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Irrigation Dictionary : Table of Contents (members login required)\t
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Term No.Term NameTerm Description
1626B horizonIs a mineral horizon in which rock structure is obliterated or is but faintly evident, characterized by one or more of the following features: a) an i.....
2787Baby siphon type water seal, or Maramsilli baby siphon type water sealA water seal provided by a baby siphon which by virtue of being at a lower level gets primed earlier and its issuing jet itself seals the downstream e.....
2788Baby siphon, or Maramsilli baby siphonA smaller siphon operating at a lower level than the main siphon in the Maramsilli baby siphon. Sometimes, the baby siphon is also referred to as `Mar.....
7024BacillariophytaDiatoms......
7095BacillusA rod-shaped bacterium. .....
7985Back of levee, Air side of levee, Land side of levee, Outflow side of levee, Inner side of levee, Polder side of levee, or Down stream side of leveeThe side of a levee away from the river, facing the protected area......
1511Back shoreThe part of the shore covered by water during exceptional storms only, especially when combined with exceptionally high water; the zone of the shore l.....
4413Back washing, or Back blowing A method of well development based on the principle of surging or agitating the formation at the well by water or air pressure to prevent bridging of .....
8411Back-endAny software performing either the final stage in a process, or a task not apparent to the user. A common usage is in a compiler. A compiler`s back-en.....
4851Back-washing or Back-flushingA method of cleaning a filter that consists in reversing the direction of the flow in such a way as to carry away the solid particles collected in the.....
3223Backfill1 - Earth or other material placed behind linings or structures. 2 - Replacement of excavated material......
7997Backfill The placement of fill material within a specified depression, hole or excavation pit below the surrounding adjacent ground level, as a means of improv.....
5405BackfillingThe process of refilling a trench or an excavation around a structure......
7106Background concentrationThe pollutant concentration that would remain if all emissions from all sources that are quantified for use in a modelling or calculation process were.....
7466Background incidence The level of incidence of a disease that is endemic to a region, when epidemics of the disease are not occurring......
7107Background levelA pollutant level that is representative of average conditions in a given area.  .....
7235Background radiationThe radiation normally present in the lower atmosphere; from cosmic rays and earth-sources. .....
5068Backhoe, Backshovel1 - Light pullback digging shovel mounted on power driven engine with wheels similar to those of farmland tractor, and fitted in the front with a load.....
6328BackscatteringThe scattering of radiant energy into the hemisphere of space bounded by a plane normal to the direction of the incident radiation and lying on the sa.....
6416BackslopeThe hillslope position that forms the steepest, and generally linear middle portion of the slope.  In profile, backslopes are bounded by a convex shou.....
1415Backwater1 - Water held or forced back as a consequence of some obstruction, such as a dam or regulator, or the swelling up of the river below. 2 - A water res.....
1416Backwater curveThe shape of the surface of water in a stream or open conduit along a longitudinal profile from a point where such a water surface is raised above its.....
1417Backwater effectThe rise in elevation of the surface profile of a stream when the flow is retarded above a dam or any other obstruction, or is backed up into a tribut.....
5406Backwater gateGate installed at the end of a tube, canal, or drain, which gets closed to prevent the downstream water from backing up into them (See also 5417)......
7087Bacteria Single-celled micro-organisms that lack chlorophyll; neither plants nor animals. .....
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