Weirs are fixed barriers across a river or stream that force water to flow over their tops, where the height of the water above the weir can be used to calculate flow.

What are two environmental problems associated with water diversion? Decreased water volume will increase salinity, harming the animal’s health. What is a benefit of diverting water for urban consumption? It’s necessary for health, such as maintain hygiene or cleaning supplies.

Hydropower: The harnessing of flowing water—using a dam or other type of diversion structure—to create energy that can be captured via a turbine to generate electricity. Impoundment: A body of water formed by damming a river or stream, commonly known as a reservoir.

Dams: A dam is a big wall constructed across a valley to control the flow or raise the level of water held within a catchment area. A weir is a steel or concrete barrier constructed across a river or creek that regulates water flow and allows water to be slowly released to users downstream.

In a weir you could be placing yourself under a weight of water, which in a way is dangerous. The height of a weir affects its strength. ‘The power of the water varies with the flow rate, and when flow rates increase it gets heavier, and can trap a swimmer against a rock or obstruction,’ says Lynne.

The only main difference between dam and weir is that dam can store water comparatively for longer duration than weir and the dam is at more height than the weir. 7.

Weirs are commonly used to control the flow rates of rivers during periods of high discharge. Sluice gates (or in some cases the height of the weir crest) can be altered to increase or decrease the volume of water flowing downstream.

Dam is created as a barrier that stops or restricts the flow of water or underground streams. Whereas, Reservoir is an open-air storage area (usually formed by masonry or earthwork) where water is collected and kept in quantity so that it may be drawn off for use.

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. Turbines are placed at these sluices to capture the energy as the water flows in and out.

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.

Tidal Barrages

They are often used to control and stabilize water flow for irrigation systems. Both the dam and barrage are barriers constructed across a river or natural water course for diverting water into a canal mainly for purposes of irrigation, water supply etc. or into a channel or a tunnel for generation of power.

Dams are important because they provide water for domestic, industry and irrigation purposes. Dams often also provide hydroelectric power production and river navigation. Domestic use includes everyday activities such as water for drinking, cooking, bathing, washing, and lawn and garden watering.

arch dam

Rigid dams constructed using different rigid materials are discussed below.

• Masonry Dam. Masonry dams are built using either stone masonry or brick masonry.
• Concrete Dam. Concrete is most commonly used material to construct a dam.
• Timber Dam.
• Steel Dam.
• Earthen Dam.
• Rock Fill Dam.
• Gravity Dam.
• Arch Dam.

India is a land rich with history, and one of its many wonders is the Kallanai Dam. Also known as the Grand Anicut, the dam is thought to be the oldest dam in the world that’s still in use. The dam is now in the Indian state of Tamil Nadu, but its history goes back around 1,750 years before the creation of the state.