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
539
1 score
img:equations//538_542_e.jpg
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2223
Inlet wing wall, or Upstream wing wall
Wing wall connecting the abutments with the banks of the parent channel or the banks upstream of the structure.
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2224
Outlet wing wall, or Downstream wing wall
Wing wall connecting the abutments with the offtaking channel section downstream of the structure.
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2226
Curtain wall, or Cutoff wall
1 - A cross wall built under the floor of a hydraulic structure with the object of dividing the work into suitable compartments. 2 - A thin wall or footing constructed downward from, under or around the headwall and lipwall of a dam or any other hydraulic structure to provide resistance to seepage or to increase the path of seepage is called a cut-.....
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2239
Divide wall, Divide groyne, Division wall, or Dividing wall
A longitudinal wall or groyne separating the undersluices pocket section from the weir or barrage section (illustrated).
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2372
Core-wall type rockfill dam
A rockfill dam that has a core wall of steel, concrete (plain or reinforced) or compacted earth in the centre and loose rockfill is dumped on both sides......
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2534
Core wall, Membrane, or Core
1 - A wall of masonry, sheet piling, or compacted puddled clay built inside an earth dam or a levee to reduce percolation (illustrated). 2 - See 5963......
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2546
Cutoff wall, or Cutoff
1 - A wall, collar, or other structure of impervious character intended to reduce percolation of water along otherwise smooth surfaces or through a porous strata. It is provided within or on the foundations (illustrated). 2 - See 1432, 2226 and 3337......
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2836
Invert wall, or Bucket lip wall
The upturned portion of the invert having a lip (illustrated).
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2862
Baffle wall, or Baffle
A cross wall, a set of vanes or guides, a grid, grating or similar device placed in a conduit to check eddy currents below them, and to effect a more uniform distribution of velocities to dissipate energy......
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2864
Splitter wall, Divider wall, or Vanes
Longitudinal walls provided in open channels or basin expansions, for recovery of head and equalization of outlet velocity or reduction in expansion length......
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3202
Core wall
A wall of masonry, sheet piling, puddled clay, etc., built inside a bank to reduce percolation.
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3203
Sand core
Sand-filled depth in a bank to inhibit animals from burrowing.
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3337
Staunching wall, Cutoff, or Cutoff walls
1 - A transverse wall projecting from an abutment, usually at right angles, into the embankment to intercept seepage. 2 - See 1432, 2226 and 2546......
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3577
Overpour wall, or Overflow wall
The spilling part of a canal overflow spillway consisting of a masonry or concrete wall.
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3628
Crosswall, or Transverse wall
The wall that forms the drop from the upper sill to the chamber floor (illustrated).
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4351
Core drill
A drill designed to remove cylindrical cores from the drill hole.
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4352
Core barrel
A tube, inside the drill pipe and supported by the bit, to receive the core.
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4355
Core bit
The hollow cylindrical bit of a core drill.
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5963
Core
1 - A cylindrical piece of geological formation cut and raised by a core drill. 2 - See 2534.
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6576
Ecoregions
Geographical regions that have broad similarities with respect to soil, relief and dominant vegetation.
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8016
Impervious core
A core of an earth dam or levee constructed of puddled or compacted clay or other material, designed to place a water barrier between the upstream and downstream faces......
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8349
Chipset, Core Logic
Two or more integrated circuits which control the interfaces between the system processor, RAM, I/O devises, and adapter cards......
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