Evapotranspiration
Evapotranspiration is the sum of evaporation and plant transpiration. Potential evapotranspiration is the amount of water that could be evaporated or transpired at a given temperature and humidity, if there was plenty of water available. Actual evapotranspiration can not be any greater than precipitation, and will usually be less because some water will run off in rivers and flow to the oceans. If potential evapotranspiration is greater than actual precipitation, then soils are extremely dry during at least a major part of the year.
The potential evapotranspiration can be graphed during the year, it follows an approximate bell shape around the seasons.
Referenced By
Evaporation | Evaporator | Transpiration | Vaporization | Vaporize
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