为分析不同调蓄池规模对初期雨水径流量及污染物的削减效果，以南昌市儒乐湖片区为例，利用SWMM模型对该地块进行水质模拟。采用实测数据对模型进行率定并验证模型精度，由结果可知该模型可信度较高，可应用于本区域降雨面源污染的控制研究。在此基础上，分别构建小重现期降雨条件下不同规模的双调蓄池联用模型，分析其对初期雨水径流的截留效果及TSS、CODcr、TP、TN等污染物浓度的削减情况。结果表明：调蓄池对径流量的截留率保持在12%至22%之间，对各污染物的削减率均达到50%以上；截流管内的流量和流速与调蓄池容积成正相关关系，总体呈增长趋势。
Abstract
In order to analyze the effects of different scale storage tanks on the initial rainwater runoff and pollutants reduction, the SWMM model was used to simulate the water quality in the area of Rule lake in Nanchang city.The measured data is used to calibrate the model and verify the accuracy of the model. The results show that the model is reliable and it can be applied to the research on the control of regional rainfall non-poin source pollution.On this basis, the combined models of different scales double-storage tank under small recurrent rainfall conditions were constructed to analyze the interception effect of initial rainwater runoff and the reduction of pollutant concentration such as TSS, CODcr, TP and TN.The results show that the interception rate of runoff by the storage tank is between 12% and 22%, and the reduction rate of each pollutant is more than 50%. The flow discharge and velocity in the interception tube are positively correlated with the volume of the storage tank, and the overall trend is increasing.
关键词
调蓄池 /
SWMM /
初期雨水 /
面源污染
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Key words
storage tank /
SWMM /
initial rainwater /
non－point source pollution
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基金
江西省研究生创新专项资金项目( YC2015－S014) ; 南昌
大学研究生创新专项资金项目( CX2018050) 。
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