tone and parret Flashcards
where abouts in england
se england
sommer set levels
when did it hapen
winter/jan 2013-14
1st physical cause
prolonged rainfall
describe 1st cause physical
jan 2014, 207 mm rainfall
200% higher than average
explain physical cause 1st
prolonged rainfall leads to saturated grounds
increase surface runoff
less infiltration
more water in channel
2nd physical cause
low lying ground
describe 2nd physical
sommer set levels lie 3-5m above sea levels
explain 2nd physical
normally river would drain bristol channel
due to high tide and storm surges
river backed up
flooded into floodplain
1st human cause
lack of dredging
describe 1st human cause
environmental agency decided to stop dredging the river
explain 1st human cause
dredging takes material from bed and banks of river so therefore more water
but not dredging it cant hold as much so it overflows
2nd human cause
change in farming
describe 2nd human cause
grasses to maize
explain 2nd human cause
more intensive means less able to maintain water
less infiltration
more surface run off