Why some rivers are "flashy" & others are slow to respond Flashcards Preview

GCSE Geography AQA A Water on the Land > Why some rivers are "flashy" & others are slow to respond > Flashcards

Flashcards in Why some rivers are "flashy" & others are slow to respond Deck (2)
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1
Q

When a river floods this measured by a hydrograph.

A flashy river is one that floods quickly. Why?

A
  1. Little vegetation
  2. Steep valley sides
  3. Intensive rainfall
  4. Saturated soils
  5. Urban land use
    See if you can name three other factors (page 109 in textbook)
2
Q

A river that has is slow to respond has a long lag time.

What is the lag time?

A

The time it takes for peak rainfall to peak discharge (in other words from when it rains till the river is at maximum)