黄孝河、机场河流域合流区溢流污染控制标准探索

Exploration of Overflow Pollution Control Standards in the Combined Sewer Areas of Huangxiao River and Jichang River

黄孝河、机场河为汉口地区的重要河流,由于其流域合流制区域缺少有效的溢流污染控制措施,故雨季溢流污染严重,雨后河道水质变差。为了进一步提升黄孝河、机场河流域水环境质量,结合现有设施现状,通过InfoWorks模型,基于2个典型年的小雨、中雨、大雨和暴雨场次降雨,从水质、水量两个方向分析控制溢流量与年溢流次数的关系。研究结果表明,随着降雨的增加,溢流量逐步增多且溢流污染物平均浓度呈现先增大后减小的趋势,在年溢流10次左右对应的场次降雨下溢流量上升的斜率较为明显,可控制溢流污染总量和污染物浓度相对较优。

Huangxiao River and Jichang River are important rivers in Hankou area.However,due to inadequate overflow pollution control in the combined sewer system area,there is significant pollution during rainy seasons,further deteriorating water quality post‑rain.To enhance the water environment quality of Huangxiao River and Jichang River basins,through InfoWorks model calculation and existing facilities analysis,this study examined the impact of small,medium,large,and heavy rainfall events based on two typical annual rainfalls to understand the relationship between overflow control and annual overflow occurrences from the water quality and quantity directions.The results indicated that with the increase of rainfall,the amount of overflow increases gradually and the average concentration of overflow pollutant increases first and then decreases.The escalation in overflow is more pronounced,yet effective control manages both the total overflow volume and pollution concentration better at approximately 10 annual overflow occurrences.