Unit 1- RIVER SEVERNE Flashcards
1
Q
Where is the river severne?
A
Mid Wales
cambrian mountains
2
Q
What occurs in the upper catchment?
cuases what landform
A
-More verticle erosion
-More v-shaped valleys
3
Q
Why more verticle eroision in upper catchement?
A
-Hard impermeable rocks
-Roll/traction
-Cuasing lots of abrasion on the bed
4
Q
What occurs in the middle catchment?
where
A
-More lateral erosion
-Meanders
(in Kempsey)
5
Q
What occurs in the lower catchment?
where
A
-Near Tewkesbury
-Lateral erosion + flooding
-Large meanders and leeves
6
Q
Why does river flow faster in lower course?
A
-Bed and bank eroded already
-Wide and deep
-Less friction (as wider and deeper) allows faster water movement
7
Q
Why does lower course flood more?
A
-Wider flood plain
-as it is flatter
-Meaning water can more easily spread out and flood
8
Q
A
