Question of result

[yang666-888]

I used the model and got a result of et, but why the et's value is so small (3.8578*10^-7), other value is normal like h, g0, rn, is the problem that my undestand is wrong?

[jvdkwast]

ET is not LE. ET is in mm and an instantaneous amount. You need to integrate this to hourly or daily values for example. Often the evaporative fraction is assumed to be constant and used to integrate ET over 24 hours.

[yang666-888]

Thank you for your answer Dear Sir, looks like I need to caculate daily et by the following formula, so the rn and g0 also is instaneous , the daily rn and g0 needed to be caculated at first right?