International Commission on Irrigation & Drainage Commission Interationale des Irrigation et du Drainage

Multilingual Technical Dictionary (MTD)
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Term No.Term Name/Term DescriptionAction
744
Ice storm
Storm characterized by occurrence of a glaze.
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763
Storm
A significant separable meteorological disturbance accompanied by such phenomena as rain, snow, hail, thunder and lightning, and wind, although wind storms may be described in accordance with the material, such as dust and sand, which is carried in suspension in the air. .....
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765
Storm lane
A narrow belt over which storm centres pass with a certain degree of regularity.
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766
Storm distribution pattern, or Storm smear
The manner in which depth of rainfall varies from station to station throughout the area for a given storm.
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769
Tropical cyclone, Tropical revolving storm, Hurricane, Taino, Cordonazo, Typhoon, Baguio, Baruio, Willy-willy
A revolving storm originating over the ocean in the doldrum belt of general circulation. Known by various names in different parts of the world - hurricane in the Caribbean and western parts of the Atlantic Ocean, also taino in Haiti, cordonazo in the west coast of Mexico, typhoon in Japan and adjacent seas of south-eastern Asia, baguio or baruio i.....
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853
Storm runoff or Storm-water runoff
That portion of the total runoff from storm rainfall that reaches the point of measurement within a relatively short period of time subsequent to the occurrence of rain. It essentially excludes the base flow......
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871
Storm seepage
That portion of the rainfall during a storm which infiltrates into the surface soil, and moves away from the area on which it falls through the upper horizons at a rate much in excess of the normal groundwater seepage......
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950
Design storm
The design storm is that estimate of a rainfall, amount and distribution over a particular drainage area which is accepted for determining the design flood......
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1051
Barrier spring
A spring that occurs when a raising of the confining bed forces the groundwater to rise to ground surface.
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1384
Sudd, or Sadd (Arabic : barrier or dam)
Large floating island of vegetative matter impending navigation on the Upper White Nile. Also an earthen embankment blocking a river or branch of a river or ring bund around a work under construction in the bed of a river......
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2067
Barrier beach
A bar essentially parallel to the shore, the crest of which is above normal high water level. Also called offshore barrier and barrier island......
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2718
Elementary surge tank, or Simple surge tank
It consists of a shaft as close to the turbine gates as possible so as to reduce penstock length and protect maximum lengths of the pipeline (illustrated)......
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2719
Conduit regulator, Surge tank, or Surge chamber
A tank with a free water surface provided at the transition from tunnel or pipeline to penstock to protect the tunnel or pipeline from excessive changes in pressure, particularly the rise in pressure that expeditiously maintains equilibrium in the system by storing or allowing water required for the above purpose. Note - Strictly speaking, `surge t.....
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2720
Multiple surge tanks
More than one surge tank at the transition of the pipeline to a penstock to obtain the same effect with less total area of the tanks (illustrated)......
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2721
Throttled surge tank, or Restricted orifice surge tank
A type of surge tank with the inlet to the surge tank being narrowed for speeding up pressure change (due to greater head loss at the inlet) and quickening the damping of oscillations (illustrated)......
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2722
Differential surge tank
A type of throttled surge tank with an addition of a riser either in the centre or in the side (illustrated).
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2723
Surge shaft with expansion chamber
A kind of surge tank that has an expansion chamber provided at the junction of the surge tank and the pipeline to speed up the pressure change at that point......
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3151
Surge wave
A transilatory wave in an open channel resulting from a sudden change in flow of water, such as that caused by opening or closing a gate......
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3171
Negative surge
A negative surge results from a sudden change in flow that decreases the flow depth. It is a retreating wave front moving upstream or downstream......
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4026
Travelling surges
Hydraulic bores, jumps or other transient waves that occur during the transition period between a sudden change in flow conditions and a new equilibrium in an open channel......
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4411
Surge plunger, or Surge block
Any plunger, piston, or block operated in the casing of a well to surge the water in the sand or gravel formation.
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4415
Open-well method, or Surge method
A method of well development based on a combination of surging and pumping.
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4553
Surge tank
A tank built adjacent to, and hydraulically connected to, pipeline to provide control of flow fluctuations due to surges......
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4662
Surge irrigation
A surface irrigation technique wherein flow is applied to furrows (or less commonly, borders) intermittently during a single irrigation set......
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5008
Surge irrigation
A surface irrigation technique wherein flow is applied to furrows (or less commonly, borders) intermittently during a single irrigation set.   .....
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