冬灌对越冬期土壤水分状况影响的数值模拟  

Numerical Simulation on the Effect of Winter Irrigation on Soil Moisture Regime in Winter

作　　者：尚松浩[1,2] 雷志栋[1,2] 杨诗秀[1,2] 

机构地区：[1]清华大学 [2]清华大学水利水电工程系

出　　处：《农业工程学报》1997年第3期65-70,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金;国家教委博士点基金

摘　　要：根据土壤水动力学、地表能量平衡、空气动力学理论建立了越冬期土壤冻融条件下土壤—大气连续体的水热传输模型，包括冻融条件下土壤水热迁移子模型、地气间水热交换子模型。在该模型的基础上，模拟了北京地区冬灌对越冬期土壤水分状况的影响，从理论上得到了冬灌具有贮水作用的结论，并分析了合理的冬灌定额。Based on the theory of soil water dynamics, the principle of energy budget on soil surface, and the theory of aerodynamics, a model of coupled transfer of the moisture and heat in soil atmosphere continuum during soil freezing and thawing is established. The model is composed of two submodels, i.e., the model of soil water and heat transfer and the model of water and heat exchange between soil and atmosphere interface. The model is used to simulate the effect of winter irrigation on soil water regime in Winter. The result shows that winter irrigation is effective for water storage in soils. Moreover, the rational winter irrigation quota is analyzed.

关 键 词：冬灌 数值模拟 土壤水分 灌溉 

分 类 号：S275[农业科学—农业水土工程] S152.7[农业科学—农业工程]