Record details

Title
    Tortuozita jako hydrologická charakteristika?
Statement of responsibility
    Karel Jahoda
Other titles
    Tortuosity as a hydrological characteristics?
Author
    Jahoda, Karel
Language
    česky
Source title - serial
    Journal of Hydrology and Hydromechanics
Vol./nr.
    Roč. 47, č. 2
Pages
    s. 93-102
Year
    1999
Notes
    2 obr., 3 diagr., 7 bibl.
    Anglické resumé
    Zkr. název ser.: J. Hydrol. Hydromech. (Bratislava)
Subject group
    distribuce normální
    hydrodynamika
    křivost
    model fyzikální
    porozita
    terminologie
    vodivost hydraulická
Keyword
    Charakteristika
    Hydrologická
    Jako
    Tortuozita
Abstract (in english)
   In the Encyclopaedia of Geologic Sciences [2] the tortuosity is defined as "...a function (square) of the ratio of the travel distance lx of a water particle through a porous zigzagging channel to the shortest distance l between the initial (A) and the terminal (B) points of flow.". This raises the question, why the tortuosity is defined just as (lx/l) , not directly as the ratio (lx/l), clearly characterizing the extension of the travel distance in the zigzagging channel. Another question is, how to apply the tortuosity at the calculation of hydraulic conductivity of the granular environment. This is usually defined as a function of the grain size d10 or, as a case may be, a function of the size heterogenity of grains d60/d10. The point is how to proceed in case in the environment with the size homogenity of grains, where neither d10 nor d60 exist. One such a case was subject to an experimental and theoretical exploration on a physical model.
   As the same time, the problem was being solved whether it is practically possible to achieve the closest (hexagonal) arrangement of the spherical grains of equal size. In this study, an attempt was made to explain the mentioned definitions of tortuosity an to answer the other questions as well
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    25. 3. 2008
Import date
    8. 8. 2012