They have been used in agriculture to prevent the flooding of crops, and these drainage channels are also used in cities to allow water to run off the street. If you have ever been able to walk around work city during or after a heavy rain, you have drainage channels to thank for that.
They really just give excess water a place to go, either by bringing it via a flume type series of ramps to a place where it can be kept or by letting it into some type of underground sewage system, either way, it allows the water to move freely and of its own volition. You can get the services of drainage design through https://pacificcoastcivil.com/.
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Channel drainage success comes from just how effective it is. Once it is in place, there really isn't much left to do but wait and let the water drain. It requires no power and has been around for centuries, and in most cases, it doesn't even need to be cleaned unless it gets clogged up with debris.
The speed at which the water moves and the way that a drainage channel is shaped make for pretty violent turbulence as the water heads down the channel.
Not only has channel drainage been used for centuries, but it has been used for centuries with great effects. It closely mimics nature which is what makes it so popular and so high functioning. It allows for the natural course of events to take place, with just a little help.
It has been used in countless different scenarios and with countless positive results throughout the years and it only continues to be improved upon as we speak, who knows what the future will hold.