Hydrosphere
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What are the different reservoirs of water in the water cycle
• oceans • lakes • rivers
Define the term residence time
• how long water stays in a particular reservoir
Define the term transfer rate
• how much water moves over a period of time
How do you work out residence time
residence time = volume of H2O in a reservoir/mean transfer rate
What is evaporation
• water moves from the earths surface to the atmosphere
What is precipitation
• water moves from the atmosphere to the ground,ocean,lakes
What is transpiration
• water moves from plants to the atmosphere
What is runoff
• water moves from the land to the ocean
What is interception
• water moves from the atmosphere to the plant
What is infiltration
• water moves from the surface to the soil
What is percolation
• downward movement of water through the soil
What is ground water flow
• water moving slowly through rocks towards the sea
What is transport by the wind
• water moves over the ocean to over the land
What is surface flow
• water flows downhill towards stream channels which join rivers and eventually reach the oceans
Where does the energy come from that drives the water cycle
• the sun
Define the term abstraction
• taking water from a natural reservoir for human use
What effects does urbanization have on the process and reservoir
• reduces infiltration • increase interception
What effect does abstraction of water have on the process and reservoir
• decrease water volume underground
What effect does agriculture have on the process and reservoir
• decrease infiltration • increase transpiration • can increase and decrease interception
What effect does deforestation have on the process and the reservoir
• decrease transpiration • decrease interception • decrease infiltration
What effect does afforestation have on the process and reservoir
• increase transpiration • increase interception • increase infiltration
What effect does industry have on the process and the reservoir
• slows evaporation • more water is being abstracted out of natural reservoirs
What effect does combustion have on the process and reservoir
• increase evaporation • increase precipitation • increase transpiration
What are the 4 types of demand for water
• population size • affluence • agriculture • industry