Laserfiche WebLink
LE and EF Calculation <br />15 <br />•Using LE the evaporative fraction (EF) is calculated: <br />EF = LE/(Rn – G) <br />•It assumes that this fraction remains constant <br />throughout the day, therefore can be used in <br />determining daily ET as shown below: <br />ET24 = 86,400 * EF * (Rn24 - G24)/ λv <br />•Under calm weather conditions or moderate <br />advection for non-irrigated areas, the assumption of <br />EF being constant can be acceptable. <br /> <br />Evap./Available energy