Randomssss Flashcards
1
Q
how does the cross profile of a river change downstream?
A
v shaped valley, u shaped valley’ wide floodplain
2
Q
long profile upper course
A
-rapids + large boulders
-vertical erosion
-v shaped valleys
- fast flowing
3
Q
long profile of middle course
A
- ox-bow lakes
-starts to meander
-u shaped valley - lateral erosion
4
Q
What is flooding?
A
Occurs when the water level rises in a river and overflows onto neighbouring land
5
Q
What is a hydrograph
A
A graph that shows the amount of water in a river at any given time. Also shows discharge
6
Q
Human flood risk causes
A
-Impermeable surfaces
-(city’s, towns, roads)
7
Q
What is hard engineering
A
Using man made structure to prevent or control natural processes from taking place
8
Q
What is soft engineering
A
Doesn’t involve building artificial structure therefore has less impact on the environment
