基于Hydrus-1D的滨海围填造陆区包气带中污染物运移的数值模拟

Numerical simulation of pollutant transport in aeration zone of coastal reclamation land area based on Hydrus-1D

本文利用Hydrus-1D以某典型围填造陆区入驻企业污染源泄漏为例,模拟污染物进入包气带后的运移过程,结果表明:随着污染源的渗漏和切断,包气带中污染物的浓度逐渐升高并趋于稳定,在只有对流-弥散的作用下,污染物会长久地存在于包气带内;随着污染源的泄漏,污染物逐渐下移,在较短时间内便会穿透包气带进入地下水含水层,从而对场地内潜水产生污染。

In this paper,hydrous-1D was used to simulate the movement of pollutants in the aeration zone by taking leakage of pollution sources of enterprises settled in a typical reclamation area as an example.According to the results,with the leakage and cut-off of pollution sources,the concentration of pollutants in the aeration zone gradually increased and tended to be stable.Only under the effect of convection and dispersion,the pollutants existed longtermly in the aeration zone.With the leakage of pollution sources,the pollutants gradually moved down and penetrated the aeration zone and entered the groundwater aquifer in a short time,which could pollute the phreatic water in the site.