evapotranspiration (missed 1 before)

Question 1

evapotranspiration

Answer 1

the mechanism of returning water back to the atmosphere both by direct evaporation and via transpiration, after it passes through plants.

Question 2

transpiration

Answer 2

plants converting liquid water to vapour

Question 3

how to total evapotranspiration

Answer 3

evaporator height= evaporator from vegetation surface(interception) + evaporate from soil(transpiration) + evaporated from bare soil + evaporated from open water.

Question 4

Potential ET

Answer 4

A measure of the ability of the atmosphere to remove water from the surface through the processes of evaporation and transpiration assuming no control on water supply.

Question 5

what factors effect evaporation

Answer 5

solar radiation
wind (adds drier air above)
relative humidity
temperature.

Question 6

catchment water balance equation (needed for exam)

Answer 6

Evapotranspiration = gross rainfall - (surface flow + groundwater flow) +/- change in storage in soil.

all values in mm

Question 7

osmosis (how transpiration takes place)

Answer 7

the movement of water molecules from an area of high concentration to an area of low concentration.

Question 8

roughly what % of atmospheric moisture is released by plants via transpiration

Answer 8

10%

Question 9

Lysimeter

Answer 9

measure the amount of actual ET released by plants.

Question 10

ET – Eddy covariance

Answer 10

Measurement of vertical transfer of water vapor driven by convective motion.