水质在线监测缺失下初雨调蓄池的控制策略研究OA
Control strategy for initial rainwater storage tanks in absence of online water quality monitoring
初雨调蓄池是拦截降雨初期高污染负荷径流、减少城市水环境污染的重要设施.然而,受成本、维护条件及技术条件等多因素限制,通常难以获取在线水质监测数据指导初雨调蓄池的实时调度运行.当前基于初雨总量控制的方法难以响应雨水污染物的时序变化,导致"蓄清排污"或"资源浪费",难以充分发挥调蓄池效能.为此,提出一种基于累积污染负荷比的控制策略,通过典型初雨事件的实测与模拟数据分析初期雨水的冲刷效应,识别达到污染负荷控制目标的关键收水时段,进而优化调蓄池及溢流排河闸门控制方式;以九江市两河7 号初雨调蓄池为研究对象进行应用分析.结果表明:① 九江市两河 7 号调蓄池服务片区存在显著的初雨冲刷效应,前50%的初雨径流可携带约80%的污染物.② 通过识别初雨调蓄池的关键收水时段可以在满足污染物收集目标的同时显著降低初雨调蓄池的运行管理费用.将收水时间范围设置为3 h,20240727 和20240911 两场降雨事件的调蓄池最大水深分别下降了 51.8%和 67.8%,但污染物的平均收集率达 80%以上.研究成果可为水质在线监测缺失情形下初雨调蓄池的调度运行提供参考.
Initial rainwater storage tanks are critical facilities for intercepting runoff with high pollutant loads in the initial rain-fall stage and mitigating urban water environmental pollution.However,restricted by multiple factors including costs,maintenance conditions and technical constraints,it is generally difficult to obtain online water quality monitoring data to guide the real-time operational regulation of initial rainwater storage tanks.Current methods based on total initial rainwater volume control cannot re-spond to the temporal variations of stormwater pollutant loads,resulting in the phenomenon of"storing clean runoff while dischar-ging polluted flow"and a waste of storage capacity,which makes it difficult to maximize the operational efficiency of storage tanks.To address this issue,this study proposes a control strategy based on the cumulative pollutant load ratio.Based on field mo-nitoring and numerical simulation data of typical initial rainfall events,this study analyzes the first-flush effect of initial rainwa-ter,identifies the critical water collection period required to meet the pollutant load control target,and further optimizes the control modes of the storage tank and overflow discharge gates.The No.7 initial rainwater storage tank in the Lianghe area of Jiujiang City is taken as the research object for empirical application analysis.The results show that:① A significant first-flush effect exists in the service catchment of the target storage tank,with the first 50%of initial rainwater runoff carrying approximately 80%of the total pollutants;② Identifying the critical water collection period can significantly reduce the operation and management costs of the storage tank while satisfying the pollutant collection target.When the water collection duration is set to 3 hours,the maximum water depth of the tank decreased by 51.8%and 67.8%respectively for the two rainfall events on July 27,2024 and September 11,2024,while the average pollutant collection rate remained above 80%.The findings of this study can provide a reference for the operation and scheduling of initial rainwater storage tanks in the absence of online water quality monitoring.
罗鑫燃;彭寿海;王殿常;赵强;王万琼;谢家强
中国长江三峡集团有限公司 长江经济带生态环境国家工程研究中心,湖北 武汉 430014中国长江三峡集团有限公司 长江经济带生态环境国家工程研究中心,湖北 武汉 430014中国长江三峡集团有限公司 长江经济带生态环境国家工程研究中心,湖北 武汉 430014中国长江三峡集团有限公司 长江经济带生态环境国家工程研究中心,湖北 武汉 430014中国长江三峡集团有限公司 长江经济带生态环境国家工程研究中心,湖北 武汉 430014中国长江三峡集团有限公司 长江经济带生态环境国家工程研究中心,湖北 武汉 430014
建筑与水利
初雨径流污染初雨调蓄池累积污染负荷运行成本控制策略九江市
initial rainwater runoff pollutioninitial rainwater storage tankcumulative pollutant loadoperation and manage-ment costcontrol strategyJiujiang City
《人民长江》 2026 (7)
81-88,8
中国长江三峡集团有限公司项目(NBWL202300014)国家重点研发计划项目(2022YFC3203200)
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