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A Level Geography- Physical - Water And The Carbon Cycle > The Water Balance > Flashcards

Flashcards in The Water Balance Deck (9)
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1

What is the formula for precipitation?

P = Q + E +/- S
P = precipitation
Q = river run off
E = evapotranspiration
S = storage in soil and rocks

2

What is water surplus?

Where precipitation exceeds evapotranspiration. The soil water store is full and there is excess for plants, groundwater recharge and runoff.

3

What is utilisation?

Evapotranspiration water stores are being used up by plants or lost by evaporation.

4

What is recharge?

Precipitation exceeds evapotranspiration, the soil begins to fill up from infiltration.

5

What is deficit?

All soil moisture has been utilised and plants will either wilt or adapt to survive in dry conditions.

6

When does soil moisture recharge occur?

October through to February.

7

When does soil moisture utilisation happen?

May through to August.

8

When does soil moisture deficit happen?

August and September. (time of droughts)

9

When does soil moisture surplus happen?

February through to May. (time of floods)