土壤水分特征曲线单一参数模型的建立及应用  

Establishment and application of one-parameter model of soil water characteristic curve

作　　者：宋孝玉[1] 李亚娟[1] 李怀有[2] 沈冰[1] 

机构地区：[1]西安理工大学西北水资源与环境生态教育部重点实验室,西安710048 [2]黄委会西峰水土保持科学试验站,西峰745000

出　　处：《农业工程学报》2008年第12期12-15,共4页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金(50209016);陕西省自然科学基金(2007E235);陕西省教育厅自然科学计划项目(08JK406)

摘　　要：在对甘肃省南小河沟流域不同地貌类型、不同质地土壤样品的土壤水分特征曲线进行试验测定的基础上,建立了南小河沟流域土壤水分特征曲线的单一参数模型,通过实测值对模型进行检验。结果表明:单一参数模型预测的土壤水分特征曲线与实测土壤水分特征曲线比较接近,而该模型参数少,结构简单,可进一步推广应用。The soil water characteristic curve of 56 soil samples from different landform types and different kinds of soil texture in Nanxiaohegou basin was tested,and the one-parameter model of soil water characteristic curve was established based on experimental data of 56 soil samples in Nanxiaohegou basin,Gansu Province,China.The model was proved by the measured data.The results indicate that one-parameter model has high accuracy and can be used to describe the soil water characteristic curve.The unique parameter of the model can be used as the variable coefficient to describe the spatial variability of soil hydraulic properties.It is useful in describing the spatial distribution of soil water characteristic curve in basin scale.

关 键 词：土壤水分特征曲线 一参数模型 壤质地 貌类型 

分 类 号：S157.2[农业科学—土壤学]