畦灌施肥地表水流与非饱和土壤水流-溶质运移集成模拟：Ⅰ模型

本文基于零惯性量方程和一维对流-弥散方程建立起畦灌溉施肥地表水流溶质运移模型，并利用HYDRUS-2D软件模拟二维非饱和土壤水流溶质运移过程，以一维地表水流溶质运移模拟得到的通量条件作为二维非饱和土壤水流溶质运移模拟的上边界，利用编制的程序将两个模型进行集成，构建起畦灌施肥地表与非饱和土壤水流溶质运移集成模型。基于多时段分步迭代计算方法，实现沿畦长地表入渗溶质通量动态变化条件下的二维非饱和土壤水流溶质运移模拟。

Integrated simulation of surface-subsurface flow and solute transport for border strip fertigation Ⅰ.Model

An integrated model for simulating the surface subsurface flow and transport of solute in border strip fertigation is proposed. Based on the zero inertia flow equation and one dimensional convection dispersion equation the model for describing the solute transport of border strip fertigation is established and the software HYDRUS 2D is utilized to simulate the two dimensional flow and solute transport process in unsaturated soil. The flux condition obtained from the simulation of one dimensional flow and solute transport is used as the upper border condition for simulating two dimensional flow and solute transport in saturated soil. By applying the program developed by the authors, two models are integrated by computational program. On this basis the simulation of surface subsurface flow and solute transport two dimensional under the condition of dynamic infiltration flux in the process of border strip fertigation can be calculated by applying the multi time iterative step by step approach.