Boscastle Flashcards
1
Q
When
A
16th August 2004
2
Q
Where
A
England - Boscastle
3
Q
How much income from tourism
A
90%
4
Q
Why boscastle flooded
A
200mm of rain in 4 hours
Soils already soggy (saturated)
High spring tide - water couldnt drain back to sea.
5
Q
Small drainage basin
A
Physical + run off and throughflow reach channel quickly.
6
Q
Steep valley sided
A
Physical + surface run off travels quickly
7
Q
R. Jordan passes through 100m culvert
A
Can’t cope with high discharge
8
Q
Boscastle @ confluence of Jordan and valency
A
Large volume of water collects quickly
9
Q
Building n a flood plain
A
Water can’t infiltrate - impermeable surfaces + human
10
Q
Bridges + culverts
A
Human + narrow river channel
11
Q
Low drainage density
A
Physical + not enough channels to carry out water
12
Q
Clearing vegetation (deforestation)
A
Water isn’t intercepted - human
