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Flashcards in River regimes Deck (9)
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1

What is a river regime?

variability in its discharge throughout the course of a year in response to precipitation, temperature, evapotranspiration and drainage basin characteristics

2

How many are there in the UK?

1,500

3

What do river regimes vary on?

sensitive to climatic variation/land use changes/water abstraction

4

What is a storm hydrograph?

the graph of discharge of a river leading up to and following a storm/rainfall event

5

Why are storm hydrographs important?

they predict how a river might respond to a rainstorm

6

Characteristics of a hydrograph?

-base flow
-peak rainfall
-rising limb
-receding limb
-overland/throughflow
-peak discharge
-lag time

7

Flashy hydrograph?

-short lag time
-high peak discharge
-steep rising & falling limbs

8

Drainage basins that are circular?

lead to flashy hydrographs because each point in the drainage basin is roughly equidistant from the measuring point on a river

9

Drainage basins with steep sides?

flashier hydrographs because water flows more quickly on the steep slopes