Rivr Flood Defences Flashcards
1
Q
An advantage and disadvantage if a flood wall
A
A - increases the rivers capacity
D - distributes water quickly and can increase flood risk downstream
2
Q
An advantage and disadvantage of construct levees
A
A - increase river capacity
D - water can rise over the levees
3
Q
An advantage and disadvantage of dredging
A
A - increases channel capacity and speeds up river flow
D - speeding up flow increases flood risk downstream
4
Q
An advantage and disadvantage of flood relief channels
A
A - creates extra channels to divert access away from cities
D - protects built up areas but could flood elsewhere
