明渠突发水污染事故段及下游应急调控

针对明渠突发水污染事件应急调控的需求，对突发水污染事件事故段及下游段的应急调控策略进行研究。 应急调控的决策包括：通过污染物特征参数量化方法分析污染物的扩散过程，划分事故段及事故段下游；针对事 故段，通过量化方法计算出整个应急事故的持续时间；针对事故下游段，采用优化分区的方法，识别出不利渠池， 关闭不利渠池下游节制闸，从而达到延长整个事故下游段的供水时间的效果。以中线工程洨河节制闸-古运河节 制闸段模拟发生应急事故为例，研究成果如下：采用污染物特征参数量化方法识别出事故段为洨河节制闸-滹沱河 节制闸，事故段下游为滹沱河节制闸-岗头隧洞节制闸。事故段应急事件持续时间为 7.9?h；事故段下游通过优化 分区的方法识别出两个不利渠池，延长不利渠池供水时间 6.13?d 和 5.61?d。

Sudden water pollution accident section and downstream emergency control of open channel

The middle route of the South-to-North Water Transfer Project is an important source of water for Henan, Hebei, Tianjin, and Beijing, directly benefiting 60 million people. However, water pollution occur frequently in recent years, which not only bring immeasurable impact on the environment but also threaten social and economic development, causing people to worry about the water safety of the open channel water transfer project.Accorded to the demand for emergency regulation and control of sudden water pollution in an open channel, the emergency regulation and control strategies of the accident section and downstream of the accident section are studied. The decision-making of emergency control includes: analyzing the diffusion process of pollutants by a quantitative method of pollutant characteristic parameters, dividing the accident section and downstream of the accident section, and calculating the duration of the whole emergency incident by quantitative method for the accident section. Given the downstream of the accident section, the method of optimizing partition is adopted to identify the unfavorable channel pool and close the control gate downstream of the unfavorable channel pool, and to extend the water supply time of the whole downstream of the accident section.Taking the Xiaohe River control gate - Guyun River as an example, the research results are as follows: Utilizing quantization of pollutant characteristic parameters, the accident section is identified as the Xiaohe River control gate - Hutuo River control gate, Hutuo River control gate - Gangtou Tunnel control gate downstream of the accident section. The duration of the emergency in the accident section was 7.9 h. Downstream of the accident section, two unfavorable drainage pools were identified by optimizing the zoning method, and the water supply time of unfavorable drainage pools was extended 6.13 d and 5.61 d.