土壤水动力弥散系数的室内测定  

Experimental Determination of Coefficient of Sole Hydrodynamic Dispersion

作　　者：翟春生 邵爱军[2] 彭建平[2] 张永强[2] 

机构地区：[1]青岛地矿岩土工程有限公司,山东青岛266071 [2]石家庄经济学院,石家庄050031

出　　处：《南水北调与水利科技》2007年第5期87-89,共3页South-to-North Water Transfers and Water Science & Technology

基　　金：河北省自然科学基金贫助项目(D2004000480);河北省博士基金资助项目(B2002218)

摘　　要：用粉砂壤土进行了室内非饱和水动力弥散试验,依据质量守恒原理,推导了水动力弥散系数的计算公式,根据垂直土柱法测定的土壤水盐动态数据,计算了非饱和粉砂壤土的水动力弥散系数,并建立了该土壤水动力弥散系数与孔隙流速之间的关系。该方法物理概念清楚,计算公式简单实用。Hydrodynamic dispersion experiment was done with unsaturated silt loam. Depend on mass conservation law, the formulas to calculate coefficient of hydrodynamic dispersion was developed. According to the data of soil water and salt regime measured from the upright soil column, the coefficient of hydrodynamic dispersion was calculated, and the relation between hydrodynamic dispersion and average flow velocity in soil voids was built up. This approach has clear concept of physics,and the formulas are simple and applied.

关 键 词：水动力弥散系数 溶质通量 非饱和土壤 

分 类 号：S273[农业科学—农业水土工程]