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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 .
Tidal stream, harnessing kinetic energy of the tidal streams and currents flowing around the coastline using free-stream turbines. There could be up to 20 GW of tidal range resource in the UK, able to generate 30 TWh/year or around 12% of the UK's electricity demand. [1] A recent review of the tidal stream resource in the UK and British Channel ...
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.
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
Diagram of a plan to harness tidal power on the River Severn circa 1921. Caption from Popular Mechanics Magazine 1921 Barrage locations considered over the years. A huge tidal range and high level of surrounding industry and population have long made the Severn Estuary and Bristol Channel a focus for tidal energy schemes and ideas.
Sihwa Lake Tidal Power Station is the world's largest tidal power installation, with a total power output capacity of 254 MW. When completed in 2011, it surpassed France's 240 MW Rance Tidal Power Station, which was the world's largest for 45 years. It is operated by the Korea Water Resources Corporation.
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:
Tide mills are usually situated in river estuaries, away from the effects of waves but close enough to the sea to have a reasonable tidal range. Cultures that built such mills have existed since the Middle Ages, and some may date back to the Roman period. A modern version of a tide mill is the electricity-generating tidal barrage.