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Irrigation Dictionary : Table of Contents (members login required)\t
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Term No.Term NameTerm Description
7629Parent material The unconsolidated mass from which the  soil horizons have originated. Also applies to relatively unconsolidated parent rock......
8247ParityA method of verifying the accuracy of binary data after it has been transferred to or from a storage area......
8246Parity bitExtra bit added to a data word as a parity checking device......
3962Parshall measuring flume, Improved Venturi flumeA device to measure the flow of water in open conduits. It consists essentially of a contracting length, a throat and an expanding length. Discharge c.....
240Partial correlationThe correlation between two variates in a conditional distribution when one or more other variables are held fixed. Specifically, the product-moment c.....
2548Partial cutoffA cutoff extending into the underlying stratum but not reaching an impervious subsurface stratum......
55Partial duration series above a given base A list of all events, such as, floods, occurring above a selected base, without regard to the number within a given period. In the case of floods, the.....
4116Partial flood protectionProtection by submersible embankments......
9049Partial performanceThis term conveys the idea of performance that, while sufficient to confer appreciable benefit on the recipient, falls short of the concept of substan.....
8893Partially developed underground water basinAn underground water basin wherefrom the use of underground water does not exceed the naturally occurring recharge but a considerable development, eit.....
3953Partially drowned weirA weir at which the level of water upstream is being affected to some extent by the level of water downstream......
4261Partially penetrating artesian wellAn artesian well which does not reach the bottom of the confined aquifer......
2830Partially submerged jet, or Partially drowned jetA jet whose central line is below the tail water level but not too far below to cause the jet to be drowned out by the tail water during operation......
3680Partially submerged orificeAn orifice with a partially free jet......
4164Partially-penetrating well, or Imperfect well A well that is less than fully penetrating......
5660Particle shape - flakiness and elongation indexA description of length, width and thickness of a particle, say, of aggregate. Determined by tests to determine the flakiness (ratio of the thickness .....
1361Particle size distributionThe relative amount of a sediment sample having a specific size, usually in terms of percentage (by weight) finer than a given size......
5136Particle size distributionDistribution of equivalent diameters of soil particles; usually expressed in terms of cumulative percentages larger or smaller than each of a series o.....
5666Particle size of aggregateGenerally refers to the distribution of size ranges of particles in an aggregate mix, as determined by a standard set of sieves......
7201Particulate matterAny material, except water in uncombined form, that is or has been airborne and exists as a liquid or a solid at standard conditions.  .....
8248PartitioningThe logical grouping of electronic functions within a given set of hardware components......
341Parts per million (PPM)The concentration of a substance (generally a solute or sediment) expressed as its mass divided by the mass of the solution or suspension......
2153Parts per million (PPM)The concentration of a substance expressed as the number of unit weights of that substance per million units of weight. This unit is superseded and mu.....
8496PASCALHigh-level structured programming language used both on micro-computers and for teaching programming......
6983PasserineSmall or medium‑size perching songbirds with grasping feet......
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