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Riverbed permeabilities: information from pooled data.

A Calver1

  • 1Catchment Systems Modelling, CEH Wallingford (formerly the Institute of Hydrology), Wallingford, Oxfordshire, U.K. anc@ceh.ac.uk

Ground Water
|July 13, 2001
PubMed
Summary
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This study compiles hydraulic conductivity values for river channel materials, revealing a wide range (10^-9 to 10^-2 m/s). These data offer guidance for hydrological assessments when site-specific data are unavailable.

Area of Science:

  • Environmental Science
  • Hydrogeology
  • Geotechnical Engineering

Background:

  • River channel-lining materials exhibit variable hydraulic conductivity.
  • Accurate hydraulic conductivity data are crucial for hydrological and hydrogeological assessments.
  • Generalizing these values is challenging due to factors like sediment type, scale, and measurement methods.

Purpose of the Study:

  • To compile and analyze numerical values of hydraulic conductivities for river channel-lining materials.
  • To establish a guideline basis of representative hydraulic conductivity values.
  • To inform hydrological and hydrogeological assessments where specific investigations are not feasible.

Main Methods:

  • Assembling numerical values of hydraulic conductivities from published and unpublished sources.

Related Experiment Videos

  • Analyzing the range and distribution of hydraulic conductivity values.
  • Comparing values derived from numerical modeling with field and laboratory analyses.

    • Main Results:

    • Hydraulic conductivities range from below 1.0 x 10^-9 to above 1.0 x 10^-2 m/s.
    • Values are concentrated between 1.0 x 10^-7 and 1.0 x 10^-3 m/s.
    • Numerical modeling yields more conservative values than field/lab analyses, with significant site variability.

    Conclusions:

    • A broad spectrum of hydraulic conductivity exists for river channel materials.
    • Generalization is complex, influenced by sediment, scale, and methodology.
    • The compiled data serve as a valuable reference for hydrological and hydrogeological assessments.