Question

4. For June and annually, what is the percent difference between almond evapotranspiration at Fair Oaks and evaporation at Folsom Lake assuming a pan coefficient of 0.7 and based on the data below? All values below, except for ke are in inches. Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Reference 1.12 1.77 3.28 4.49 6.42 7.44 7.38 7.03 5.13 3.32 1.58 1.07 50.03 Evapo- transpiration k (almonds) 0 0 0.20 0.67 0.95 1.09 1.15 1.171.12 0.85 0 Pan 0.92 1.90 3.47 5.21 8.07 9.91 11.12 9.93 7.45 4.89 2.06 1.25 66.18 Evaporation For Fair Oaks, CA from CIMIS "For Folsom Dam from Western Regional Climate Center

Answer 1

Answer:

-) Pan coefficient is 0.7 - ETC =kCETO hore, ETO - Gop evapotranspis in houth Top evapotranspiration Kc = Copcefficient, Lake evaporation = Cp x Pan evaporation. for Jure ETC = 1.09 7.48 (ETC)= 8-1096. inclass Imouth. June Annual, G = 50.03 Kc = Average of almonds' 0 +0+ 0.27 0.67 +0.95+1.09+1.1571.177 1-12 +0.85+ oto - In keo Kc = 0.6 ETO = 0.6x50-03 ETO = 30.018 in Iyear

(ET) June ; Lake evapotranspiration = Cpx Pan ETO -0,7 8,1096. = 5.6767 in (EC) Annuas, Lake evapotranspiration = 0.7* 30.018 - 21-012 in - Difference between Anneal cand June, - 21.012-5.6767. = 15.33 in. 15-33 Percentage of differences 21.012 x 100 = 07295x100 - 72.95%