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降雨灌溉蒸發(fā)條件下蘋果園土壤水分運(yùn)動(dòng)數(shù)值模擬
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Numerical Simulation for Root Zone Soil Moisture Movement of Apple Orchard under Rainfall-irrigation-evaporation
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    摘要:

    根據(jù)土壤水動(dòng)力學(xué)原理和果樹根區(qū)土壤水分運(yùn)動(dòng)特點(diǎn),，建立了降雨灌溉蒸發(fā)條件下含根系吸水項(xiàng)的二維土壤水分運(yùn)動(dòng)數(shù)學(xué)模型，采用有限元法求解,，對(duì)降雨灌溉蒸發(fā)條件下的地表邊界條件進(jìn)行處理,。在田間進(jìn)行了灌溉蒸發(fā)條件下果園土壤水分運(yùn)動(dòng)驗(yàn)證試驗(yàn)，采用田間實(shí)測(cè)土壤含水率分布資料對(duì)模型進(jìn)行驗(yàn)證,，結(jié)果表明模擬值與實(shí)測(cè)值吻合較好,，所建的根區(qū)土壤水分運(yùn)動(dòng)模型是正確的，采用有限元法求解是可行的,，該模型可用于預(yù)測(cè)果園田間土壤水分運(yùn)動(dòng),。

    Abstract:

    Under rainfall-irrigation-evaporation, 2-D soil moisture movement mathematical model including root water uptake function was established, and solved by finite element method based on soil hydrodynamics theory and root zone soil moisture movement characteristic. The model was verified by the data of the measured soil moisture content in filed. The computational results were in accordance with the measured, which indicated that the mathematic model of soil water movement is correct, and that solving of the model with finite element method is feasible. The model can be used to simulate the soil moisture distribution rule.

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郭向紅,孫西歡,馬娟娟.降雨灌溉蒸發(fā)條件下蘋果園土壤水分運(yùn)動(dòng)數(shù)值模擬[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2009,40(11):68-73.Numerical Simulation for Root Zone Soil Moisture Movement of Apple Orchard under Rainfall-irrigation-evaporation[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(11):68-73.

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