蒸发条件下非饱和土壤水运动方程的楔形基配点法

为了模拟大田试验的水分分布，对蒸发条件下含根系吸水项的一维非饱和土壤水分运动方程，采用新的数值方法——楔形基配点法进行数值模拟。与传统的差分格式和有限元相比，计算格式简单、方便、实用，并在计算时间和计算误差方面更具有优势。应用土壤剖面含水率的实测值与本文算法的模拟值对模型进行了验证，结果表明，模拟值与实测值之间的拟合效...

Ridge Basis Functions Collocation Method for Soil Water Movement in Unsaturated Soils during Evaporation

To simulate water distribution in field experiment,a new numerical method,Ridge Basis Functions Collocation Method,is presented to give the numerical solutions of one-dimensional water movement in unsaturated soil during evaporation(the water uptake by plant roots).Compared with the traditional finite difference method and finite element method,the new method is easier,more convenient and practical for use.And the advantageous of the method is less calculating time and small error.According to the comparison between the results of simulation and data of field experiment,it shows that the simulated values are coincide well with measured values,and the simulating precision are above 98%,which shows that the proposed model can relatively truly reflect the status of soil moisture movement under evaporation.