Brock Vs Exe

Question 1

Catchment (Brock)

Answer 1

Lancashire

Question 2

Source and point of confluence (Brock)

Answer 2

Fair Snape - river Wyre (micheals on wyre)

Question 3

length of river (Brock)

Answer 3

17.8km

Question 4

physical features in the North (Brock)

Answer 4

peat bogs on highmoore
millstone hills
steep sided valleys

Question 5

physical factors in South (Brock)

Answer 5

limestone
boulder clay
flatter land

Question 6

name of the agricultural college (Brock)

Answer 6

Myerscough

Question 7

how much water is the agricultural college licensed to extract? (Brock)

Answer 7

45.45 m2

Question 8

what factors contribute to the high flood risk? (Brock)

Answer 8

steep sided valley (N)

flatter in the south

Question 9

typical water levels (Brock)

Answer 9

0.12m - 0.95m

Question 10

highest recorded water levels (Brock)

Answer 10

4.29m

Question 11

flood protection N of St Michael’s (Brock)

Answer 11

flood storage - 1/50 yr flood

Question 12

flood protection before brock meets wyre

Answer 12

strengthened embankment

Question 13

what frequency floods are there warnings for? (Brock)

Answer 13

1/5 yr floods

Question 14

how many sandbags did the council have available?(Brock)

Answer 14

2000

Question 15

what frequency of flood are there warnings for in the low value land, South of St Micheal’s? (Brock)

Answer 15

1/100 yr flood

Question 16

catchment (Exe)

Answer 16

Devon catchment

Question 17

source and mouth (Exe)

Answer 17

hills of Exmoor to Exeter

Question 18

length of the river (Exe)

Answer 18

82.7km

Question 19

what is the name of the resevoir built in 1979? (Exe)

Answer 19

Wimbleball resevoir

Question 20

where was the wimbleball resevoir built?

and what is its purpose? (Exe)

Answer 20

built within the river Haddeo (exe tributary)

regulates flows and storage

Question 21

what are the advantages of peatland? (Exe)

Answer 21

increases water storage: reducing floods
increases water quality: reduces sediment in rivers
increases carbon storage: absorbs co2 unless its dry

Question 22

what is the water balance equation? (Exe)

Answer 22

Precipitation - Evaporation +/- water stored + runoff

Question 23

how have people attempted to restore the peatlands? (Exe)

Answer 23

mires project = block the drainage ditches which were causing the land to dry out.

Question 24

what % of the water balance is runoff? (Exe)

Answer 24

65%

Question 25

what causes the high surface run off in the the Devon catchment? (Exe)

Answer 25

84.4% impermeable soil and highly saturated soil due to high rainfall

Question 26

how large is the drainage basin? (Exe)

Answer 26

601km2

Question 27

what is the elevation in the North and in the South? (Exe)

Answer 27

514m (N)

25m (S)

Question 28

what is the % of impermeable Devonian sandstone? (Exe)

Answer 28

84.4%