The uncontrolled inward leakage of air through cracks and gaps in the building envelope, especially around windows and doors
When water permeates or soaks into the ground, it goes through open spaces and pores in the ground
Movernent of water through the soil surface into the soil, or the quantity of water entering the soil Infiltration is equal to the total precipitation less the losses due to interception by vegetation retention in depressions on the land surface, evaporation, and surface runoff
Groundwater flow entering the wastewater system through cracks or holes in pipes, manholes, or other system components, e g - building foundations
The downward entry of water into the soil This is distinct from percolation, which is movement of water through soil layers or material
1) The penetration of water through the ground surface into sub-surface soil or the penetration of water from the soil into sewer or other pipes through defective joints, connections, or manhole walls 2) The technique of applying large volumes of wastewater to land to penetrate the surface and percolate through the underlying soil See Percolation
1 The penetration of water through the ground surface into sub-surface soil or the penetration of water from the soil into sewer or other pipes through defective joints, connections, or manhole walls 2 The technique of applying large volumes of waste water to land to penetrate the surface and percolate through the underlying soil (See: percolation )
the slow passage of a liquid through a filtering medium; "the percolation of rainwater through the soil"; "the infiltration of seawater through the lava"
The movement of water from the surface of the land through the unsaturated zone and into the groundwater This occurs during and immediately after precipitation events It can also occur at the bottom of lakes and rivers
a process in which individuals (or small groups) penetrate an area (especially the military penetration of enemy positions without detection)
The penetration of water through the ground surface into the soil Once in the soil, water may pass into the bedrock to become groundwater
the process of passing through tissues or through a semi-permeable medium or filter
Movement of water from the ground surface into the soil (Source: Carbon Dioxide Information Analysis Center, 1990)
the process of water moving from the ground surface vertically downward into the soil