摘要
本文分别用BrooksandCorey ,vanGenuchten和Broadbridge White模型拟合了太行山山前平原不同层次土壤水分特征曲线 (SWC) ,并用Mualem和Burdine模型计算了土壤非饱和导水率(K)和扩散率 (D)。最能较好计算实验地点D和K的方法是用vanGenuchten模型拟和SWC(约束条件m =1- 2 /n) ,用Burdine方法计算K和D。
Seven sets of data from the piedmont of Mt.Taihang were used to evaluate three widely used equations:Brooks & Corey,van Genuchten and Broadbridge White,on the description of soil retention curves.The results showed that the all three equations gave relative good description of water content and water potential,but there were discrepancies between calculated K and D from the retention curves using Burdine and Mualem analytical functions and the measured K and D values The best model for calculation of K and D at the sampling site is using van Genuchten equation to describe the retention curves with the condition of m=1-2/n,then using Burdine analytical function to calculate K and D
出处
《华北农学报》
CSCD
北大核心
2001年第2期75-82,共8页
Acta Agriculturae Boreali-Sinica
基金
中国科学院与澳大利亚ACIAR合作项目! (LWR1/ 95 / 0 7)支持
