Transpiration is the process of giving off vapor through the pore of the skin or the stomata of plant tissues, while evaporation is the process of changing liquid water to a vapor. Evaporation and transpiration are both related to wind speeds and temperature. As wind and temperature increase, both evaporation and transpiration will also increase. A map of mean annual precipitation minus potential evapotranspiration ration has been included in this teaching strategy. The map shows that negative values exist in the west, while positive values exist in the east.
Precipitation equals potential evapotranspiration in central Kansas.
Kansas Water Office. 1993 Kansas municipalities water use . Environment and man in Kansas . Regents Press of Kansas. 1993 Kansas Mucicipalities Water Use, Kansas Water Office 1994.