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A barrage is a type of low-head, diversion dam which consists of a number of large gates that can be opened or closed to control the amount of water passing through. This allows the structure to regulate and stabilize river water elevation upstream for use in irrigation and other systems.
The word dam can be traced back to Middle English, [1] and before that, from Middle Dutch, as seen in the names of many old cities, [2] such as Amsterdam and Rotterdam. Ancient dams were built in Mesopotamia and the Middle East for water control. The earliest known dam is the Jawa Dam in Jordan, dating to 3,000 BC. Egyptians also built dams ...
By general definition, a dam is a barrier that impounds water or underground streams, hence tailings dams are relegated to a separate list. Data on volume of structure is not as easily available or reliable as data on dam height and reservoir volume.
A weir / w ɪər / or low-head dam is a barrier across the width of a river that alters the flow characteristics of water and usually results in a change in the height of the river level. Weirs are also used to control the flow of water for outlets of lakes, ponds, and reservoirs.
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Barrage (military science), a wide range of structures, devices, or measures for destroying something to constrain or impede the movement of troops and forces. Barrage (artillery), a line or barrier of artillery or depth charge fire; Barrage (dam), a type of dam; Barrage balloon, a tethered balloon used as an obstacle to attacking aircraft
A dam is a water reservoir in the ground, confined by a barrier, embankment or excavation, on a pastoral property or similar. The term is found widely in South African, Australian [1] and New Zealand English, and several other English dialects, such as that of Yorkshire. [2] The term can be found in the old English folk song Three Jolly Rogues:
A head's location varies with the height of the water level against the dam. Since there is only an extremely low flow within the reservoir so no water level gradient, the head can be clearly seen: where the farthest watercourse discharges into the reservoir.