A wall placed in an open channel to measure water flow is called a "weir." Weirs are often designed to create a controlled overflow of water, allowing for the measurement of flow rate based on the height of the water above the weir. They are commonly used in hydrology and water resource management to monitor streamflow and maintain water levels.
sonometer
A substance that produces hydronium ions when placed in water is called an acid.
displacement
The "Main Channel".
The English Channel and it has the channel tunnel running underneath it.
A cross channel ferry is a ferry that carries passengers across a water body called a channel. A channel is a water body that connects two seas. The channel must be deep enough to be navigable.
A device called a wave staff or stilling well is often used to measure vertical wave height. This instrument consists of a tube or pole placed vertically in the water, with markings to indicate water level fluctuations. Pressure sensors can also be used to measure water pressure changes, which can be related to wave height.
Measure of a river's channel efficiency (its ability to move water and sediment)
canal
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A narrow passage of water usually wider than a strait is called a channel. Channels often connect larger bodies of water and can be used for navigation.