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A percolation test (colloquially called a perc test) is a test to determine the water absorption rate of soil (that is, its capacity for percolation) in preparation for the building of a septic drain field (leach field) or infiltration basin. [1] The results of a percolation test are required to design a septic system properly.
A septic tank is an underground chamber made of concrete, fiberglass, or plastic through which domestic wastewater flows for basic sewage treatment. [2] Settling and anaerobic digestion processes reduce solids and organics, but the treatment efficiency is only moderate (referred to as "primary treatment"). [2]
In places where infiltration basins or septic drain fields are planned to dispose of substantial amounts of water, a percolation test is needed beforehand to determine whether the intended structure is likely to succeed or fail. In two dimensional square lattice percolation is defined as follows.
PERC, Perc or perc may refer to: Shortened form of percocet; Acronym for preservation, enhancement, restoration or creation (of a natural resource) in environmental mitigation; Perc test (percolation test), for determining the water absorption rate of soil; PERC Reporting Standard, the European standard for mineral reporting
Groundwater recharge or deep drainage or deep percolation is a hydrologic process, where water moves downward from surface water to groundwater. Recharge is the primary method through which water enters an aquifer. This process usually occurs in the vadose zone below plant roots and is often expressed as a flux to the water table surface.
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Approximately 2% of Ireland's water resources are abstracted for human use. Unaccounted-for water constitutes 41% of total water supply, followed by supply for domestic demand (39%), and non-domestic demand (20%). [18] The River Lee is a source of water supply for the city of Cork. 80% of the Irish population is served by centralised water ...
In statistical physics and mathematics, percolation theory describes the behavior of a network when nodes or links are added. This is a geometric type of phase transition, since at a critical fraction of addition the network of small, disconnected clusters merge into significantly larger connected, so-called spanning clusters.