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The Okhla barrage (Okhla Weir and Okhla bridge) [2] is a 791 meters [1] or roughly 800-yard long weir across Yamuna River opened in 1874. It also serves as the location of Okhla Bird Sanctuary today.
A barrage dam can be used to divert water for irrigation needs or limit the amount of water downstream. In most cases, a barrage dam is built near the mouth of the river. The site of dam construction needs to be thoroughly investigated to ensure that the foundation is strong enough to support the dam and has low possibility of failing. [2]
A drop structure, also known as a grade control, sill, or weir, is a manmade structure, typically small and built on minor streams, or as part of a dam's spillway, to pass water to a lower elevation while controlling the energy and velocity of the water as it passes over.
The Bhimgoda Barrage, also referred to as the Bhimgoda Weir or Bhimgoda Head Works, is a barrage on the Ganges River at Har ki Pauri near Haridwar in Haridwar district, Uttarakhand, India. Built as the headworks of the Upper Ganges Canal , an initial barrage was completed by 1854 and replaced twice; the final one completed in 1983.
The barrage will be constructed 25 km upstream of river mouth where it enters the Gulf of Khambhat in Arabian Sea and 125 km downstream of Sardar Sarovar dam. A 1.663 km long causeway-cum-weir barrage will be constructed. It will form a reservoir holding 599 MCM of fresh water. The barrage will have 90 gates.
The length of left bank main canal, originating from Durgapur Barrage, is 136.8 km (85.0 mi) and that of the right bank main canal is 88.5 km (55.0 mi). Discharge at head regulator for left bank canal is 260 cubic metres (69,000 US gal) per second and that for right bank canal is 64.3 cubic metres (17,000 US gal) per second.
A side channel of the river with a weir and falling shutters regulated the canal waters. [9] A bridge with 23 arched openings 10 feet wide was constructed for this purpose. [ 10 ] [ 11 ] Modern commentators also note that the canal was constructed with an excessive slope of 0.05 m/km which caused erosion of its bed.
The New Ohkla Barrage is a weir impounding the Yamuna River, southeast of New Delhi. The nature of the Yamanu River has changed substantially since the British built the original Okhla barrage in 1874. The river was known for its fish abundance. Today the river is fed mostly by the outflow of water treatment plants.