Si Hu, Bi Hai-pu
College of Resource & Environment Science, Chongqing University, Chongqing 400030, China.
Huan Jing Ke Xue. 2008 Sep;29(9):2432-6.
The water self-clarification ability in the reservoir area is much lower and the risk of the emergency of water pollution is more serious after the accomplishment of water storage in Three Gorges. This paper presented a hydrodynamic model for emergency of water pollution by the investigating the water states in Three Gorges, validated the veracity of the model by comparing flow velocity on the selected cross sections between the computed and measured data, and introduced numerical method to give visual show of the pollutant' s diffusion and to study the movement roles of pollutant after an accident. Further, analyzing the actual instance and characteristic, the decay process of pollutant was numerically simulated after controlling polluting source and taking decontaminating measure in river, and the effect of emergency measure was analyzed and discussed. It is more helpful for emergency to make a scientific decision in the respect of selecting control areas and methods after a pollution accident, putting forward a new way to effectively prevent and control water pollution.
三峡蓄水后库区水体自净能力大幅降低，水污染突发事件风险加剧。本文通过对三峡库区水体状态的研究，建立了水污染突发事件的水动力模型，通过对比选定断面计算流速与实测流速验证了模型的准确性，并引入数值方法直观展示污染物扩散情况，研究事故发生后污染物的运移规律。此外，结合实际情况与特点，对控制污染源及采取河道去污措施后污染物的衰减过程进行了数值模拟，并分析讨论了应急措施的效果。这有助于在污染事故发生后科学决策选择控制区域与方法，为有效防控水污染提供了新途径。
