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Fig. 7.7 Hourly reference evapotranspiration comparison between the FAO56 Penman equation
(FAO56-PM ET 0 ) and the standardized CIMIS Penman
Monteith equation (CIMIS-PM ET 0 ) for
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the Brue catchment during the years 1995
1999
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Fig. 7.8 Hourly reference evapotranspiration comparison between the FAO56 Penman equation
(FAO56-PM ET 0 ) and the COPAIS approach empirical equation (ASCE-PM ET 0 ) for the Brue
catchment during the years 1995
1999
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The 5-year mean values of slope, R 2 , and RMSD between CIMIS ET 0 and
FAO56
PM ET 0 are 1.058, 0.99, and 0.0062 mm h 1 , respectively. Even though
the slopes of those plots are higher than a 1:1 ratio, the CIMIS Penman equation
keeps a very good linear relation with the standardized Penman
-
Monteith equa-
tions. In the case of CIMIS-PM, the 5-year mean values of slope, R 2 , and RMSD in
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