human impact on rivers
- Created by: lucy._.hart
- Created on: 22-10-20 11:54
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- human activity modifying hydrological cycle
- preciptation
- cloud seeding
- adding substances in air to change precipitation
- Russia - used to disperse fog at airports
- adding substances in air to change precipitation
- air pollution
- soot from fires, exhaust fumes + chimneys produces warm, rising air increase rainfall 10%
- global warming
- warmer seas = more evaporation = more water vapour = more rainfall
- cloud seeding
- water storage
- dams
- store water in reservoirs for irrigation
- artificial groundwater recharge
- used in S. England as short supply in summer
- pumped into aquifers via boreholes increasing water table
- wells
- dams
- changing the channel
- straightening/dredging
- rate of erosion increases
- flooding decreases because higher velocity
- canalisation
- increase flooding in urban areas because concrete doesn't infiltrate
- straighter, deeper channels = less flooding
- rhine regulation
- straightening/dredging
- transferring between drainage basins
- industrial cities have high demand for water
- Newcastle - reservoir built on river Tyne
- 570 resevoirs in the UK
- industrial cities have high demand for water
- urbanisation
- pollution
- dirt + litter contaminates water
- increased emissions
- less evaporation
- surface permability
- concrete, impermeable, increased surface run off
- pollution
- deforestation + afforestation
- "one million trees for the amazon" located in the Brazil
- deforestation increases discharge so more run off so more flooding
- preciptation
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