The Operation of the Hydrological Cycle at a Global Scale
- Created by: belle-madeleine
- Created on: 16-02-18 16:47
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- The Operation of the Hydrological Cycle at a Global Scale
- How Water Cycling Operates?
- Stores
- Reservoirs where water is held
- Oceans
- Reservoirs where water is held
- Fluxes
- Measures the rate of flow between the stores
- Processes
- The physical mechanisms which drive the fluxes of water between the stores
- Stores
- The Global Hydrological Cycle
- Closed system driven by solar energy and gravitational potential energy
- Closed System
- Fixed amount of water
- Constant
- Finite
- No external inputs and outputs
- Fixed amount of water
- Water can exist in different states
- Liquid
- Vapour
- Solid
- Ice Age
- Water held in cyrosphere
- Snow
- Ice
- Less held in the oceans
- Sea levels dropped
- Water held in cyrosphere
- Climate Change
- Loss of ice
- Rises in sea levels
- Human Impact
- Water storage reservoirs
- Increased security of water supplies
- Major Fluxes
- Oceans
- Cyrosphere
- Solid state
- Land
- Rivers
- Streams
- Lakes
- Groundwater
- Atmosphere
- Vapour
- Key Processes
- Precipitation
- Evaporation
- Cryospheric exchange
- Run-off generation
- Residence Times
- Average time a water molecule will spend in that reservoir or store
- Fossil water is not renewable or rechable
- Ice sheets store water for long periods
- Impact on turnover
- Soil moisture, small lakes and rivers have short residence times
- Water stored in soil is spread thinly
- Evaporation
- Transpiration
- Groundwater flow
- Recharge
- Water stored in soil is spread thinly
- Atmospheric water has the shortest residence time
- Evaporates, condenses and becomes precipitation
- Average time a water molecule will spend in that reservoir or store
- Accessible Water for Human Life Support
- 69% of water is in snowflakes, ice sheets, ice caps and glaciers
- 30% is groundwater
- 1% of water is easily accessible to humans
- How Water Cycling Operates?
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