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Pros and cons of straight channels (rivers)?
you build a straight channel to reduce flooding by carrying the water out of the area more quickly
Natural drainage systems start to meander once a stream channel carries enough water volume for velocity differences in the water outflow to develop. That's why 3rd, 4th, and higher order streams start to meander.. Force = mass x acceleration: Inflow/outflow = vertical cross sectional Area x velocity.
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