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Channelisation can lead to several disadvantages, including increased erosion and sedimentation downstream, as the natural flow of water is altered. It can disrupt local ecosystems, affecting habitats for wildlife and plant species. Additionally, channelisation may increase flood risks in certain areas due to the faster flow of water, as well as reduce the aesthetic and recreational value of waterways. Finally, it can also lead to water quality issues, as pollutants can concentrate in faster-moving water.
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What are the advantages and disadvantages of channelisation?
Disadvantages-Although the river is shorter and he water will flow quicker there is a lower area so the river can still overflow.-Where water flows faster it stops erosion so if there is an increase in water the river will not be able to get bigger and consequently will flood. It also means no drainage can enter the river causing floods in other places.-It is expensive.-Can disrupt natural habitats.-Once a river is channelised its very difficult to repair or get it back to its original state if does not work.
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