畦灌施肥条件下地表水流溶质运移模型研究  

Development and validation of surface fertigation flow and solute transport model

作　　者：李志新[1] 许迪[1] 李益农[1] 

机构地区：[1]国家节水灌溉工程技术研究中心,中国水利水电科学研究院,北京100044

出　　处：《干旱地区农业研究》2009年第1期147-151,172,共6页Agricultural Research in the Arid Areas

基　　金：国家863计划现代农业技术领域重点项目课题(2006AA100210)

摘　　要：以零惯性量模型作为畦灌施肥水流模型,一维的对流扩散方程ADE作为地表溶质运移方程,分别采用隐式格式有限差和特征线法分别进行数值求解,建立了畦灌施肥地表溶质运移模型,并利用田间试验数据对模型进行了试验验证,以期为实现畦灌施肥技术参数优化组合提供合理可行的模型工具。研究结果显示:建立的畦灌施肥地表溶质运移模型是合理可行的,可作为畦灌施肥技术要素优化组合的模拟工具。The surface fertigation solute transport model is developed with zero-inertia model as irrigation flow model and one dimension ADE equation as surface solute transport equation, and solving them separately with the methods of Preissman format finite difference and characteristic curve. It provides an effective model tool to optimize designation of technical parameters combination for fertigation. The research results show that there is good agreement between the measured data and the predicted result by the model, so the suggested model could offer an important tool for optimization of technique factors combination for fertigation; in the fertigation experiment, the research results with both the solutes of ammonia nitrogen and Brare similar, so the research results in both conditions can be referred to by each other.

关 键 词：畦灌施肥 水流 溶质运移 对流-弥散 

分 类 号：S275.3[农业科学—农业水土工程] S153.5[农业科学—农业工程]