Effects of Macropore on Soil Specific Water Capacity and Unsaturated Hydraulic Conductivity
Abstract：Take the silt loam soil of Dongyang town of Qixia district of Nanjing city for example,the van Genuchten model parameters of soil water characteristic curve were obtained by fitting measured date of undisturbed soil which include macropore and disturbed soil which not include macropore.Then,expressions of soil specific water capacity and unsaturated hydraulic conductivity were obtained.On this basis,comparative analysis is made with the soil water movement parameters＇ similarities and differences of undisturbed soil and disturbed soil,and emphatically analysised the influence of macropore to them.The results showed that,due to the effect of soil macropore,with the same soil water content,the specific water capacity of disturbed soil is 1 to 2 order of magnitude larger than undisturbed soil,and the difference of them is decreasing with the soil water suction increasing,the unsaturated soil hydraulic conductivity of disturbed is less than undisturbed soil,the difference maybe 2 to 3 order of magnitude.
Keywords：soil water characteristic curvesoil macroporespecific water capacityunsaturated hydraulic conductivity
Publication Date：2012-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 1-5 )