human factors affecting discharge Flashcards
1
Q
what 4 human factors affect discharge
A
- deforestation
- urbanisation
- soft engineering
- agriculture
2
Q
how does deforestation affect
A
- interception rates reduced as rain hits direct
- lack of roots, less infiltration rates and rapid overland flow
3
Q
how does agriculture affect
A
- ploughing breaks topsoil, greater infiltration
- countour ploughing= burrows direct to the river
4
Q
how does urbanisation affect
A
- large impearmeable surfaces
- urban growth is the expanisaation of impermeable surfaves
5
Q
how does soft engineering affect
A
attempts to reduce the flashiness
