Water and Carbon:River exe Flashcards

1
Q

location

A

in Devon
source is Exmoor and Mouth is Exmouth
flows through Tiverton and Exeter

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2
Q

maximum and minimum elevation

A

maximum 500m in the north
and minimum 25m towards mouth

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3
Q

geology

A

85% of the catchment area is impermeable rock-mainly sandstone

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4
Q

land use

A

67% of land is agricultural grassland peat bogs and woodland

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5
Q

65%

A

how much run off makes of the water balance

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6
Q

positive human activity

A

Wimbleball resevoir:
built in 1979 and provides water to Exeter and East Devon
Prevents extreme fluctuation of water through the year

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7
Q

negative human impact

A

drainage ditches were dug into peat bogs for farming
this increases water flow and also more carbon dioxide into atmosphere

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8
Q

what was done to rectify negative human impact?

A

Exmoor Mires project-since 1998
aimed to restore peat bogs and block drainage ditches
this will increase infiltartion capacity and more carbon storage

Aims to restore 2000ha

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9
Q

social impacts

A

december 2012-river burst its banks:
25 had to be evacuated due and 30 homes flooded

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