river tees case study

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49 Terms

1
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state what geomorphic processes occur in the upper course of the river tees

  • vertical erosion

  • chemical weathering

  • freeze-thaw weathering

  • differential erosion

2
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state what geomorphic processes occur in the middle course of the river tees

  • lateral erosion

  • transporation

3
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state what geomorphic processes occur in the lower course of the river tees

  • lateral erosion

  • deposition

4
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state the geology of the upper course of the river tees

limestone

5
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state the geology of the middle course of the river tees

limestone

6
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state the geology of the lower course of the river tees

  • sandstone

  • alluvium deposits

7
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explain how the resistance of rocks in the upper course of the river tees affects geomorphic processes

  • rocks in the upper course are more resistant

  • this causes vertical erosion

  • as the river erodes the less resistant river bed

  • creating steep-sided valleys

8
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explain how limestone in the upper and middle courses of the river tees affects geomorphic processes

  • limestone is a porous rock type

  • this means there is more water infiltration

  • leading to less surface runoff,

  • no floodplains,

  • an increase in freeze-thaw weathering

  • and chemical weathering

9
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explain how the difference in resistance of rocks in the upper course river tees affects geomorphic processes

  • difference in resistance to erosion in rock types can cause differential erosion

  • where the different rock types erode at varying rates

  • creating waterfalls

  • and gorges

  • which rely on differential erosion to form

10
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explain how the wet and cold climate in the upper course of the river tees affects geomorphic processes

  • means more freeze-thaw weathering

  • which breaks up sharp bits of rock

  • which end up in the river

  • and are used in erosive processes such as abrasion

11
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explain how high rainfall in the mountainous regions of the river tees affects geomorphic processes

  • high rainfall causes higher river discharge

  • this increases the carrying capacity of the river

  • resulting in increased downstream erosion

  • and flooding in the lower course

12
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explain how high rainfall in the upper course of the river tees affects geomorphic processes

  • high rainfall causes mass movements

  • as the land is saturated and heavy

13
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explain how summer warmth in the river tees affects geomorphic processes

  • increases chemical weathering on rocks

  • as it catalyses the reaction between the water and the rocks

14
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state what high force is

a waterfall

15
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state the drop size of high force waterfall

21m

16
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state the geology of high force waterfall

  • harder whin sill caprock

  • softer underlying limestone

17
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explain what the whin sill intrusion at high force waterfall has caused

  • prevented a smooth, concave, long profile

  • created a knickpoint

  • which has created profile in convex at this point

18
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state the features in the upper course of the river tees

  • v-shaped valleys

  • interlocking spurs

  • high force waterfall and gorge

  • rapids

19
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state the features in the middle course of the river tees

  • meanders

  • oxbow lakes

  • meander scars

20
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state the features in the lower course of the river tees

  • meanders

  • oxbow lakes

  • meander scars

  • floodplains

  • levees

  • estuaries

21
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state the number of reservoirs along the river tees

9

22
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state the name of the reservoir in the upper course of the river tees

cow green

23
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explain how cow green reservoir affects geomorphic processes in the river tees

  • halts flow of the river

  • stopping the transportation of material downstream

  • causing sediment to build up in the river

  • decreasing the discharge of the river

  • limiting downstream flooding

  • limiting the creation of alluvium deposit levees in the lower course by deposition

24
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state the name of the meander cut off along the river tees

the mandale loop meander cut off

25
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state the location of the meander cut off along the river tees

stockton

26
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explain what the meander cut off along the river tees is

it shortens the river by 4km

27
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explain how the mandale loop meander cut off affects geomorphic processes in the river tees

  • it reroutes the river to a faster, steeper area of land

  • which prevents flooding on the wider loop

  • limiting the creation of levees by deposition

28
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state when the tees barrage was opened

1995

29
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state the initial cost of the tees barrage

ÂŁ50 million

30
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state the width of the tees barrage

70m

31
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state what the tees barrage is

  • an artificial barrier

  • between the tees estuary

  • and the upstream catchment

32
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explain how the tees barrage affects geomorphic processes

  • prevents tidal flows upstream

  • preventing high tide flooding in the lower course

  • decreasing deposition of alluvium deposits

33
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state the initial cost of the yarm flood defences

ÂŁ2 million

34
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state what the yarm flood defences deals with

1 in 100 year flood events

35
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state what the yarm flood defences consists of

  • earth embankments

  • gabions

  • sea walls

  • flood gates

36
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explain how the earth embankments in the yarm flood defences affects geomorphic processes in the river tees

  • allows higher river discharge before flooding

  • increasing lateral erosion

  • and reducing deposition on floodplains

37
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state how the gabions in the yarm flood defences affects geomorphic processes in the river tees

reduces lateral erosion of river banks

38
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explain how the sea walls and flood gates in the yarm flood defences affects geomorphic processes in the river tees

  • alter the flow of water

  • causing increases or decreases in deposition

  • and transportation

39
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state why dredging along the river tees is a different management strategies to others

  • it is soft management of the river

  • in opposition to hard management

40
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explain how dredging affects geomorphic processes in the river tees

  • increases the capacity of the river

  • which means less flooding downstream

  • decreasing the deposition of alluvium deposits

  • on floodplaisn

41
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state what the planting of trees along the river tees is called

afforestation

42
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state what has been done to combat deforestation along the river tees

  • coniferous forests

  • planted in the upper course

43
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explain how afforestation affects geomorphic processes in the river tees

  • afforestation causes more water to be taken up by vegetation

  • decreasing surface runoff

  • which decreases the eroded material from land ending up in the river

  • it also decreasing the discharge of the river

  • reducing lateral erosion

44
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state the length of the river tees

137km

45
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state the altitude at the source of the river tees

893m above sea level

46
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state the location of the source of the river tees

  • cross fell

  • in the cumbria moorlands

47
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state the annual rainfall at the source of the river tees

2000mm

48
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state the largest settlement along the river tees

middlesborough

49
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state the length of time river processes in the river tees have been shaping the landscape

8-10,000 years