水文學 (蒸發散) 國立中興大學土木系 陳榮松 教授 水面蒸發 水面蒸發量之觀測 水面蒸發之估算 減少水面蒸發之方法 土壤蒸發 葉面蒸散 蒸發散量 用水量與水分缺乏量之估算
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(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)
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)
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