Standardization of Reference Evapotranspiration
Evapotranspiration represents the loss of water from the earth’s surface through the combined processes of evaporation (from soil and plant surfaces) and plant transpiration (i.e. internal evaporation). Reference evapotranspiration is the rate at which readily available soil water is vaporized from vegetated surfaces.
The following is a link to a video presentation entitled: "History, intent and structure of reference ET standardization and its role in ET models" given by R. G. Allen at the American Society of Agronomy Annual Meeting on Nov. 10, 2020.
The Environmental and Water Resources Institute (EWRI) of the American Society of