摘要
基于非饱和土壤水动力学理论,通过计算机模拟方法,应用HYDRUS-3D软件建立了地下涌流根灌土壤水分轴对称三维数值模型,采用Galerkin有限元分析法对土壤水分运动状况进行了数值模拟。利用土壤入渗试验剖面含水率指标的实测值与模拟值来验证模型的正确性。结果表明,相对误差基本在10%以内,吻合良好,表明所建模型可以用于分析供试土壤条件下水分运动状况,可为涌流灌溉系统的合理设计及运行提供一定的理论依据。
Based on the unsaturated soil water dynamics theory, by means of computer simulation, a three-dimensional axial-symmetrical model under subsurface flow root irrigation is established by using HYDRUS-3D software. Soil water movement is simulated with the aid of Galerkin finite element method. The model is validated through the contrast of measured values with simulated values of the soil moisture. The results show that the relative error between simulated and measured values is less than 10%, which indicates that the predictability of the model is acceptable. This study can provide theory guidance for flow root irrigation system design.
出处
《节水灌溉》
北大核心
2017年第8期64-68,共5页
Water Saving Irrigation
基金
河南广播电视大学
河南省教育厅2017年度河南省软科学研究项目"基于水资源承载力的河南省社会经济发展模式研究"(172400410471)
关键词
涌流根灌
HYDRUS-3D
模拟
水分运移
flow root irrigation
HYDRUS-3D
numerical simulation
soil water movement
