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Irrigation Dictionary : Table of Contents (members login required)\t
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Term No.Term NameTerm Description
928S-curve, or S-curve hydrographA graph showing the summation of the ordinates of a series of unit hydrographs spaced at unit-rainfall duration intervals. It represents the hydrograp.....
1776S-ValueMilliequivalents of exchangeable metallic cations in 100 grams of exchange (absorbing) complex......
8298S-VideoA video format offering a higher quality signal than composite video, but a lower quality than component video. This mid-level format divides the sign.....
4137Sacrosanct landLand unlikely to yield a tangible benefit from flood alleviation, such as common land, nature reserves, recreation areas......
2773Saddle siphon, or Hood siphonA siphon having its duct formed of a U-shaped hood. The inlet lip of the hood is submerged below the full reservoir level and that of the outlet lip t.....
2816SAF basinStilling basins designed by Saint Anthony Falls Hydraulic Laboratory, USA, for drainage structures. They have an end sill and a row each of chute bloc.....
5389Safe velocityThe greatest velocity at which it is possible to let water flow in a drainage channel without causing erosion or washing of the banks......
3971Safe yieldWith reference to either the surface-water or groundwater supply, the rate of diversion or extraction for consumptive use that can be maintained indef.....
2387Safe yield of reservoir basin, or Safe yield of catchmentThe annual runoff flowing from the basin into the reservoir that can be depended upon for utilization......
5999Safety fuseA device consisting of a train of enclosed black powder that is used as a medium to convey a flame to an explosive. The flame will travel along the fu.....
1208Sag correctionThe amount by which soundings must be reduced to obtain true vertical values......
3757Sag pipe, or Sag lineTerms sometimes used for syphon or inverted siphon......
4608Sailab irrigation (a term used in India and Pakistan)Irrigation by flood waters which are allowed to spread, without control, first on the bottom of rivers, then the surplus water flowing out through was.....
2144Sajong soils, or Shachiang soilsSoils containing 85 per cent calcium carbonate and having lime concentrations of ginger root size......
4451Sakia, Saqia, Saqiya, Sakieh or SakiyehA kind of water wheel used in Egypt for lifting water up to two metres. It consists of a double-sided all metal wheel that has volute-shaped compartme.....
7815Salic horizon Soil horizon enriched by soluble salts......
8807Salient features of a projectThe important data of a project briefly listed by which its nature, magnitude and scope could be gauged......
6980SalientiaToads......
7731Saline Referring to water that contains dissolved salts, usually at concentrations from 10 000 to 33 000 mg/l......
7732Saline contamination Contamination of water by intrusion of salt water......
5147Saline sodic soilA soil with sufficient exchangeable sodium to interfere with the growth of most crop plants and containing appreciable quantities of soluble salts......
2138Saline soilA non-sodic soil containing sufficient soluble salt to impair its productivity. The electrical conductivity of the saturation extract is greater than .....
5148Saline soilA non-sodic soil containing soluble salts in such quantities that they interfere with the growth of most plants......
8815Salinity controlAbatement or prevention of salt water contamination of agricultural, industrial and municipal water supplies, or reducing alkaline salts and preventin.....
9170Salinity control benefitsBenefits based on value of damage prevented, reduction in costs, and increased use, similar to flood control......
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