Permeability
* Defines the ability of a rock or sediment to transmit fluid.
* Some permeability is caused by infection.
* affects distribution.
* allows water and other liquids to flow through and collect in the rock.
* characteristic that allows the oil and gas to flow through the rock.
* decreases with higher frequency ferrites.
* depends on oncotic pressure, and on pre and post capillary resistances.
* determines how fast fluids, such as water, move underground.
* facilitates absorption.
* function of particle size and distribution
  - soil texture, structure, and pore space
  - the size of pore openings
* is affected by many soil characteristics
  - the pressure in a rock
  - an expression of the connectedness of the pores
* is controlled by an electric phenomenon, which is influenced by magnetic fields
  - the size and continuity of the soil pores
  - dispositions
  - equal to velocity of flow divided by hydraulic gradient
  - inversely proportional to the water-cement ratio
  - magnified in economic and trade policy
* is measured in the micro darcy to nanodarcy range
  - thousandths of a darcy or millidarcys
* is moderate in the solum and moderately slow or slow in the densic materials
* is moderate in the surface layer and slow in the subsoil
  - and subsoil and rapid or very rapid in the substratum
  - and subsoil and slow or very slow in the substratum
  - upper part of the solum and slow or very slow in the substratum
* is moderate or moderately rapid in the solum and rapid in the substratum
  - the solum and rapid or very rapid in the substratum
  - the surface layer, subsoil, and substratum
* is moderate or moderately slow in the solum and moderate to slow in the substratum
  - the subsoil and slow or very slow in the substratum
* is moderately rapid in the sandy mantle and slow in the till substratum
  - mantle and slow in the underlying material
  - soil and very slow in the underlying bedrock
  - surface layer and rapid in the subsoil and substratum
* is moderately rapid or rapid in the solum and rapid or very rapid in the substratum
  - the solum and very rapid in the substratum
  - rapidly in the solum and rapid or very rapid in the substratum
* is moderately slow in the loamy materials and slow in the underlying till
  - subsoil and slow in the substratum
  - or slow in the loamy material and slow in the underlying till
  - porosity
  - rapid in the organic layers and slow in the clayey material
* is rapid in the solum and rapid or very rapid in the substratum
  - substratum of the sandy substratum phase
* is rapid or very rapid in the solum and very rapid in the substratum
  - the surface layer and underlying strata
  - the underlying glacial outwash
  - throughout the soil
  - rates
  - related to the connectedness of the void spaces and to the grain size of the rock
  - slow in soil derived from the amphibolite
* is the ability of a material to transmit water
  - rock or mineral to transmit fluids
  - substance to conduct magnetic lines of force easily
  - fluids to flow through rock
* is the ability of water to flow through rock
  - run through soil
* is the capability of a rock or sediment to allow the passage of fluids
  - capacity to move into and through an area
  - ease of air and water movement through soils
* is the ease with which fluids flow through a rock or sediment
  - liquids pass through rocks or a layer of soil
  - extent to which a solid allows the flow of a fluid
  - inductance per unit length
  - measure of how easily something flows through a substance
  - parameter that controls how much air can flow through the pore space in snow
  - property that governs the rate of flow of a fluid into a porous solid
  - speed at which water travels through the soil
  - very rapid in the sandy mantle and moderately rapid in the underlying material
* is very slow and water loss is mainly by evaporation
  - when the soil is saturated and rapid when it is dry and cracked
* largely affects the durability of hardened concrete.
* means that animals can swim and burrow through the sand with remarkable ease.
* measure of how easily an ion can cross the membrane
  - gases or liquids can pass through a material
  - porous something is
  - well the spaces are connected
* measure of the ability of a material to transmit fluid under a hydraulic gradient
  - to concentrate magnetic fields
* quantitative measure of the ease of water movement through aquifer materials.
* reduces the quantity of water placed in storage.
* refers to how connected pore spaces are to one another
  - easily water passes through sediments and rock
  - well a material transmits water
* refers to the ability of a soil to transmit water or air
  - water to move through a soil
  - ease with which resin flows through a preform
* refers to the rate at which water drains through the soil
  - water moves through soil
* results in accumulation.
* varies with magnetic field.