基于Hydrus-1D的某电厂COD污染物在包气带中迁移规律研究

STUDY ON THE MIGRATION PATTERNS OF COD CONTAMINANT IN AERATION ZONE OF A POWER PLANT BASED ON HYDRUS-1D

摘要: 针对污染物对包气带环境的影响问题，本文采用数值模拟方法，以某电厂COD污染物作为预测因子，由Hydrus-1D软件建立水文地质模型，进行了包气带中污染物运移数值模拟研究，模拟效果反映出污染物运移的规律，结论是：污染物排放简化为连续恒定排放的点源工况下，污染物在包气带下渗过程中，浓度随时间不断减低。距离入渗点越近的位置，污染物浓度越高；距离越远的位置，污染物浓度越低。在土壤纵剖面上，随着深度增大，污染物浓度变化速率逐渐增加。

Abstract: Aiming at the impact of pollutants on the aeration zone environment, this article establish the hydrogeological model by Hydrus-1D software and conduct numerical simulation of contaminant transport in aeration zone with numerical simulation method by taking the COD of a power plant as the predictor. The simulation results reflect the rules of contaminant transport and the conclusion show that under the condition that contaminant discharge is simplified as a constant point source, the pollution in aeration zone move downward with time, the closer to the infiltration point position, pollutant concentration is higher; the farther to the infiltration point position, the lower the concentration of pollutants. In soil profile, along with the depth increase, the pollutant concentration change rate increase.