Levee
1 a barrier to obstruct the flow of water, esp. one of earth, masonry, etc., built across a stream or river. 2. a body of water confined by a dam. 3. any barrier resembling a dam
A barrier (a dam) creates a reservoir of water which can provide a consistent supply of fresh water. Without the reservoir, the supply of water during some parts of the year would be inadequate for practical purposes.
Dam
water acted as a natural barrier before Romes enemies built ships.
a Levi and a dam
Tigris river and the Euphrates river
The Amazon river and natural springs. However, loggers have polluted many parts of the Amazon river, making drinking dangerous. So some tribes have had water wells built in them by humanitarian aid charities.
They built the Thames Barrier on the river Thames to protect central London from flooding caused by storm surges. This structure consists of movable gates that can be raised to block incoming high water levels during extreme weather events, helping to safeguard the city and its inhabitants.
A dam is considered to be a more sophisticaled barrier than a barrage. A dam is a barrier of concrete built accross a river to create a body of water for a hydroelectric power station or a reservoir of water and is of greater capacity than a barrage. A barrage is an obstruction in a watercourse to increase the depth of water to facilitate irrigation
A dam is a structure built across a river to control the flow of water. It helps regulate water levels, generate hydroelectric power, and provide water for irrigation and drinking. Dams can also prevent floods and create reservoirs for recreational activities.
The Tyne River Tunnel is indeed built partly under water. The lowest spot in the tunnel is 85 feet below the high water mark of the river.
The Thames Barrier is a device that can be raised across the river Thames to prevent London from flooding during particularly high tides.