两种非饱和导水参数推求方法在紫色土上的应用.pdfVIP

216 Vol. 21 No. 6 200712 Journal of Soil and Water Conservation Dec. , 2007 程冬兵, 蔡崇法* ( , 4 0070) : , , , , , , : ; ; ; : S152.7:A : 1009-2242(2007) 06-014 -04 Application of Two Methods of Estimating Soil Hydraul ic Properties on Purpl e Soil CHENG Dong-bing, CAI Chong-fa ( College of Resource and Environment, H uazhong A gricultural University, Wuhan 4 0070) Abstract: Soil unsaturated hydraulic properties w ere not available w hich restricted the technology of unsaturated, hydraulic simulation to be applied to the field. In this research two representative methods of estimating soil hydraulic properties based on soil w ater retention curve and simple infiltration w ere employed, and unsaturated hydraulic properties w ere estimated and compared by these tw o methods for different textural purple soils The. results show ed that the unsaturated conductivities estimated by soil w ater retention curve and simple infiltration w ere in good agreement with calculated unsaturated conductivities. Because of the advantage of measuring easily - , for soil w ater retention curve and the characters of simple experiment and time saving for the simple infiltration these tw o methods being employed to estimating purple soil unsaturated hydraulic properties w ere feasible. Key words: purple soil; unsaturated conductivity; soil w ater retention curve; simple infiltration , , [ 1] , , [ 2] , , , ,