以南水北调中线工程典型渠段为例，建立了突发水污染事故工况的中线一维圣维南方程和水质数值模型。在考虑污染物的传播速度、渠道水位变幅和水位波动等限制条件下，提出水污染事故下各闸门的应急控制策略，制定闸门的关闭规则，模拟分析不同控制策略下渠道退水量、稳定时间、水位变幅、水质等参数的变化情况，确定保证明渠运行安全的水污染事故应急闸控方案，为中线工程应急预案的建立提供参考。

A one-dimensional hydraulic and water quality model was developed to simulate the sudden water pollution accident in the main channel of Middle Route of South-to-North Water Diversion Project. In consideration of the migration velocity of pollutants and water level variations in the channel, the emergency control strategy of each gate was proposed under the conditions of sudden water pollution accident, the gate closing rules were established, the variations of channel depletion rate, stabilization time, water level fluctuation, and water quality were simulated, and then the control scheme of emergency gate was determined to ensure safe operation of channel under sudden water pollution accident. The results can provide reference for the development of emergency strategy in the Middle Route of South-to-North Water Diversion Project.