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通过对合肥市杏花排水系统雨天溢流水质、水量的调查,掌握了系统雨天溢流的初期效应和颗粒物沉降性能,在此基础上分别采用初期效应分析法和平流式沉淀池评价方法估算了存储池和存储-沉淀池在6 mm调蓄径流深度下对排水系统溢流污染的控制效率。结果表明,杏花排水系统雨天溢流初期效应微弱,SS、COD的b参数年平均值分别为0.982、0.905,溢流颗粒物具有良好的沉降性能,平均沉速中值为0.191 cm/s;存储池对SS、COD的年控制率分别为52.6%、55.4%,而存储-沉淀池对SS、COD的年控制率分别为72.7%、64.4%,存储-沉淀池的控制效果更好,因此建议杏花排水系统调蓄池规划方案采用存储-沉淀池。
Through the investigation of the water overflow and storm water in Xinghuaguan drainage system in Hefei, the initial effect of the system rainy season overflow and the sedimentation performance of the particles were grasped. Based on this, the initial effect analysis method and the appraisal method of the flat-flow sedimentation basin were used respectively Control Efficiency of Drainage System Overflow Contamination with Storage and Storage - Sedimentation Tanks at 6 mm Reservoir Runoff Depth. The results showed that the initial effect of the alluvial drainage system on rainy days was weak. The annual mean b parameters of SS and COD were 0.982 and 0.905, respectively. The overflow particles had good sedimentation performance and the average median velocity of sedimentation was 0.191 cm / s. The annual control rates of SS and COD in ponds were 52.6% and 55.4%, respectively. However, the annual control rates of SS and COD in sedimentation tanks were 72.7% and 64.4%, respectively, and the control effect of storage and sedimentation tanks was better. Xinghua drainage system storage pool planning program using storage - sedimentation tank.