表现出初期效应;雨强在一定程度上会影响水质浓度,但两者无明显相关性。研究了典型商务办公园区的雨水径流污染物特性,为指导商务办公区面源污染控制和进一步提升商务园区环境质量提供了基础。

Considering Beijing Financial Street Business Office Park as the research area, the rainfall,volume of flow, and water quality data of six rainfalls were obtained by setting up monitoring and sampling facilities. The comprehensive pollution index method, correlation analysis, and M(V) curve fitting method were used for analysis. The results showed that:(1) The rainwater was slightly polluted overall. Among the collected water quality indexes, the concentration of TN exceeded the standard significantly;the concentration of SS and COD both exceeded the standard;the concentration of TP and NH3-N reached the standard.(2) The correlations of different pollutants were better with larger rainfall.(3) The first flush of each rainfall was not evident and below the medium level, while only 1 to 2 pollutants showed first flush in several rainfall events.(4) The rainfall intensity would affect water quality concentration to a certain extent, but there is no evident correlation between the two. This study studied the pollutant characteristics of stormwater runoff in typical business office parks, which provided a theoretical basis for guiding the control of non-point source pollution in business office districts and improved the environmental quality of business parks.