北疆供水工程主干渠突发水污染事故污染物运移扩散研究

Pollutant Migration and Diffusion in Sudden Water Pollution in Main Canal of Water Supply Project in North Xinjiang

为制定北疆供水工程主干渠科学、可行的突发水污染事故应急预案,保障供水水质安全,基于MIKE 11的水动力模块(HD)和对流扩散模块(AD)构建了北疆供水工程主干渠00+000—57+300段的水质模拟模型,通过对模型参数的率定和验证,表明该模型具有较理想的模拟效果。研究结果表明:突发水污染事故发生后的一个小时是应急处置的关键时刻;当大量污染物进入渠道时,渠道沿程断面出现污染物浓度峰值持续现象;污染物扩散距离与污染事故发生位置无关;污染物影响范围与流量有关;人工渠道自我净化能力较弱。

In order to propose a scientific and feasible emergency plan for sudden water pollution accidents in the main canal of the water supply project in North Xinjiang and ensure the safety of water supply,the water quality simulation model of 00+000—57+300 sections of main canal of the water supply project in North Xinjiang was established based on MIKE11 HD and AD.The coefficients calibration and model verification indicated that the established model had a good simulation result.The research results are as follows.One hour after the sudden water pollution accident occurs is the critical moment for emergency response.When a large number of pollutants enter the channel,the peak concentration of pollutants along the channel section continues.The pollutant influence distance has nothing to do with the location of the pollution accident.The pollutant influence range is related to the flow.The self-purification ability of artificial canal is weak.