为了有效地控制突发性水污染事故带来的危害,以东北某大型水库为典型研究案例,综合考虑水库水文、气象条件和污染物迁移特征,拟定典型工况,基于已建立的三维水动力和水质耦合模型,模拟分析突发性污染事故发生后库区污染物三维空间分布及随时间变化的特征。结果表明受入库流量和全年主导风向东北风的影响,总体上污染物随着水流沿西南岸线向坝址方向扩散,且污染物的超标面积逐渐增大;但随着流程的增加,污染物的浓度逐渐减小。通过对水库水质的数值模拟,定量掌握了水库水质实时状态以及污染物空间分布,可以为有关部门制定与实施应急预案提供相关的技术依据。
Abstract
:To prevent from and control the effect of emergent water pollution accident in reservoir area, the temporal and spatial variations of pollutants in the reservoir after the accident were simulated by a 3-D model coupling hydrodynamics and water quality at typical working conditions. Factors of hydrology, meteorology and contaminant movement were taken into account. A large reservoir in the northeastern area of China was taken as a case study. Results revealed that affected by inflow and dominant wind in northeast direction, the contaminants spread toward the direction of the dam site along the southwest coastline, and the area of standard-exceeding contaminants increased gradually; but the concentration of contaminants decreased gradually with the flow process. Through simulation of the water quality, the spatial distribution of contaminants is quantitatively obtained, which offers technical basis for emergency treatment.
关键词
突发性水污染事故 /
水质 /
水库 /
污染物三维空间分布 /
三维数值模拟
Key words
emergent water pollution accident /
water quality /
reservoir /
spatial distribution of contaminants /
3-D numerical simulation
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