About the Book: Evapotranspiration-From Measurements to Agricultural and
Environmental Applications
Evapotranspiration (ET) is the sum of evaporation and plant transpiration from
the Earths land and ocean surface to the atmosphere. Evaporation accounts for
the movement of water to the air from sources such as the soil, canopy
interception, and water bodies. Transpiration consists of the vaporization of
liquid water contained in plant tissues and the vapour removal to the
atmosphere. Crops predominately lose their water through stomata. These are
small openings on the plant leaf through which gases and water vapour pass. The
water, together with some nutrients, is taken up by the roots and transported
through the