raised so that more security and don’t prepare for the water can fit into the flood. channel. This means Embankments have high that the river channel maintenance costs and need holds more water repairing a lot! before flooding They sometimes put concrete in occurs. This reduces to line the channel and this can the flood risk. cause animals to lose their habitats! Can be used as a riverside footpath for people Cheaper than other HE methods Can provide habitats for water voles. FLOOD RELIEF CHANNELS A flood relief channel Footpaths and cycle tracks can be is an artificially made built along the new channel. This channel that is means people can bird watch. designed to back up A relief channel protects 3000 the main river channel properties in Exeter for a river that often Some relief channels have floods. It does this so artificial reed beds in them which that urban areas do give animals a habitat. However, not flood. During some relief channels can destroys times of high animal’s habitats. discharge (lots of People who used to live where the water in the river), relief channel is built in Exeter gates open to allow have to move. the excess water to go Settlements downstream of the into the flood relief relief channel can be flooded. channel) to stop flooding. SOFT ENGINEERING: STRATEGY HOW IT WORKS and Floodplain Zoning Where the land is In some cities, building has already used to minimise place on the floodplain. the risk of flooding. There is a housing shortage in the The Environment UK so a restriction on building houses Agency categorises is not helpful land into four Habitats are destroyed due to The most building on other greenfield sites. important buildings Cheap are built in zone 1 Provides space and the least Less flooding due to not building on important buildings floodplain are built in zone 3b. warnings and preparation The Environmental It is a cheap way of protecting Agency have an people and their property. action plan for If people are warned then they can areas that are at keep valuables safe.
raised so that more water can fit into the channel. This means that the river channel holds more water before flooding occurs. This reduces the flood risk. security and don’t prepare for the flood. Embankments have high maintenance costs and need repairing a lot! They sometimes put concrete in to line the channel and this can cause animals to lose their habitats! Can be used as a riverside footpath for people Cheaper than other HE methods Can provide habitats for water voles. FLOOD RELIEF CHANNELS A flood relief channel is an artificially made channel that is designed to back up the main river channel for a river that often floods. It does this so that urban areas do not flood. During times of high discharge (lots of water in the river), gates open to allow the excess water to go into the flood relief channel) to stop flooding. Footpaths and cycle tracks can be built along the new channel. This means people can bird watch. A relief channel protects 3000 properties in Exeter Some relief channels have artificial reed beds in them which give animals a habitat. However, some relief channels can destroys animal’s habitats. People who used to live where the relief channel is built in Exeter have to move. Settlements downstream of the relief channel can be flooded. SOFT ENGINEERING: STRATEGY HOW IT WORKS and Floodplain Zoning Where the land is used to minimise the risk of flooding. The Environment Agency categorises land into four The most important buildings are built in zone 1 and the least important buildings are built in zone 3b. In some cities, building has already place on the floodplain. There is a housing shortage in the UK so a restriction on building houses is not helpful Habitats are destroyed due to building on other greenfield sites. Cheap Provides space Less flooding due to not building on floodplain warnings and preparation The Environmental Agency have an action plan for areas that are at It is a cheap way of protecting people and their property. If people are warned then they can keep valuables safe.
AQA_GCSE_Geography_Paper_1_Revision_Guide_2018(4).docx