3.2 Use the nomogram for the solution of Penman's equation to predict the daily potential evapotranspiration from a fiel

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3.2 Use the nomogram for the solution of Penman's equation to predict the daily potential evapotranspiration from a fiel

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3.2 Use the nomogram for the solution of Penman's equation to predict the daily potential evapotranspiration from a field crop at latitude 40°N in April, under the following conditions: mean air temperature = 20 °C; mean h = 70 per cent; sky cover = 60 per cent cloud; mean U2 = 2.5 m/s; ratio of potential evapotranspiration to potential evaporation = 0.7. =
t,Q,p)+Eg(t.p.n)+ E,(t,u.n) ya h E, og 4 E, 30 10 -60 10000 00 22 09 -3.0 ao Bo 010 20 70 020 60 0.5 -40 10- -50 50 0.30- OD 30- 20 20 27 20 25 24 0.7- 3.0 -40 040 24 00- 2-40 06- 0.7- -30 050 20 00- 22- 23 -20 05 30 05 222 000- 21- 20 04 0.41 10 FOD vo 20 -10 020 10 0.6 03 10 F0.7 in 18- 00 03- 17 05 02 12- ros -04 0.00 10 04 10- 10 03 15- 15 03 0.1 -02 14 09 02 13 0.0 12- -0.1 0.00 11 11 0.1 E 10- LOO F005 Uz 10 D 1 0.12 0.95 1 5- L001 E 5 co h
AH+ YED-E,(t,p) E Εα Δ: γ Р Р t E, р PE Q 10 10 UU Foe -00- or 201 20 .35 -70 09 28 IN Food -50- 00 -45- 00 OD -- 37 20 25 24 25 22 21 - 20 .40- - 9.00 0.7 -35- IT- 07- -4.0 700- 93- R 21 20- 19 18- 17- 16 11 14 13- 12- 06- 18 17 10- -25- -30 05 11 14 0.0- -CI 20 10 11 - 10 0- 0.4- 11 -20 -10 -1.5 10- 0- 0.5- 7 D -13- 11 7 100 0.4- -09 -0 H10 Ro 10 -01 -0.9 F0.8 -06 100- -2- CO -0.7 -05 0.15 .00 -04 SO- 04 03 0.2- E 00 р CO- $11 1 It ١ من ١ Los L. 01- P 1121
Rijkoort Nomogram for the calculation of evaporation according to Penman's Equation E: 4H:%E4-E, (t.p)-E,(t,0,p)-E,(t.p.n)=E(t,uz.n) --- Titi: 1 al 12 9 as. 40 * 2 04 1 00 It - a 1 3 aos 11 E
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