摘要
土壤饱和导水率的空间分布是流域水文模拟及溶质运移研究的先决条件。基于塔里木河干流108个剖面的土壤质地、有机质及容重等测试数据,运用4种土壤传递函数(PTFs)进行土壤饱和导水率预测与检验,分析土壤饱和导水率的空间变异性并计算合理采样数量,并通过尺度上推的方法预测流域尺度土壤水力参数的空间分布特征。结果表明:Campbell模型为4种PTFs模型中最适合本研究区的土壤传递函数。从空间分布的预测结果来看,不同层土壤饱和导水率的分布特征具有相似性,而深层土壤饱和导水率大于浅层。
The spatial distribution of soil saturated hydraulic conductivity is the core factors of the watershed hydrological and solute transport modeling.A total of 108 soil profile data were taken from the mainstream of Tarim river basin,saturated soil hydraulic conductivities of different depth were estimated by 4 pedotransfer functions.The spatial variation characteristics were evaluated by using classic statistical methods.The scalingup methods were used to predict the spatial distribution of soil saturated hydraulic conductivity in the Tarim River Basin.Results showed that among the four PTFs,CAMPBELL function was the most suitable pedotransfer function for our study area.The spatial distribution characteristics of soil saturated hydraulic conductivity of different depth had the comparability,and the deep layer's soil saturated hydraulic conductivity was larger than the shallow's.The scaling-up methods of saturated soil hydraulic conductivities could provide basic soil hydrological parameters for arid inland area.
出处
《中国沙漠》
CSCD
北大核心
2014年第6期1584-1589,共6页
Journal of Desert Research
基金
国家科技支撑计划项目(2013BAC10B01)
国家自然科学基金项目(41371011
41001133
4117095)
国家基础研究发展计划项目(2013CB429905)资助
关键词
土壤质地
土壤传递函数
饱和导水率
塔里木河
soil texture
pedotransfer functions
saturated hydraulic conductivity
Tarim River Basin
