摘要
为了确定渗流场补充方程Van Genuchten(V-G)公式参数,分别利用经验公式Modified Kovács(MK)模型及滤纸法来确定土水特征曲线,并拟合曲线得出V-G公式中的参数θs、θr、n、αv。采用t检验对两种方法确定的参数进行比较,结果表明:置信度为95%时,MK模型预测参数θs、θr、n与实验确定的参数比较接近,αv超出了置信区间范围。因此在误差允许范围内,使用MK模型来预测V-G模型公式中的参数具有可行性。
For determining the parameters of Van Genuchten model, the empirical Modified Kovács(MK) model and the filter paper method were used to obtain the soil water characteristic curves, and θs, θr, αvand n in the formula were gotten with a fitting method. Comparing the parameters in the two formula with the t- test, the results show that: when the confident level equaled to 95%, V-G parameters from MK model were close to the experimental parameters, but the αvwas not within the confidence interval. The results demonstrate that the MK model can be used to predict V-G parameters.
出处
《土壤通报》
CAS
CSCD
北大核心
2015年第4期873-877,共5页
Chinese Journal of Soil Science
基金
国家自然科学基金(51304113)
国家自然科学基金(51374124)资助
