Detailed Weather Data for Project: EUFA

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 37.80 2.48 44.69 5.00 05Dec2017 9 a.m. 38.03 2.35 43.16 32.00 05Dec2017 10 a.m. 38.25 3.10 40.05 102.00 05Dec2017 11 a.m. 38.35 2.81 39.01 99.00 05Dec2017 12 p.m. 38.89 3.20 35.90 115.00 05Dec2017 1 p.m. 41.09 2.41 31.93 296.00 05Dec2017 2 p.m. 41.97 2.65 28.27 350.00 05Dec2017 3 p.m. 43.09 2.23 28.09 201.00 05Dec2017 4 p.m. 43.41 0.78 29.37 191.00 05Dec2017 5 p.m. 42.53 1.19 33.09 54.00 05Dec2017 6 p.m. 41.97 1.11 32.48 1.00 05Dec2017 7 p.m. 49.57 1.38 38.71 0.00 05Dec2017 8 p.m. 39.24 1.20 57.94 0.00 05Dec2017 9 p.m. 37.80 1.44 56.29 0.00 05Dec2017 10 p.m. 38.68 0.58 54.88 0.00 05Dec2017 11 p.m. 38.68 0.96 51.65 0.00 06Dec2017 12 a.m. 40.44 2.87 49.02 0.00 06Dec2017 1 a.m. 38.25 2.77 50.49 0.00 06Dec2017 2 a.m. 38.03 1.06 58.91 0.00 06Dec2017 3 a.m. 43.09 2.99 49.88 0.00 06Dec2017 4 a.m. 42.08 2.67 48.60 0.00 06Dec2017 5 a.m. 40.57 5.39 47.14 0.00 06Dec2017 6 a.m. 37.69 0.81 47.68 0.00 06Dec2017 7 a.m. 36.48 1.47 55.74 0.00 Accuml. Values 965.96 49.90 1052.97 1446.00 Num. Valid Values 24 24 24 24 Avg. Values 40.25 2.08 43.87 60.25 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.58 80.29 43.87 124.33 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5613 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.7524 definition: TdC = TAIR_avg - ((14.55 + (0.114*TAIR_avg))*xcompl +pow((2.5 + 0.007*TAIR_avg)*xcompl, 3) + (15.9 +0.117*TAIR_avg)*pow(xcompl, 14)) del_lambda1 = 0.4742 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5258 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.1471 definition: Qn = 0.00714*SRAD_avg + 0.00000526*SRAD_avg*pow(TAIR_avg+17.8, 1.87) +0.00000394*pow(SRAD_avg, 2) - 0.00000000239*pow(SRAD_avg, 2)*pow(TAIR_avg-7.2, 2) - 1.02 es_ea = 4.8093 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.6004 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.057 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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