Model (1) |
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General Penman-Monteith model |
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The Required Data |
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Tmax |
Max |
Air Temperature |
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Tmin |
Min |
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Ta |
Average |
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% |
RHmax |
Max |
Relative Humidity |
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% |
RHmin |
Min |
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m/s |
Uz |
Wind Speed |
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m |
zw |
Height Of Wind Measurement Above Ground Surface |
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hour |
n |
Actual Duration Of Sunshine In A Day |
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cm |
hcref |
Crop Height |
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- |
J |
Number Of Day In The Year |
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m |
E |
Elevation |
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LAT |
Latitude |
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MJm-2day-1 |
Rn |
Net Radiation |
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MJm-2day-1 |
Rs |
Solar Or Short Wave Radiation |
Model (2) |
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Standardized ASCE Penman Monteith model |
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The Required Data |
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Tmax |
Max |
Air Temperature |
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Tmin |
Min |
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Ta |
Average |
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% |
RHmax |
Max |
Relative Humidity |
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% |
RHmin |
Min |
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m/s |
Uz |
Wind Speed |
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m |
zw |
Height Of Wind Measurement Above Ground Surface |
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hour |
n |
Actual Duration Of Sunshine In A Day |
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- |
J |
Number Of Day In The Year |
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m |
E |
Elevation |
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LAT |
Latitude |
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MJm-2day-1 |
Rn |
Net Radiation |
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MJm-2day-1 |
Rs |
Solar Or Short Wave Radiation |
Model (3) |
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Original Penman Model |
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The Required Data |
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Tmax |
Max |
Air Temperature |
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Tmin |
Min |
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Ta |
Average |
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% |
RHmax |
Max |
Relative Humidity |
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% |
RHmin |
Min |
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m/s |
Uz |
Wind Speed |
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m |
zw |
Height Of Wind Measurement Above Ground Surface |
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hour |
n |
Actual Duration Of Sunshine In A Day |
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- |
J |
Number Of Day In The Year |
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m |
E |
Elevation |
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LAT |
Latitude |
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MJm-2day-1 |
Rn |
Net Radiation |
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MJm-2day-1 |
Rs |
Solar Or Short Wave Radiation |
Model (4) |
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Kimberly-Penman 1982 |
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The Required Data |
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Tmax |
Max |
Air Temperature |
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Tmin |
Min |
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Ta |
Average |
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% |
RHmax |
Max |
Relative Humidity |
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% |
RHmin |
Min |
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m/s |
Uz |
Wind Speed |
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m |
zw |
Height Of Wind Measurement Above Ground Surface |
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hour |
n |
Actual Duration Of Sunshine In A Day |
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- |
J |
Number Of Day In The Year |
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m |
E |
Elevation |
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LAT |
Latitude |
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MJm-2day-1 |
Rn |
Net Radiation |
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MJm-2day-1 |
Rs |
Solar Or Short Wave Radiation |
Model (5) |
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Jensen-Haise Method |
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The Required Data |
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Tmax |
Max |
Air Temperature |
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Tmin |
Min |
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Ta |
Average |
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- |
J |
Number Of Day In The Year |
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m |
E |
Elevation |
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LAT |
Latitude |
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MJm-2day-1 |
*Rn |
Net Radiation |
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MJm-2day-1 |
Rs |
Solar Or Short Wave Radiation |
Model (6) |
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FAO-56 Penman Monteith Model |
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The Required Data |
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Tmax |
Max |
Air Temperature |
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Tmin |
Min |
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Ta |
Average |
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% |
RHmax |
Max |
Relative Humidity |
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% |
RHmin |
Min |
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m/s |
Uz |
Wind Speed |
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m |
zw |
Height Of Wind Measurement Above Ground Surface |
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hour |
n |
Actual Duration Of Sunshine In A Day |
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- |
J |
Number Of Day In The Year |
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m |
E |
Elevation |
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LAT |
Latitude |
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MJm-2day-1 |
Rn |
Net Radiation |
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MJm-2day-1 |
Rs |
Solar Or Short Wave Radiation |
Model (7) |
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FAO-24 Penman Model |
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The Required Data |
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Tmax |
Max |
Air Temperature |
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Tmin |
Min |
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Ta |
Average |
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% |
RHmax |
Max |
Relative Humidity |
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% |
RHmin |
Min |
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m/s |
Uz |
Wind Speed |
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m |
zw |
Height Of Wind Measurement Above Ground Surface |
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hour |
n |
Actual Duration Of Sunshine In A Day |
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- |
J |
Number Of Day In The Year |
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m |
E |
Elevation |
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LAT |
Latitude |
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MJm-2day-1 |
Rn |
Net Radiation |
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MJm-2day-1 |
Rs |
Solar Or Short Wave Radiation |
Model (8) |
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Turc 1961 Method |
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The Required Data |
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Ta |
Average Air Temperature |
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% |
RHa |
Average Relative Humidity |
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hour |
n |
Actual Duration Of Sunshine In A Day |
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- |
J |
Number Of Day In The Year |
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LAT |
Latitude |
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MJm-2day-1 |
Rs |
Solar Or Short Wave Radiation |
Model (9) |
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FAO Blaney-Criddle Method |
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The Required Data |
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Ta |
Average Air Temperature |
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% |
RHa |
Average Relative Humidity |
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hour |
n |
Actual Duration Of Sunshine In A Day |
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- |
J |
Number Of Day In The Year |
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LAT |
Latitude |
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MJm-2day-1 |
Rs |
Solar Or Short Wave Radiation |
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m/s |
Ud |
Daytime Wind Speed |
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- |
p |
Mean Daily Percent of Annual Daytime Hours |
Model (10) |
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Hargreaves 1985 Model |
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The Required Data |
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Tmax |
Max |
Air Temperature |
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Tmin |
Min |
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Ta |
Average |
Model (11) |
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FAO-24 PAN Evaporation |
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The Required Data |
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% |
RHa |
Average Relative Humidity |
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m/s |
Uz |
Wind Speed |
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m |
zw |
Height Of Wind Measurement Above Ground Surface |
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mm/day |
Epan |
Pan Evaporation |
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m |
Fetch |
Distance Of The Identified Surface Type |