RIVER REGIMES AND HYDROGRAPHS Flashcards Preview

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Flashcards in RIVER REGIMES AND HYDROGRAPHS Deck (11)
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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