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River environments
Weathering
- Three types: physical (breaking down of rock
- Slumping: river flows at base of
valley-side smaller pieces), biological (roots of plants
slope. Slope = unstable. Heavy rain
material growing in cracks and splitting rocks apart),
saturated heavier + lubricated
slumping chemical (decaying, disintegration, mostly by
-…

Page 3

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Depth Increases
Width Increases
Discharge Increases
Load Size of particles decreases
Gradient Decreases (= shallower)
River processes
- Transportation: movement of load (=material) by the river
- Suspension: process by which lighter material are held by turbulent eddies. Lighter
particles nearest to surface - Solution: carrying of dissolved materials -…

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Page 5

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Interlocking spurs River forced to flow around protruding hillsides. Hillsides =
interlocking spurs
- Deposition: laying down of load due to decreased energy, speed and discharge
(usually when
river enters sea, gradient decreases or during drought). Heaviest load deposited first -
Erosion: wearing away of rock/stones/soil by river/wind/rain/ice
The higher…

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Page 7

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- Formed in fast-moving streams littered with large, hard rock formations water goes
from a
hard rock resisting erosion (more resistant) to a soft rock that's easier to erode (less
resistant) softer rocks erode harder rocks left as incomplete barriers (too small to
form waterfall though) water rushes around rocks,…

Page 8

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Page 9

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Water Definitions - Supply: taking water from lakes/rivers/groundwater to meet demand.
Most of the world's water supply is from ice sheets (77%). Only 3% of the world's supply
is freshwater - Demand/consumption: the need for water - Water balance: comparison
between supply and demand of water in an area
Supplies…

Page 10

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150yrs old in 2008, 217 litres leaking per
property per day - Loss of natural water supplies (75% of ponds and floodplain
grasslands in past 100 years) less
places to tap water from more water must come from abroad - N.B. Domestic = at
home = dishwashers, washing machines, pools…

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Pages in this set

Page 1

Preview of page 1

Page 2

Preview of page 2
River environments
Weathering
- Three types: physical (breaking down of rock
- Slumping: river flows at base of
valley-side smaller pieces), biological (roots of plants
slope. Slope = unstable. Heavy rain
material growing in cracks and splitting rocks apart),
saturated heavier + lubricated
slumping chemical (decaying, disintegration, mostly by
-…

Page 3

Preview of page 3
Depth Increases
Width Increases
Discharge Increases
Load Size of particles decreases
Gradient Decreases (= shallower)
River processes
- Transportation: movement of load (=material) by the river
- Suspension: process by which lighter material are held by turbulent eddies. Lighter
particles nearest to surface - Solution: carrying of dissolved materials -…

Page 4

Preview of page 4

Page 5

Preview of page 5
Interlocking spurs River forced to flow around protruding hillsides. Hillsides =
interlocking spurs
- Deposition: laying down of load due to decreased energy, speed and discharge
(usually when
river enters sea, gradient decreases or during drought). Heaviest load deposited first -
Erosion: wearing away of rock/stones/soil by river/wind/rain/ice
The higher…

Page 6

Preview of page 6

Page 7

Preview of page 7
- Formed in fast-moving streams littered with large, hard rock formations water goes
from a
hard rock resisting erosion (more resistant) to a soft rock that's easier to erode (less
resistant) softer rocks erode harder rocks left as incomplete barriers (too small to
form waterfall though) water rushes around rocks,…

Page 8

Preview of page 8

Page 9

Preview of page 9
Water Definitions - Supply: taking water from lakes/rivers/groundwater to meet demand.
Most of the world's water supply is from ice sheets (77%). Only 3% of the world's supply
is freshwater - Demand/consumption: the need for water - Water balance: comparison
between supply and demand of water in an area
Supplies…

Page 10

Preview of page 10
150yrs old in 2008, 217 litres leaking per
property per day - Loss of natural water supplies (75% of ponds and floodplain
grasslands in past 100 years) less
places to tap water from more water must come from abroad - N.B. Domestic = at
home = dishwashers, washing machines, pools…

Comments

No comments have yet been made