RIVER REGIMES AND HYDROGRAPHS Flashcards
1
Q
River discharge
A
Volume of water carried by a river at any given point at any given time (cumecs)
2
Q
River regime
A
variations in river discharge over a period of time shown on a graph
3
Q
Hydrograph
A
Diagram which shows how rainfall affects the discharge of a river over a period of time
4
Q
Peak discharge
A
Max recorded discharge after rain at a given point on a river
5
Q
Peak rainfall
A
Max rainfall
6
Q
Lag time
A
Difference between peak rainfall and peak discharge
7
Q
Rising limb
A
Storm hydrograph part where discharge is increasing towards peak discharge
8
Q
Falling limb
A
Reduction in discharge after peak discharge - returning to base flow
9
Q
Base flow
A
Normal discharge of river
10
Q
Storm flow
A
Additional discharge due to rainstorm
11
Q
Factors affecting river regimes
A
- Intensity of precipitation
- Temperature
- Relief
- Rock type
- Vegetation + land use
- Use of river
- Drainage density
