Detailed Weather Data for Project: JOHN

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 44.80 31.00 89.89 17.40 05Mar2018 9 a.m. 44.38 30.40 82.15 321.60 05Mar2018 10 a.m. 45.54 33.30 66.89 551.20 05Mar2018 11 a.m. 45.73 36.00 60.21 697.80 05Mar2018 12 p.m. 46.74 33.30 59.53 813.50 05Mar2018 1 p.m. 48.24 32.70 50.22 854.70 05Mar2018 2 p.m. 49.84 29.60 41.31 820.50 05Mar2018 3 p.m. 51.76 29.40 33.06 712.80 05Mar2018 4 p.m. 52.27 34.90 29.41 545.70 05Mar2018 5 p.m. 52.36 34.90 29.13 331.70 05Mar2018 6 p.m. 52.36 34.50 29.50 103.10 05Mar2018 7 p.m. 36.82 31.10 59.13 0.00 05Mar2018 8 p.m. 49.73 15.10 36.38 0.00 05Mar2018 9 p.m. 46.47 9.90 36.37 0.00 05Mar2018 10 p.m. 45.93 12.20 38.01 0.00 05Mar2018 11 p.m. 45.25 14.70 39.40 0.00 06Mar2018 12 a.m. 44.51 17.90 43.80 0.00 06Mar2018 1 a.m. 44.56 19.30 42.30 0.00 06Mar2018 2 a.m. 45.36 23.90 41.75 0.00 06Mar2018 3 a.m. 44.89 29.70 42.25 0.00 06Mar2018 4 a.m. 43.38 28.90 44.14 0.00 06Mar2018 5 a.m. 41.34 25.80 46.67 0.00 06Mar2018 6 a.m. 41.65 27.90 43.09 0.00 06Mar2018 7 a.m. 41.31 28.40 43.61 0.60 Accuml. Values 1105.21 644.80 1128.20 5770.60 Num. Valid Values 24 24 24 24 Avg. Values 46.05 26.87 47.01 240.44 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 7.81 1037.48 47.01 496.16 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5299 definition: xcompl = 1 - (RELH_avg/100) TdC = -2.8592 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 = 0.5230 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4770 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.6148 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 = 5.6561 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 15.7522 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.391 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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