A structure in a canal, dam, etc., to allow the water to overflow when it reaches a certain level, or to keep the water up to the required level.
| 单词 | θ2749 |
| 释义 | the world > the earth > water > body of water > channel of water > [noun] > navigable waterway > canal > other structures in canals (7) overfall1764 A structure in a canal, dam, etc., to allow the water to overflow when it reaches a certain level, or to keep the water up to the required level. aqueduct1791 The similar structure by which a canal is carried over a river, etc. (Also called aqueduct-bridge.) tail-cut1791 see cut, n.2 21a. waste-weir1793 (see quots.). boatlift1839 A large mechanically operated structure used instead of a lock for transferring canal boats from one level to another; (also) a device or apparatus… berm-bank1854 the bank of a canal opposite the towing-path. tail-bay1856 (a) the space between a girder and the wall: cf. bay, n.3; (b) in a canal-lock, the narrow water-space just below the lock, opening out into the… |
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