River Landscapes In The Uk Flashcards

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1
Q

What is a drainage basin

A

The area of land drained by a river

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2
Q

Drainage basin are …… systems and have both …. And ….

A

Open system
Inputs and outputs

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3
Q

How does water enter the drainage basin

A

Precipitation ( rain, hail, sleet, snow)

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4
Q

How does water leave the drainage basin

A

Rivers flowing out to sea

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5
Q

Catchment area

A

Area within the drainage basin

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6
Q

Watershed

A

Edge of highland surrounding a drainage basin

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7
Q

Source

A

Start of a river

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8
Q

Confluence

A

The point where to rivers/ streams join

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9
Q

Tributary

A

A smaller river/ stream joining a larger stream/ river

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10
Q

Mouth

A

End of river/ point where it meets the sea

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11
Q

Infiltration

A

Water soaking into the soil

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12
Q

River channel flow

A

The water movement (speed/ velocity) in a river

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13
Q

Precipitation

A

Rainfall/ sleet/ snow/ hail

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14
Q

Transpiration

A

Where plants and trees release moisture to cool down

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15
Q

Soil moisture

A

A store of water in the soil

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16
Q

Percolation

A

Water soaking into the rocks

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17
Q

Ground water flow

A

Water moving through rocks towards a river

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18
Q

Surface storage

A

Where water is stored as lakes, ditches, puddles

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19
Q

Through flow

A

Water flowing through the soil towards a river

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20
Q

Ground water store

A

Where water is stored in porous rocks underground

21
Q

Interception

A

Where trees block raindrops slowing them down before they reach the surface

22
Q

Surface runoff

A

Overland flooding

23
Q

Vertical erosion

A

Erosion of the river bed

24
Q

Lateral erosion

A

Erosion of the river banks

25
Q

Hydraulic action

A

Sheer force causing bed/ banks to erode

26
Q

Abrasion

A

Material by river scraping along the bed and banks

27
Q

Attrition

A

Eroded material carried by river river hitting into each other and breaking into smaller pieces

28
Q

Solution

A

Acids in the water causing erosion

29
Q

River load

A

Material river is carrying

30
Q

Low flow

A

River water levels are low( dry periods)

31
Q

Transportation

A

Movement of material by the river

32
Q

Traction

A

Dragging large boulders along the river bed

33
Q

Saltation

A

Small pebbles and rocks are bounced along river bed

34
Q

Suspension

A

Fine, light particles carried in flow of river

35
Q

Solution

A

Minerals dissolved in river

36
Q

Deposition

A

River dropping material it’s carrying

37
Q

When will a river deposit its load and in what course of the river

A

When it looses energy
Upper course

38
Q

Where might smaller material be deposited

A

Lower course

39
Q

Formation of v- shaped valley and interlocking spur

A
  1. River transports its load
    2.abrasion creates steep sided banks
  2. Banks are unsupported
  3. Banks collapse ( v- shaped valley formed)
  4. If there are areas of harder rock, river will bend around it. (Interlocking spur)
40
Q

Formation of waterfall & gorges

A

Layer of harder rock lays on top of softer rock…
1. Softer begins to erode creating a steep river bed
2. Rock continues to erode and steep drop is created ( waterfall)
3.erosion at the base of the waterfall leads to the beginning of a plunge pool
4. The rocks continue to collapse, deepening the plunge pool below
5. Waterfall retreats leaving a gorge behind

41
Q

What is a meander and what course of the river is it found

A

Bend in a river
Middle or lower course

42
Q

What is an oxbow lake

A

When a meander connects its bends causing the river to redirect leaving an abandoned horseshoe shaped body of water

43
Q

What is a floodplain

A

A large area of flat land that is prone to flooding

44
Q

What is a levee

A

Naturally raised river banks found on either side of a river channel made of gravel and stone

45
Q

What causes flooding

A

Precipitation (rainfall,snow,hail)
Geology (impermeable rocks speed up water flow )
Steep slopes(transfer water quickly)
Sudden snow melt
Urbanisation ( impermeable surface)
Deforestation (no interception)
Agriculture

46
Q

Hydrograph

A

Make one later

47
Q

Hard engineering examples

A

Dams
Channel straightening
Raised embankments
Flood relief channels

48
Q

Soft engineering examples

A

Planting trees
Wetlands & flood storage area
Floodplain zoning
River restoration
Flood warnings & preparation