Detailed Weather Data for Project: JOHN

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 43.41 16.50 67.35 92.80 03Mar2018 9 a.m. 47.25 20.10 61.92 314.50 03Mar2018 10 a.m. 51.78 19.90 56.58 514.80 03Mar2018 11 a.m. 56.57 20.40 50.63 666.70 03Mar2018 12 p.m. 60.30 20.20 47.12 758.00 03Mar2018 1 p.m. 63.52 20.60 45.22 789.70 03Mar2018 2 p.m. 66.18 20.90 43.96 749.30 03Mar2018 3 p.m. 67.05 21.50 43.41 650.90 03Mar2018 4 p.m. 66.97 22.30 43.73 490.60 03Mar2018 5 p.m. 66.45 23.80 45.05 295.60 03Mar2018 6 p.m. 65.64 20.40 46.16 104.30 03Mar2018 7 p.m. 56.05 23.20 69.20 0.00 03Mar2018 8 p.m. 60.73 16.00 52.75 0.00 03Mar2018 9 p.m. 58.95 17.70 56.41 0.00 03Mar2018 10 p.m. 56.73 16.00 60.40 0.00 03Mar2018 11 p.m. 55.36 15.20 61.18 0.00 04Mar2018 12 a.m. 56.07 19.00 53.35 0.00 04Mar2018 1 a.m. 54.39 17.90 51.84 0.00 04Mar2018 2 a.m. 52.57 15.90 54.61 0.00 04Mar2018 3 a.m. 50.20 12.40 58.53 0.00 04Mar2018 4 a.m. 45.88 10.70 72.79 0.00 04Mar2018 5 a.m. 45.10 11.30 72.22 0.00 04Mar2018 6 a.m. 44.53 10.40 69.38 0.00 04Mar2018 7 a.m. 44.02 11.40 70.68 0.00 Accuml. Values 1335.70 423.70 1354.47 5427.20 Num. Valid Values 24 24 24 24 Avg. Values 55.65 17.65 56.44 226.13 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.14 681.73 56.44 466.63 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4356 definition: xcompl = 1 - (RELH_avg/100) TdC = 4.7102 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 = 0.5996 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4004 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.6553 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 = 6.5752 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 12.5729 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.308 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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