蓄水坑灌单坑土壤水分运动模型的有限体积法求解  

Numerical Simulation for Single Pit Soil Water Movement of Water Storage Pit Irrigation

作　　者：李京玲[1] 孙西欢[1] 马娟娟[1] 李建文[1] 张文杰[1] 

机构地区：[1]太原理工大学水利科学与工程学院,太原030024

出　　处：《农业机械学报》2011年第5期63-67,85,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(50979065);山西省科技攻关资助项目(2007031069)

摘　　要：基于土壤水分运动的动力学方程,建立了蓄水坑灌单坑土壤水分运动的数学模型及边界条件,利用有限体积法对模型进行了求解。为了验证所建模型的准确性,在室内进行了蓄水单坑水分入渗试验。模拟结果和试验结果的对比表明,土壤湿润锋和含水率的模拟值与实测值吻合较好,说明所建立的蓄水单坑二维土壤水分运动模型是正确的,采用有限体积法求解是可行的。该模型可作为预测蓄水坑灌条件下单坑土壤水分运动的有效工具。Based on the theory of soil water dynamic,a simulating model and boundary conditions for the soil water of water storage single pit irrigation were established,and the model was numerically solved by finite volume method.The results showed that good agreement was obtained between simulated and measured wetting front and soil moisture content.It indicated that the mathematic model was correct and the model solving with finite volume method was feasible.It is concluded that the model could be used to implement water transport in soil under the water storage single pit.

关 键 词：蓄水坑灌 土壤水分运动 有限体积法 数值模拟 

分 类 号：S275.2[农业科学—农业水土工程]