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==Reservoir Stone==
[[File:Particle void ratio.png|thumb|Highest void ratio comes from having uniformly graded aggregate.]]
[[File:Particle permeability.png|thumb|Higher permeability comes from larger, angular, uniformly graded aggregate]]
The important characteristics of the stone within the reservoir or [[underdrain]] are the lack of fines, the void ratio and (to a lesser extent) the permeability.
Porosity and permeability are directly influenced by the size, gradation and angularity of the particles <ref>Judge, Aaron, "Measurement of the Hydraulic Conductivity of Gravels Using a Laboratory Permeameter and Silty Sands Using Field Testing with Observation Wells" (2013). Dissertations. 746. http://scholarworks.umass.edu/open_access_dissertations/746</ref>
Created page with " ==Reservoir Stone== thumb|Highest void ratio comes from having uniformly graded aggregate. File:Particle permeability.png|thumb|Higher perm..."
==Reservoir Stone==
[[File:Particle void ratio.png|thumb|Highest void ratio comes from having uniformly graded aggregate.]]
[[File:Particle permeability.png|thumb|Higher permeability comes from larger, angular, uniformly graded aggregate]]
The important characteristics of the stone within the reservoir or [[underdrain]] are the lack of fines, the void ratio and (to a lesser extent) the permeability.
Porosity and permeability are directly influenced by the size, gradation and angularity of the particles <ref>Judge, Aaron, "Measurement of the Hydraulic Conductivity of Gravels Using a Laboratory Permeameter and Silty Sands Using Field Testing with Observation Wells" (2013). Dissertations. 746. http://scholarworks.umass.edu/open_access_dissertations/746</ref>