土壤大孔隙饱和导水率的数值模拟及实验研究  

Experimental Study on the Soil Matrix and Macropore Saturated Hydraulic Conductivity

作　　者：尚熳廷[1,2] 冯杰[3] 丁荣浩 王小军[1,2] 

机构地区：[1]南京水利科学研究院,江苏南京210029 [2]水利部应对气候变化研究中心,江苏南京210029 [3]中国水利水电科学研究院水资源所,北京100044 [4]山东省临沂市水利勘测设计院,山东临沂276001

出　　处：《土壤通报》2012年第1期15-19,共5页Chinese Journal of Soil Science

基　　金：国家自然科学基金(50609005);第十届霍英东教育基金会高等院校青年老师基金(101075);教育部博士点专项科研基金(20050294002)资助

摘　　要：原状土壤饱和导水率的确定将直接影响水及溶质在原状土壤中运动的模拟,进而影响到水文模型及溶质运移模型的模拟精度。为此,将原状土壤分为基质域和大孔隙域,以南京市栖霞区的土壤为例,通过CT扫描结合经验公式法、室内原状土柱实验法分别得到了原状土壤大孔隙的饱和导水率,并对其结果进行了详细的对比分析。结果表明:两种测定大孔隙饱和导水率的方法得到结果的相对偏差在10%以内。Undisturbed s oil saturated hydraulic conductivity will influence the simulated precision of hydrological model directly, and then it will influence the precision of the models of water flow and solute transported in soil. Therefore, the soil of Qixia town in Nanjing was taken for example, through CT scan combined with empirical formula method and experimental measurement, macropore saturated hydraulic conductivity of undisturbed soil columns was acquired. And the detail comparative analysis of them were given. All of their analysis showed that relative deviation of the macropore＇s saturated hydraulic conductivity obtained from the two methods was less than 10%.

关 键 词：土壤饱和导水率 数值模拟 土壤基质 土壤大孔隙 CT扫描 土柱实验 

分 类 号：S152.7[农业科学—土壤学]