The movement of water into soil, a portion of which is evaporated or transpired (evapotranspiration), a portion of which may move to surface streams (interflow), and a portion of which moves downward to the saturated zone (recharge).
(1) Penetration of freshwater or groundwater into the sewer system through cracks, defective joints in the pipeline, and holes, or through lateral connections, manholes or inspection chambers. (2) All extraneous waters (storm water and ground water) which enter the wastewater collection system through various sources including, among others, pipe defects, defective service connections, manhole covers, roof leaders, and foundation drains.
1) the absorption of water into the ground, expressed in terms of inches/hour. 2) the penetration of water from the soil into sewer or other pipes through defective joints, connections, or manhole walls.
The penetration of water from the land surface into the soil, or the penetration of water from the soil into a sewer system by such means as defective pipes, pipe joints or connections, or manhole walls.
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.
the downward movement of water into the soil. The rate of absorption of surface water by soil (the infiltration capacity) depends on the amount of surface water, the permeability and compactness of the soil,and the extent to which it is already saturated with water. Once in the soil, water may pass into the bedrock to form a ground water.
The downward entry of water into the soil. The infiltration rate is a function of surface wetness soil texture, surface residue cover, irrigation application or precipitation rate, surface topography and other factors.
The downward entry of water into the Earth's surface. Infiltration usually refers to water movement into a soil or rock surface while the terms hydraulic conductivity, percolation, and permeability usually relate to water movement within a soil or rock layer.
the movement of water into soil or porous rock. Infiltration occurs as water flows through the larger pores of rock or between soil particles under the influence of gravity or as a gradual wetting of small particles by capillary action.
The process or rate at which water percolates from the land surface into the ground. Infiltration is also a general category of BMP designed to collect runoff and allow it to flow through the ground for treatment.
The ingress of groundwater into the sewer through defects, joints or manholes. The four terms used to describe this are : SEEPER The slow ingress of water. The usual indication of this type of infiltartion is that the joint or crack 'glistens' in the light of the CCTV cameras. DRIPPER Water dripping in through a crack or faulty joint. RUNNER Water running through a crack or faulty joint. GUSHER Water entering a pipe under pressure through a crack or joint
( Ped.). The process by which liquid water enters the surface soil or zone of aeration. It includes both wetting to the field moisture capacity and the subsequent progressive downward movement of free water by gravity flow. (After Kittredge). Cf. Percolation ; Seepage.
The movement of water through the soil surface. Soils with a high infiltration capacity allow more rain to enter the soil than those with a low infiltration capacity. Runoff will occur when the rate of rainfall exceeds the soil's infiltration capacity. Surface soil structure and texture are important determinants of the infiltration capacity of a soil.
Movement 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.
The downward entry of water through the soil surface by means of its pores or small openings. ___________________________________________________________________________________________________ ___________________________________________________________________________________________________ ___________________________________________________________________________________________________
The process of filling the pores of a compact with a lower melting temperature metal or alloy. It is one means of forming low cost tooling or making dense structures via molding a porous preform and filling the pores with liquid metal, such as for SiC-Al or W-Cu.
The entry of water into the soil profile through openings in the soil surface. Infiltration capacity, or rate, determines how much water runs off and how much soaks in during rainfall, although after soil pores become filled, the permeability of soil layers below the surface may control water entry.
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.)
Infiltration is the process by which water on the ground surface enters the soil. Infiltration is governed by two forces, gravity, and capillary action. While smaller pores offer greater resistance to gravity, very small pores pull water through capillary action in addition to and even against the force of gravity.
The process by which air leaks into a building. In either case, heat loss results. To find the infiltration heating load factor (HLF), the formula to account for the extra BTU's needed to heat the infiltrated air is
The leaking of outside air into a building through cracks and holes, caused by the pressure differential between the indoor and outdoor air. inorganic Not organic, a compound that is not derived from an animal or plant, derived from a mineral.
The undesirable flow of air into a building through cracks and around doors, windows and other openings in the building envelope. Infiltration is generally accompanied by exfiltration, the flow of air out of the building.
Outside air that enters a structure through openings or cracks in the construction materials, especially windows and doors. "Design" infiltration in residences can range from one-half air change to three air changes per hour, depending on how well the houses are constructed, caulked, or weather-stripped. Average air changes over the heating season are lower. Infiltration is a major area of home heat loss.
The uncontrolled inward air leakage through cracks and interstices in any building element and around windows and doors of a building caused by the pressure effects of wind or the effect of differences in the indoor and outdoor air density or both.
The process by which air leaks into a building. To find the infiltration heating load factor (HLF), the formula to account for the extra BTUs needed to heat the infiltrated air is BTU/HR = building volume x air changes x BTU/cu.ft/hr x TD (temperature difference).
Infiltration is the unintentional or accidential introduction of outside air into a building, typically through cracks in the building envelope and through use of doors for passageFundamentals volume of the ASHRAE Handbook, Ch. 27, ASHRAE, Inc., 2005. Infiltration is sometimes called air leakage. The leakage of room air out of a building, intentionally or not, is called exfiltration.
Enemy soldiers posing as refugees (wearing traditional Korean white robes over their uniforms) easily blended in with the millions of South Koreans who had fled their home to avoid the war. Once behind friendly lines, these infiltrators regrouped and attacked Allied positions from the rear.
movement (usually on the ground) through or into an area or territory occupied by either friendly or enemy troops or organizations; the movement is made either by small groups or by individuals, at extended or irregular intervals, usually while avoiding contact] see also: exfiltration; insertion
Infiltration is the diffusion or accumulation (in a tissue or cells) of substances not normal to it or in amounts in excess of the normal. The material collected in those tissues or cells is also called infiltration.