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Human disruption to the drainage basin system - Coggle Diagram
Human disruption to the drainage basin system
Abstraction
When water is taken from aquifers at a rate higher then the replacement level. this will cause reduced groundwater flow and a lower water table
In China water irrigates 40% of farmland and provides 70% of drinking water in the north and north-west. Groundwater dropped by 1 metre per year between 1974-2000
Pollution from industry
Building river defences
Cloud seeding
An attempt to change the amount or type of precipitation by dispersing substances into the air that serve as cloud condensation nuclei. new research has made reliable results showing it can be affordable and reliable.
An example of this is in Beijing just before 2008 Olympics games in order to clear the air of pollution
Deforestation
Deforestation is
Global warming
Construction of dams
Building dams increase surface water stores and evaporation. they reduce downstream river flow and discharge
Lake Nasser in Egypt is estimated to lose 10-16 billion cubic metres every year from evaporation
Overpopulation
Farming and irrigation
Urbanisaiton
Buildings can create impermeable surfaces that reduce infiltration and can increase surface run-off as well as throughflow through artificial drains, can create increased river discharge
Has increased risk across the UK including Maidenhead in 2014, York and Manchester in 2015