river exe 🤮 Flashcards by jake smith | Brainscape

Q

physical characteristics

A

max elevation : 514m

min elevation : 26m

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Q

geological characteristics

A

84% impermeable rock

rock strata accounts for drainage network

devotion sandstone
shake
slate

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Q

land use percentages

A

67% agriculture

15% woodland

3% peatland

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Q

length

A

82.7km

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Q

source and mouth locations

A

exmoor to exmouth

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Q

drainage basin size

A

15000km2

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Q

water balance

precipitation?

explanation for precipitation?

A

1300 mm

due to prevailing winds of Atlantic and high relief

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Q

wimbleball reservoir

dam made from?

A

local rock with pink tinge to blend with area

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Q

wimbleball reservoir

net storage?

A

21 000 megalitres

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Q

wimbleball reservoir

supplies where with water?

A

exeter and east devon

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Q

wimbleball reservoir

positive impacts

A

less soil erosion

less landslides from saturated soil

cooling effect in summer

less floods

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Q

peatland restoration

NGO?

A

exmoor miles project

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Q

peatland restoration

year?

A

1998

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Q

peatland restoration

how?

A

rewet to slow down runoff

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Q

peatland restoration

positive impacts

A

less floods

less soil erosion

less silt entering river

less surges after storms (down by 1/3)

less suspended particles and dissolved organic carbon (30%)

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