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  

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

作　　者：李志新[1,2] 许迪[1,2] 李益农[1,2] 章少辉[1,2] 

机构地区：[1]中国水利水电科学研究院水利研究所 [2]国家节水灌溉北京工程技术研究中心,北京100048

出　　处：《水利学报》2009年第6期673-678,687,共7页Journal of Hydraulic Engineering

基　　金：国家863计划重点项目课题(2006AA100210);中国水科院博士生学位论文创新研究课题

摘　　要：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。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 convectiondispersion 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.

关 键 词：畦灌施肥 溶质运移 集成模拟 非饱和土壤 地表水流 

分 类 号：S275.3[农业科学—农业水土工程] S153.3[农业科学—农业工程]