填海造陆区潜水含水层水动力弥散试验研究

Experimental Study on Hydrodynamic Dispersion of Submerged Aquifer in Reclamation Land

弥散系数作为地下水溶质运移模型中的关键参数,一直由于其尺度效应的影响,而大多采用经验值。随着国家对地下水污染防控的重视,对模型预测结果的准确性要求也越来越高。以南港工业区为研究背景,以罗丹明为示踪剂,通过野外径向弥散试验,采用一维流场、二维弥散的水动力弥散模型求解弥散系数,最终得到场地内纵向弥散系数为0.012 m^2/d,横向弥散系数为0.006 m^2/d。为南港地区开展填海造陆区地质环境承载力研究提供了第一手的基础数据。

The diffusion coefficient is a key parameter in the groundwater solute transport model.It has always been empirically influenced by its scale effect.As the state attaches importance to the prevention and control of groundwater pollution,the accuracy requirements for model prediction results are also increasing.Taking the Nangang Industrial Zone as the research background,using Rhodamine as the tracer,the diffusion coefficient was solved by the one-dimensional flow field and the two-dimensional diffusion hydrodynamic dispersion model through the field radial dispersion test,and the longitudinal diffusion coefficient in the site was finally obtained as 0.012 m^2/d,the lateral diffusion coefficient is 0.006 m^2/d.It provides first-hand basic data for the study of geological environment carrying capacity of reclamation land in Nangang area.