(Evaporation)
Dalton(1802) ( )





−−−++=∴ ()








(p.166)

(Transpiration)

→ → → →

QH
QE
12hr30 (F) USA
P.1755-10P.1765-2
0EfET ⋅=
Deardorff(1978)
For a given month min. precipitation requiement(=) P
=0.014(t-10)(P/E)0.9 t:
Mo J F M A M J J A S O N D
P/E 1.0 1.8 3.2 4.4 5.8 6.0 6.8 6.1 4.6 3.5 2.3 1.5




2~4
6~10
1 2 3 4 5 6 7 8 9 10 11 12(month)
(mm/month)