基于污染源浓度随时间衰减的土壤污染物运移模型

摘要

在实际工程中,无论是垃圾填埋场渗滤液浓度还是疏浚堆场底泥浓度,随着时间的增长,都是会呈现某种衰减变化的规律.本文论述了基于污染源浓度随时间衰减指数形式的初步研究成果,并给出了所建污染物运移模型的解析解.并根据模型解对污染物在北京地区不同类型的土壤:黏土、重粉质黏土、粉质黏土和黏质粉土中的运移情况进行了模拟计算.%The dispersion, convection, adsorption and degradation of contaminant have been calculated in classical contaminant transport model, but the self-attenuation of contaminated source concentration hasn't considered. The concentrate is often decreased as a rule in actual engineering whether filtrate concentration of garbage landfill or substrate sludge concentration of dredging heap. The index form of contaminated source concentrate attenuation with time is given as preliminary research, and the analytic solution of established contaminant transport model is also given. In the end, the transport situation of contaminant in Beijing area on different kinds of soil which are clay, heave silty clay, silty clay and clay silt has been simulated according to the model solution.