摘要
以土壤水动力学为理论基础,对坐水播种土壤水分入渗物理过程进行分析,建立其水分入渗的数学模型,并用有限元方法求解。通过室内入渗试验,检验数学模型的适用性。应用该数值模型,分析了土壤初始含水率、种沟宽度、回土量等因素对水分入渗的影响,并对回土量的选择进行了讨论。
The regulation of water infiltration in furrow of seedbed irrigating was studied. The physical process of soil water infiltration at seedbed irrigating was explained on the basis of soil water dynamics theory. Based on the unsaturated moisture flow equations, the mathematical model has been established. Finite element method was used to solve the equations, and was programmed on computer by Matlab. The numerical simulation results were accordance with the indoor infiltration tests. The numerical model was used to analyze some factors that affected infiltration, including the soilreturning volume, initial soil water content, the width of the furrow. At last,some questions about soilreturning volume were discussed.
出处
《天津农学院学报》
CAS
2003年第2期14-19,共6页
Journal of Tianjin Agricultural University
关键词
坐水播种
土壤水入渗
数值模拟
有限元
seed-bed irrigating
soil water infiltration
numerical simulation
finite element method
