Channel straightening Flooding may happen downstream instead as flood water is carried there faster. Diversion spillways An increase in discharge when the diverted water joins another river (or rejoins the same one) could cause flooding below that point. More erosion occurs downstream because the river flows faster Altering river channels disturbs wildlife habitats It takes less time to navigate the river because it has been made shorter Meanders are removed by building artificial cut- throughs.

Think back to New Orleans They allow the floodplain to be built upon Levees are embankments built along rivers.
If spillways are overwhelmed water will flood areas not used to flooding which could cause even bigger problems These are channels that take water elsewhere if the water level in the river is too high. It can also cause increased river erosion downstream as there is less sediment being deposited.

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