孔隙网络模型在土壤水文学中的应用研究进展

非饱和土壤的水力性质是采用模型定量模拟水分和溶质在非饱和带中运动的最重要的物理参数,可以用网络模型来预测。孔隙网络模型的主要优点在于可以对发生在土壤孔隙尺度上的物理、化学过程进行直观的表达和模拟。目前,国内外研究者已在样品图像获取、图像分析、模型建立以及求解等方面取得了一定的进展。在对其进行综合评述的基础上,指出了已有网络模型在建立过程中存在的不足之处,并进一步明确了今后的研究方向。

Recent advances in pore-scale network modeling in vadose zone hydrology

The effective hydraulic properties of unsaturated soil are the key parameters in the quantitative modeling of water flow and solute transport in the vadose zone,which can be predicted by the pore network model.The major advantages of the pore network model are the direct and exact representation of the pore space topology and the pore-scale modeling of transport phenomena in soil.In recent years,the considerable progresses have been made in the image acquisition and processing,the pore network generation and the numerical solution techniques of the pore-scale models.The recent advances in pore network modeling in the vadose hydrology are reviewed,and the problems and the future development of this technique are also discussed.