首页   按字顺浏览 期刊浏览 卷期浏览 THEORETICAL APPROACH TO THE SOLUTION OF THE INFILTRATION PROBLEM
THEORETICAL APPROACH TO THE SOLUTION OF THE INFILTRATION PROBLEM

 

作者: A.C. LIAKOPOULOS,  

 

期刊: International Association of Scientific Hydrology. Bulletin  (Taylor Available online 1966)
卷期: Volume 11, issue 1  

页码: 69-110

 

ISSN:0020-6024

 

年代: 1966

 

DOI:10.1080/02626666609493444

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

The one-dimensional transient downward entry of water in unsaturated soils is investigated theoretically. The mathematical equation describing the infiltration process is derived by combining Darcy's dynamic equation of motion with the continuity and thermodynamic state equations adjusted for the unsaturated flow conditions. The resulting equation together with the corresponding initial and boundary conditions constitues a mathematical initial boundary value problem requiring the solution of a nonlinear partial differential equation of the parabolic type. The volumetric water content is taken as the dependent variable and the time and the position along the vertical direction are taken as the independent variables. The governing equation is of such nature that a solution exists for t > 0 and is uniquely determined if two relationships are defined, together with the specified state of the system, at the initial time t = 0 and at the two boundaries. The two required relations are those of pressure versus permeability and pressure versus volumetric water content.

 

点击下载:  PDF (1658KB)



返 回