摘要
通过室内试验与计算机数值模拟相结合的方法建立蒸发条件下土壤水分运动数学模型,采用交替方向隐式差分法进行求解,利用试验资料总结土壤蒸发率与表土(0～5cm)含水率经验关系为对数曲线关系,并利用拟合关系式作为数学模型的边界条件。经验证,计算机数值模拟结果与实测结果吻合较好,表明利用该方法模拟蒸发条件下蓄水单坑土壤水分运动的问题是可行的。
Through combining the lab research with numerical simulation of soil moisture evaporation, the mathematic model of soil moisture movement under the evaporation conditions was established. The alternate implicit scheme method was used to solve the numerical simulation. Based on the test data, the logarithm curve between soil moisture evaporation ratio and external soil moisture （0 -5 cm） was set up as the boundary condition of the mathematic model. In general, the computational results from the methods fit the experiment results well.
出处
《安徽农业科学》
CAS
北大核心
2009年第33期16474-16475,16478,共3页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金项目(50379031)
山西省科技攻关项目(051115)
关键词
蓄水坑灌法
数值模拟
土壤蒸发
土壤水分运动
Storage pit irrigation
Numerical simulation
Soil evaporation
Soil moisture movement
