| 王建东,龚时宏,马晓鹏,于颖多.地下滴灌条件下水热运移数学模型与验证[J].水利学报,2010,41(3): |
| 地下滴灌条件下水热运移数学模型与验证 |
| Verification and application of mathematical model for simulating water flow and heat transport in subsurface drip irrigation |
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| DOI： |
| 中文关键词: 地下滴灌 水热运移 数学模型 验证 |
| 英文关键词: subsurface drip irrigation water- heat transport mathematical model verification |
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| 中文摘要: |
| 基于土壤水热运动基本方程，结合地下滴灌水分运动特点，建立了地下滴灌水热运移数学模型,利用HYDRUS- 2D软件对模型进行了求解，并用田间实测数据进行验证 模拟和验证结果表明，模型对地下滴灌条件下的土壤水分和土壤温度运移变化动态的模拟效果较好，该水热运移数学模型可以用来监测和调控作物生长所需的土壤水热环境条件模拟值和实测值的结果对比表明，上层土壤的水分和温度的模拟值较下层土壤值差异较明显，且数值波动大，主要原因是上层土壤易受到土壤蒸发和大气温度剧烈波动的影响. |
| 英文摘要: |
| A mathematical model was set up by integrating the basic equation of soil water and heat movement with characteristics of water movement under subsurface drip irrigation，The HYDRUS- 2D software was used to solve the mathematical model. The comparison of simulation value with obse rvation data obtained from field measurement showes that the mathematical model can be satis-factorily used to describe the soil water and heat transport properties and can be used for monitoring and adjusting soil water and heat distribution. Finally，the comparison result between simulation value and the observation value reveales that the soil water and heat value in the upper soil layer exhibit the characteristics of obvious fluctuation and deviation comparing with those in lower soil layer，the main reason is that the water and heat transport in the upper soil layer is easily affected by soil evaporation and atmosphere temperature fluctuation. |
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