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The referential grain size and effective porosity in the Kozeny-Carman model

Urumović, Kosta; Urumović, Kosta
The referential grain size and effective porosity in the Kozeny-Carman model // Hydrology and earth system sciences, 20 (2016), 5; 1669-1680 doi:10.5194/hess-20-1669-2016 (međunarodna recenzija, članak, znanstveni)

The referential grain size and effective porosity in the Kozeny-Carman model

Urumović, Kosta ; Urumović, Kosta

Hydrology and earth system sciences (1027-5606) 20 (2016), 5; 1669-1680

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Hydraulic conductivity ; effective porosity ; referential grain size

In this paper, the results of permeability and specific surface area analyses as functions of granulometric composition of various sediments (from silty clays to very well-graded gravels) are presented. The effective porosity and the referential grain size are presented as fundamental granulometric parameters expressing an effect of the forces operating on fluid movement through the saturated porous media. This paper suggests procedures for calculating referential grain size and determining effective (flow) porosity, which result in parameters that reliably determine the specific surface area and permeability. These procedures ensure the successful application of the Kozeny-Carman model up to the limits of validity of Darcy’s law. The value of effective porosity in the referential mean grain size function was calibrated within the range of 1.5 μm to 6.0 mm. The reliability of the parameters applied in the KC model was confirmed by a very high correlation between the predicted and tested hydraulic conductivity values (R²=0.99 for sandy and gravelly materials ; R²=0.70 for clayey-silty materials). The group representation of hydraulic conductivity (ranging from 10-12 m/s up to 10-2 m/s) presents a coefficient of correlation of R2=0.97 for a total of 175 samples of various deposits. These results present new developments in the research of the effective porosity, the permeability and the specific surface area distributions of porous materials. This is important because these three parameters are critical conditions for successful groundwater flow modeling and contaminant transport. Additionally, from a practical viewpoint, it is very important to identify these parameters swiftly and very accurately.

Izvorni jezik

Znanstvena područja
Rudarstvo, nafta i geološko inženjerstvo


Projekt / tema
181-1811096-3165 - Osnovna hidrogeološka karta Republike Hrvatske (Željka Brkić, )

Hrvatski geološki institut

Časopis indeksira:

  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus