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新疆农业大学水利与土木工程学院,新疆农业大学水利与土木工程学院,新疆农业大学水利与土木工程学院,新疆农业大学水利与土木工程学院 新疆乌鲁木齐830052,新疆乌鲁木齐830052,新疆乌鲁木齐830052,新疆,乌鲁木齐,830052
Published:2006
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[1]唐亚莉,董文明,赵晶晶,等.优化算法确定土壤水分特征曲线的分析[J].新疆大学学报(自然科学版),2006(02):240-243.
唐亚莉, 董文明, 赵晶晶, et al. 优化算法确定土壤水分特征曲线的分析[J]. Journal of Xinjiang University (Natural Science Edition in Chinese and English), 2006, (2).
通过探讨直接法测定土壤水分曲线的诸多不便
引入Van-Genuchten(1980)模型
对其进行对数简化
以沙性土壤为样本
通过对Van-Genuchten模型中的参数n、β进行线性回归分析
确定出了土壤性质的关键性参数
并把计算与实测的土壤水分特征曲线进行了对比.结果表明
该模型的计算值与实测值吻合的非常好
说明通过优化法确定非饱和土壤水分特征曲线是可行的.
In this paper
through discussing the inconvenience of determining soil moisture characteristic curve with direct-methods
the Van-Genuchten(1980) Model is put forward and simplified on logarithm. This paper also make a kind of sandy soil as a sample and determines the key parameters of soil characteristic through using the linear regressive algorithm to analyze the parameters in the Van-Genuchten Model. The result shows that the values of computation agree with the experimental data fairly well through comparing calculating soil moisture characteristic curve with the experimental one.
MILLY P C D.Estimation of the Brooks-Corey parameters from water retention data[J].Water Resour,1987,23:1085-1089.
GARDNER W R,HILLEL D,BENYAMIN Y.Post irrigation of soil water:I.Redistribution[J].Water Resour,1970a,6:851-861.
GARDNER W R,HILLEL D,BENYAMIN Y.Post irrigation of soil water:II.Simultaneous redistribution and evapo-ration[J].Water Resour,1970b,6:1148-1153.
VAN GENUCHTEN Van Genuchten M Th.,A closed-from equation for predicting the hydraulic conductivity of unsat-urated soils[J].Soil Sci.Soc.Am,1980,44:892-898.
RUSSO D.Determining soil hydraulic properties by parameter estimation:on the selection of a model for the hydraulic properties[J].Water Resour,1988,24:453-459.
雷志栋,杨诗秀,谢森传.土壤水动力学[M].北京:清华大学出版社1988:224-228.
虎胆·吐马尔白.非饱和土壤水分运动参数的分析[J].新疆大学学报,1996,13(3):80-85.
张蔚榛,张瑜芳.包气带水分运移问题讲座(二)土壤水分运动参数的测定方法[C].张蔚榛论文集.武汉:武汉大学出版社,2002,12:421-423.
李法虎,傅建平,孙雪峰.土壤水分运动参数的确定及其灵敏性能分析[J].灌溉排水,93,12(2):6-14.
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