Orographic (moisture is lifted over a mountain and the cloud cools/relief rain), Frontal (warm tropical air meets cold polar air, UK) and Convectional (land warms up, heating air above causing clouds to rise and cool).
1 of 14
Name some flows with in the drainage basin.
Interception, infiltration, through flow (water through soil towards rivers), percolation (water through soil to ground stores), direct surface run off and saturated overland flow.
2 of 14
Name 3 outputs of the drainage basin.
Evaporation, transpiration (water carried through plants changes to vapour and is released) and channel flow (human made pipes)
3 of 14
What physical factors affect the drainage basin?
Climate, geology, vegetation and soils.
4 of 14
How does geology affect the drainage basin?
Metamorphic rocks cause direct surface runoff as they are not porous. Some sedimentary rocks are porous but some are impermeable.
5 of 14
How does the climate contribute to the drainage basin?
The hotter the climate, higher levels of evaporation. Seasonality causes increased precipitation in winter.
6 of 14
What human impacts disrupt the drainage basin?
Irrigation, deforestation, weirs, dams, urbanisation, quarries etc.
7 of 14
How does the shape of a drainage basin affect its storm hydrography?
A circular basin will have a rapid drainage.
8 of 14
How does the size of a drainage basin affect its storm hydrography?
The smaller the basin, the less time it takes for water to drain out the river, reducing lag time.
9 of 14
How does the density of a drainage basin affect its storm hydrography?
The higher the density of the river, the greater risk of flooding.
10 of 14
How does the relief of a drainage basin affect its storm hydrography?
The steeper the basin, the quicker water reaches the river.
11 of 14
Explain La Nina.
An intensification of the Walkers Cell where warm sea currents travel from South America to Australia, creating large clouds which rise and cool, causing high levels of rainfall. The clouds then dry and travel back.
12 of 14
How is the Australian drought caused?
Due to El Nino (reverse of the Walkers Cell).
13 of 14
Give some reasons for water insecurity.
Increasing populations, improving living standards, increased agriculture consumption and industrialisation.
14 of 14
Other cards in this set
Card 2
Front
Name some flows with in the drainage basin.
Back
Interception, infiltration, through flow (water through soil towards rivers), percolation (water through soil to ground stores), direct surface run off and saturated overland flow.
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