Understanding the internal structure of permeable and impermeable sediments (e.g. point-bars and tidal-flat deposits) generated by the evolution of meandering tidal channels is essential for accurate modeling of groundwater flow and contaminant transport in coastal areas. The detailed reconstruction of stratal geometry and hydraulic properties from measurements must be accompanied by depositional history information. In this work, we use high resolution reconstructions of ancient tidal channels of the Venice Lagoon (Italy) to drive 2D simulations of groundwater flow and transport, showing the importance of incorporating information on the sediment accumulation processes into the hydraulic characteristics and how horizontal anisotropy emerging from these processes significantly influences transport. Effective hydraulic conductivity is modeled with a heterogeneous 2D anisotropic tensor with principal directions aligned with observed sedimentation sequences. Comparison of flow and solute dynamics simulated using reconstructed and theoretical hydraulic properties show drastically different pathways of solute propagation.

了解由曲折潮汐通道演变产生的可渗透和不可渗透沉积物（例如点坝和滩涂沉积物）的内部结构对于准确模拟沿海地区的地下水流和污染物迁移至关重要。通过测量对地层几何形状和水力特性的详细重建必须伴随着沉积历史信息。在这项工作中，我们使用威尼斯泻湖（意大利）古代潮汐通道的高分辨率重建来驱动地下水流动和输送的 2D 模拟，展示了将沉积物积累过程信息纳入水力特征以及水平各向异性如何出现的重要性从这些过程中显着影响运输。有效水力传导率使用非均质 2D 各向异性张量建模，其主要方向与观察到的沉积序列一致。使用重建和理论水力特性模拟的流动和溶质动力学的比较显示了溶质传播的截然不同的途径。