water balance

Question 1

what is water balance

Answer 1

difference between inputs and outputs in the drainage basin

Question 2

positive v negative water balance

Answer 2

precipitation exceeds runoff and evapotranspiration = positive = water stores inc

runoff and evap exceed precipitation = negative= dec stores

Question 3

winter seasonal pattern

Answer 3

high rain
low evap
high storage
high runoff as inc rain and dec evap

surplus

Question 4

summer seasonal patterns

Answer 4

low rain
high evap
low storage
low runoff as low rain and inc evap

defecit

Question 5

what is soil moisture budget

Answer 5

change in vol water stored in soil over yr

Question 6

factors of soil moisture budget

Answer 6

rain
potential evapotranspiration
temp - more evap and air hold more

Question 7

soil moisture recharge

Answer 7

water added to soil by rainfall or potentially irrigation

Question 8

soil moisture utilisation

Answer 8

soil water used by plants

Question 9

soil moisture defecit

Answer 9

little water
plants wilt and die

Question 10

soil moisture surplus

Answer 10

more water available than can be used by plants

Question 11

summer soil moisture budget

Answer 11

plants grow
soil moisture utilisation + defecit
high evap

Question 12

autumn soil moisture

Answer 12

cooling down
plants dying
less evap

Question 13

winter soil moisture budget

Answer 13

soil moisture recharge
plants dormant

Question 14

spring soil moisture budget

Answer 14

surplus