| 基于扩散波模型和遗传算法的河道排污口溯源方法研究 |
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| 引用本文： | 郑琼琪,林夷媛,尹海龙,徐祖信,苏蕾,吴闪闪.基于扩散波模型和遗传算法的河道排污口溯源方法研究[J].环境工程,2022,40(6):63-69. |
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| 作者姓名： | 郑琼琪 林夷媛 尹海龙 徐祖信 苏蕾 吴闪闪 |
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| 作者单位： | 1. 同济大学 环境科学与工程学院, 上海 200092; |
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| 基金项目： | 广东省重点领域研发计划项目(2020B1111350001)；;国家自然科学基金面上项目(51979195)； |
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| 摘 要： | 针对河道排污口人工排查成本高且难以做到实时性的问题,建立了基于水流扩散波模型和遗传算法的河道排口反问题溯源方法,并通过突发污染排放的设计算例和河流污染排放实际调查案例进行验证。结果表明:1)反问题模型能有效反演潜在的突发性大流量污染排放,包括排放位置、水量、排放起始时间和终止时间;经过多次运算反演结果的中位值与真实解几乎完全一致。2)对于日常排污口排查而言,该方法可通过合理的水文监测断面布设,准确识别出河流中潜在的多个排污口空间位置和排放水量。3)对于突发排放和日常排污口排查,溯源精度均可达到200 m以内;对应监测站点的布设距离为2 km。因此,该反问题模型可为未来基于在线数据的河道水下排污口动态监管提供技术参考。
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| 关 键 词： | 污染溯源 水动力模型 遗传算法 反问题 河道 |
| 收稿时间： | 2021-12-21 |
SOURCE TRACKING OF WASTEWATER DISCHARGE INTO RIVERS USING HYDRODYNAMIC DIFFUSION WAVE MODEL AND GENETIC ALGORITHM |
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| Affiliation: | 1. College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;2. Guangzhou Resource Environmental Protection Technology Co., Ltd, Guangzhou 510699, China |
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| Abstract: | On-site investigation of sewage outfalls connected to watercourses is labor-intensive,and real-time tracking is hard to be performed manually.Facing with this challenge,an inverse problem method to trace source location and sewage flow based on hydrodynamic diffusion wave model and the microbial genetic algorithm was developed.The developed method was verified with a hypothetical example of sudden wastewater discharge and a real investigation case of sewage discharges into a river.The study results showed that:1) for the tracking of sudden wastewater discharge in large quantity,the inverse problem model could estimate source parameters including source location,source flow rate,starting and ending time of discharge effectively.After multiple runs of modeling,the median values of inversed source parameters were almost identical to the real ones.2) for the routine investigation of sewage outfalls,the developed method could identify the locations and discharge amounts of potential multiple sewage sources accurately,through the rational layout of hydrologic monitoring stations.3) for either the tracking of sudden wastewater discharge or the routine investigation of sewage discharges,the sewage outfall could be located to a spatial grid resolution of fewer than 200 m using the inverse modeling,on condition that the monitoring stations were set up with a spatial interval of 2000 m.Therefore,the developed inverse model could provide a technical solution for dynamic monitoring of sewage outlets connected to rivers in the future,with the support of online data. |
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