GEOGRAPHY water world
- Created by: willbrewin1
- Created on: 13-04-15 13:40
View mindmap
- Water world
- Hydrological cycle
- Movement of water through the hydrosphere
- water enters the atmosphere through evapo- transpiration
- Water particles released from plants or water storages eg oceans
- precipitation- atmosphere to biosphere then either absorbed by vegitation, flows as surface run-off or infiltrates.
- infiltrates from surface into soil
- moves through soil as throughflow or percolates into hard rock underneath
- it is either stored in groundwater storage or flows as groundwater flow
- Unreliable supplies
- SAHEL (Africa) - developing
- short wet season- high run off, little stored
- Weather cycles- several draught years lead to food shortages and famine
- SOUTH WEST USA- developed
- arid area, Colorado river is main supply
- irrigation and water for homes and growing cities (las vegas)
- Climate change and growing populations mean river is drying out
- arid area, Colorado river is main supply
- SAHEL (Africa) - developing
- THREATS to the hydrological cycle
- Humans- waste, chemical factories plant fertilisers (irrigation)
- Water management
- Large scale (DAMS)
- Colorado river- developed
- Series of dams and canals
- Advantages- regulates water supply (less draught and flood), supplies to growing cities, HEP is generated.
- Costs- loss of land, sediment behind dams = HEP efficiency drops, COSTS a lot, less water down stream and wildlife interupted
- Series of dams and canals
- Three gorges dam, China- developing
- worlds largest dam
- Advantages- regulates supply, irrigates the land, HEP to cities, easier to navigate and fish
- Costs- loss of farmland, historical sites, villages lost and homes destroyed, land is weaker (landslides), COSTS a lot, sediment behind dam means HEP less efficient, locals cat afford the HEP
- worlds largest dam
- Colorado river- developed
- Small scale/ intermediate- more sustainable
- NGO's work with locals
- wells- dug to reach underground supplies- can be contaminated
- Hand pump- uses pressure to bring up water from underground stores
- Rain barrels- guttering on houses feed rainwater into a barrel to be used at a later date
- Large scale (DAMS)
- Hydrological cycle
Comments
No comments have yet been made