建筑小区尺度下径流控制率与非点源污染负荷削减率协同关系研究

以陕西省西安市天福和园小区为例，基于SWMM原理构建了水质水量计算模型，借鉴国内外相似地区相关模型参数的选取并结合实测数据确定模型参数。设计了9种重现期和5种雨峰系数条件的45场降雨，以分析不同降雨条件下研究区域的径流控制率与非点源污染负荷削减率的协同关系。结果表明：相同雨峰系数降雨条件下，径流控制率与非点源污染负荷削减率呈线性关系，COD、TN、TP和TSS 4种污染物的拟合函数曲线的协同系数均大于0.989;雨峰系数对拟合函数曲线的斜率与截距影响不大；建筑小区尺度下径流控制率与非点源污染负荷削减率存在高度的线性关系，可根据径流控制率推算出污染负荷削减率。

Research on synergistic relationship between runoff control rate and non-point source pollution load reduction rate at residential community scale

Using the community of Tianfuheyuan in Xi''an City, Shaanxi Province as an example, a water quality and quantity calculation model was constructed based on the principle of the Storm Water Management Model (SWMM). The model parameters were determined based on the measurements and relevant studies in similar areas in China and abroad. To analyze the synergistic relationship between the runoff control rate and non-point source pollution load reduction rate in the study area under different rainfall conditions, 45 rainfall events with nine return periods and five rainfall peak coefficients were designed. The results show that the runoff control rate was linearly related to the pollution load reduction rate under rainfall conditions with the same rainfall peak coefficient. The coefficients of synergy of the fitted function curves for the four pollutants COD, TN, TP, and TSS were above 0.989. The rain peak coefficient had little effect on the slope and intercept of the fitted function curve. There was a highly linear relationship between the runoff control rate and non-point source pollution load reduction rate at the residential community scale, and the pollution load reduction rate can be deduced from the runoff control rate.