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physical geography (year 13) > water balance > Flashcards

Flashcards in water balance Deck (13)
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1
Q

what is the water balance?

A

within a drainage basin, it is the balance between inputs and outputs

2
Q

where does the water balance occur?

A

within a drainage basin

3
Q

when do rivers only occur/

A

if the stores are able to release water, there is direct precipitation or there is overland flow

4
Q

how are larger rivers fed?

A

by smaller tributary streams

5
Q

what is the river regime?

A

discharge levels rise and fall showing an annual pattern

6
Q

what is the annual pattern in which discharge levels rise and fall?

A

rivers regime

7
Q

what formulation can be used to show the water balance?

A

precipitation = discharge + evapotranspiration

+/- changes in storage

8
Q

what is evapotranspiration closely related to?

A

prevailing temperature

9
Q

what is potential evapotranspiration?

A

the amount of water that could be evaporated or transpired from an area if there was sufficient water available

10
Q

if all soil has been filled water is in what?

A

surplus

11
Q

who is deficit of water caused?

A

evapotranspiration is higher than precipitation

12
Q

what is recharge?

A

when precipitation is greater than evapotranspiration

13
Q

why do soil moisture graphs vary?

A

depending on climate