Permeability (earth sciences)

Permeability in fluid mechanics and the earth sciences (commonly symbolized as κ, or k) is a measure of the ability of a porous material (often, a rock or an unconsolidated material) to allow fluids to pass through it.

The permeability of a medium is related to the porosity, but also to the shapes of the pores in the medium and their level of connectedness.

Permeability

Permeability is the property of rocks that is an indication of the ability for fluids (gas or liquid) to flow through rocks. High permeability will allow fluids to move rapidly through rocks. Permeability is affected by the pressure in a rock. The unit of measure is called the darcy, named after Henry Darcy (1803-1858). Sandstones may vary in permeability from less than one to over 50,000 millidarcys (md). Permeabilities are more commonly in the range of tens to hundreds of millidarcies. A rock with 25% porosity and a permeability of 1 md will not yield a significant flow of water. Such “tight” rocks are usually artificially stimulated (fractured or acidized) to create permeability and yield a flow.

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Permeability_(earth_sciences)

Latest News for: Soil permeability

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This 3,375-Year-Old Log Could Be the Climate Change Solution We’ve Been Waiting For

Yahoo Daily News 02 Oct 2024

Because the log was naturally entombed in this low-permeability soil, the ravages of fungi, insects, and even oxygen couldn’t reach its woody exterior ... This is a stark example of the benefits of “wood vaulting,” a technique where dead trees are purposefully buried so that low-permeability clay soils can trap greenhouse gasses in the ground....

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This Random 3,775-Year-Old Log Might Hold One Secret To Saving The Planet

IFL Science 01 Oct 2024

So, what could have made this remarkably efficient carbon capture possible? The key appears to be in the type of soil covering the log. a clay soil, common to the area of Quebec where the discovery was made, which has especially low permeability ... because clay soil is pretty common, ......

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Discovery of 3,775-year-old preserved log supports 'wood vaulting' as a climate solution

Phys Dot Org 30 Sep 2024

Their analysis, published on September 27, 2024, revealed that the log had lost less than 5% carbon dioxide from its original state thanks to the low-permeability clay soil that covered it ... The clay soil in that part of Quebec had an especially low permeability, meaning that it ......

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3,775-year-old log inspires wood-based method to store carbon for centuries

Interesting Engineering 26 Sep 2024

The concept is grounded in the discovery of a remarkably well-preserved 3,775-year-old Eastern red cedar log buried in clay soil in Quebec, Canada ... Long-term carbon storage ... The idea is low-cost ... The team attributes this loss to the “low permeability and anoxic nature of the compact clay soil in which it was buried.” ... The press release added ... ....

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Threat to kidneys? One in four water samples from city has high salt content

The Times of India 16 Sep 2024

New Delhi ... 'Salinity is the saltiness or dissolved salt content of a water body ... It is mostly influenced by aquifer material, solubility of minerals, duration of contact, and factors such as the permeability of soil, drainage facilities, quantity of rainfall, and above all, the climate of the area.' ....