Search results
Results from the WOW.Com Content Network
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.
A dam is a barrier that stops or restricts the flow of surface water or underground streams. ... A weir (sometimes called an "overflow dam") is a small dam that is ...
In hydraulic engineering, a nappe is a sheet or curtain of water that flows over a weir or dam. The upper and lower water surface have well-defined characteristics that are created by the crest of a dam or weir. [1] Both structures have different features that characterize how a nappe might flow through or over impervious concrete structures. [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.
Weir dams help control the flow of water downstream from large dams. For 60 years before the weir dam was built in 1995, the Clinch River flowed unevenly out from Norris Dam depending on when and ...
Roller dams are a type of weir, or a dam that is designed to allow water to flow over the top in continuous action. They are used on rivers or other such moving bodies of water where erosion damage is undesirable, yet likely to occur. A short wall, lip, or parabolic channel is constructed on the downstream side of the dam parallel to the dam face.
Dam: A dam is a barrier that stops or restricts the flow of surface water or underground streams, or water reservoir resulting from placing such a structure. Delta: the location where a river flows into an ocean, sea, estuary, lake, or reservoir. Distributary or distributary channel: a stream that branches off and flows away from the main ...
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]