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A tidal barrage is a dam-like structure used to capture the energy from masses of water moving in and out of a bay or river due to tidal forces. [ 1 ] [ 2 ] Instead of damming water on one side like a conventional dam , a tidal barrage allows water to flow into a bay or river during high tide , and releases the water during low tide .
The common primary functions of a barrage are: Increase the depth of a river (similar to a weir) Maintain a separation between fresh and salt water; Reduce the risk of tidal flooding up the river; Secondary functions may include: Tidal power generation; Artificial whitewater leisure centres; Form a Coastal reservoir
The Nampho Dam or West Sea Dam, also known as the West Sea Barrage or West Sea Lock Gate, is a tidal barrage located 15 km west of the special city of Nampho, North Korea. It is a large, eight-km-long system of dams, three lock chambers, and 36 sluices , allowing the passage of ships up to 50,000 tons.
Head of tide, tidal limit [2] or tidehead [3] is the furthest point upstream where a river is affected by tidal fluctuations, [4] or where the fluctuations are less than a certain amount. [5] The river section influenced by tides and marine forces, but without salinity is a tidal river. Downstream areas are brackish and termed estuaries. [6]
Tidal mill at Olhão, Portugal. A tide mill is a water mill driven by tidal rise and fall. A dam with a sluice is created across a suitable tidal inlet, or a section of river estuary is made into a reservoir. As the tide comes in, it enters the mill pond through a one-way gate, and this gate closes automatically when the tide begins to fall.
Download QR code; Print/export Download as PDF; Printable version; In other projects Wikidata item; Appearance. ... Tidal barrage * List of tidal barrages; A.
Centre Port plan over The Wash. Plan not to scale; final project may differ to this schematic. Developer Port Evo announced plans in November 2022 to develop a tidal barrage across The Wash. [20] This would include a causeway with an 11-mile (18 km) road along the entire length of the barrage, and also include:
The Barking Creek Barrier, a tidal flood barrier, was constructed in the 1980s as part of the Thames flood defence system, opening in 1983. [4] Like all of the subsidiary gates, it is normally closed before, and opened after, the main Thames Barrier. The barrier is 38 metres wide, held aloft by two 40 metre towers to allow boats to pass at high ...