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Irrigation Dictionary : Table of Contents (members login required)\t
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Term No.Term NameTerm Description
8616Decision modelA model used to select the most favourable solutions from among the alternatives that are available according to established criteria......
8617Decision Support SystemsSystems for helping planners in making their decisions......
8618Decision treeA graphical model that delineates all the alternatives and their possible consequences; it helps to facilitate the task of decision analysis......
8619Decision variable1 - The controllable and partially controllable inputs are called decision variables. 2 - See 8622......
3805Deck bridgeA bridge in which the carriageway is built at or near the top level of the main supporting members of the superstructure......
5909DeckingBoards or planks used to form the facing, or shutters to concrete floor slabs......
2345Deckless buttress dam, Massive head buttress damA type of buttress dam when the face slab is replaced by flaring the upstream edges of the buttresses to span the distance between buttress walls. The.....
8447DecoderA device that determines the meaning of a set of signals and initiates a computer operation based thereon......
6334DecodingReversing the effects of encoding, to reproduce the original message......
6907DecomposersOrganisms, mostly microorganisms and bacteria, that feed on decaying organic matter......
7401Decomposition of wastewaterThe breakdown of organic matter in wastewater by bacterial action, either aerobic or anaerobic......
8527Decomposition, or Aggregation model A model that aids in the breaking down of an apparently singular system into smaller pieces that are, perhaps, more manageable, or in the putting toge.....
8862Deconcentration Involves shifting the workload from a central government ministry or agency headquarters to field staff; creating a system of field administration thr.....
7580Decontamination Activities that remove or reduce the levels of hazardous substances in an area to make the area safe for the activities it supported prior to contamin.....
8128DecrementThe reduction of the numerical contents of a counter. A decrement of 1 is usually assumed, unless otherwise specified. It is the complementary operati.....
868Deep percolation1 - In a geologic sense, this is the amount of water that is lost from a basin area by leakage through the geologic formation. 2 - With respect to irr.....
4903Deep percolationSee 868......
1861Deep seepageDownwards water movement in soil (and rock) beyond the range of most plant roots......
4167Deep well A well that obtains water, at least partially, from one or more aquifers lying between the impermeable strata......
4488Deep-well pumpA pump used for lifting water from deep wells, the pumping mechanism usually being installed within the well at a considerable depth below the surface.....
4524Deep-well turbine pump, or Bore-hole pumpA vertical shaft centrifugal pump with a rotating impeller or impellers, suspended from the pump head by a column or eduction pipe that also serves as.....
7333Deep‑well disposalThe deposition of raw or treated, filtered hazardous waste or contaminated waters by injection into deep wells......
9232Definite plan reportA report, following the project report, presenting the findings and conclusions for such further investigations as are necessary to determine the deta.....
8914Definite project planThe planning stage following detailed investigations and comprising (i) some studies and exploratory work, if required, (ii) preparation of a plan wit.....
6456DeflationThe complete removal of loose material by the wind leaving rocks exposed to continuous weathering......
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