Detailed Weather Data for Project: SARD

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 47.68 15.50 64.62 124.80 03Mar2018 9 a.m. 49.96 17.50 58.57 346.80 03Mar2018 10 a.m. 53.46 19.40 51.67 546.20 03Mar2018 11 a.m. 56.37 20.30 47.23 695.80 03Mar2018 12 p.m. 59.34 19.00 44.83 785.50 03Mar2018 1 p.m. 63.07 16.60 40.17 806.80 03Mar2018 2 p.m. 65.08 17.30 37.96 758.50 03Mar2018 3 p.m. 66.38 15.10 36.36 641.30 03Mar2018 4 p.m. 67.10 15.00 35.79 475.10 03Mar2018 5 p.m. 66.69 15.90 35.56 266.90 03Mar2018 6 p.m. 64.72 13.90 39.15 70.10 03Mar2018 7 p.m. 53.67 12.50 72.29 0.00 03Mar2018 8 p.m. 58.96 11.60 48.22 0.00 03Mar2018 9 p.m. 59.07 16.10 43.48 0.00 03Mar2018 10 p.m. 58.35 14.60 43.16 0.00 03Mar2018 11 p.m. 58.68 13.00 42.06 0.00 04Mar2018 12 a.m. 58.64 14.90 40.55 0.00 04Mar2018 1 a.m. 57.63 17.90 41.46 0.00 04Mar2018 2 a.m. 56.68 17.00 43.84 0.00 04Mar2018 3 a.m. 55.90 16.20 45.47 0.00 04Mar2018 4 a.m. 55.24 17.20 47.52 0.00 04Mar2018 5 a.m. 55.17 15.70 48.34 0.00 04Mar2018 6 a.m. 54.79 18.70 49.77 0.00 04Mar2018 7 a.m. 54.27 21.00 51.85 0.00 Accuml. Values 1396.90 391.90 1109.92 5517.80 Num. Valid Values 24 24 24 24 Avg. Values 58.20 16.33 46.25 229.91 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 14.56 630.57 46.25 474.42 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5375 definition: xcompl = 1 - (RELH_avg/100) TdC = 3.1059 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 = 0.6187 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3813 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.8877 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 = 8.9484 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 15.4688 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.351 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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