Accession Number:

ADA170283

Title:

The Determination of Permeability in in-situ Marine-Floor Sediments.

Descriptive Note:

Memorandum rept.,

Corporate Author:

SACLANT ASW RESEARCH CENTRE LA SPEZIA (ITALY)

Personal Author(s):

Report Date:

1985-11-01

Pagination or Media Count:

43.0

Abstract:

A method of evaluating in situ permeability of unconsolidated marine floor sediments has been developed using mathematical manipulation of previously formulated empirical equations. The final equation makes use of various sediment characteristics that can be mathematically described and used to calculate permeability without greatly disturbing the sediment. The formula requires a knowledge of the soils median grain size, pore shape, porosity, and formation factor the resistivity of the fluid-saturated porous sediment divided by the resistivity of the fluid itself. Calculated permeabilities came to within 16 or less of those measured for a series of natural sands when a simple coefficient was introduced into the equation for the data available. Original calculated permeabilities were consistently close to five times greater than those measured for the same natural sand samples. The need for a coefficient to adjust calculated permeabilities could possibly be due to sorting efforts that were not considered in the derivation incorporation of these effects remains an area of future investigation.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Numerical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE