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effective porosity

effective porosity
1. The proportion of the total pore space in a rock which is capable of releasing its contained water. Clay, for example, may have a total porosity of 50 per cent or more, but little if any of the water contained in these pores may be released, because of the retentive forces (e.g. surface tension) that hold it within the rock.

2. The proportion of the pore space through which groundwater flow occurs. For example, in fractured rocks the majority of flow occurs in the fractures, and intergranular pore water may be almost static. In porous rocks some pores may have only one connection with the general pore space (‘blind’ pores) and so contain only static water.

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effective porosity

effective porosity
1. That proportion of the total pore space in a rock which is capable of releasing its contained water. Clay, for example, may have a total porosity of 50% or more, but little if any of the water contained in these pores may be released, because of the retentive forces (e.g. surface tension) that hold it within the rock.

2. The proportion of the pore space through which groundwater flow occurs. For example, in fractured rocks the majority of flow occurs in the fractures, and intergranular pore water may be almost static. In porous rocks, some pores may have only one connection with the general pore space (‘blind’ pores) and so contain only static water.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
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"effective porosity." A Dictionary of Earth Sciences. . Encyclopedia.com. 14 Jul. 2018 <http://www.encyclopedia.com>.

"effective porosity." A Dictionary of Earth Sciences. . Encyclopedia.com. (July 14, 2018). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/effective-porosity

"effective porosity." A Dictionary of Earth Sciences. . Retrieved July 14, 2018 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/effective-porosity

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Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.

Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:

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American Psychological Association

http://apastyle.apa.org/

Notes:
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  • In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.