Detailed Weather Data for Project: ELDR

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 53.62 12.10 63.57 32.80 04Mar2018 9 a.m. 56.59 12.40 60.77 95.00 04Mar2018 10 a.m. 59.47 16.50 61.22 153.90 04Mar2018 11 a.m. 61.90 18.90 60.62 270.40 04Mar2018 12 p.m. 64.87 18.40 59.60 304.00 04Mar2018 1 p.m. 67.75 18.80 55.39 596.90 04Mar2018 2 p.m. 69.71 20.20 54.29 554.30 04Mar2018 3 p.m. 68.79 18.90 59.31 227.10 04Mar2018 4 p.m. 66.11 19.30 62.26 107.90 04Mar2018 5 p.m. 63.57 19.50 61.29 53.60 04Mar2018 6 p.m. 61.12 18.20 66.41 7.60 04Mar2018 7 p.m. 52.57 14.70 20.42 3.50 04Mar2018 8 p.m. 57.36 16.30 78.06 0.00 04Mar2018 9 p.m. 57.40 13.50 84.42 0.00 04Mar2018 10 p.m. 56.95 15.80 90.50 0.00 04Mar2018 11 p.m. 56.57 17.10 96.98 0.00 05Mar2018 12 a.m. 56.05 14.90 100.01 0.00 05Mar2018 1 a.m. 56.77 16.70 100.38 0.00 05Mar2018 2 a.m. 57.24 16.60 100.02 0.00 05Mar2018 3 a.m. 58.01 15.20 99.62 0.00 05Mar2018 4 a.m. 59.41 12.40 97.46 0.00 05Mar2018 5 a.m. 57.63 14.80 92.24 0.00 05Mar2018 6 a.m. 47.62 26.70 76.99 0.00 05Mar2018 7 a.m. 45.64 22.90 71.76 0.00 Accuml. Values 1412.72 410.80 1773.59 2407.00 Num. Valid Values 24 24 24 24 Avg. Values 58.86 17.12 73.90 100.29 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 14.92 660.98 73.90 206.95 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2610 definition: xcompl = 1 - (RELH_avg/100) TdC = 10.3684 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 = 0.6236 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3764 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.3610 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 = 4.3847 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.5810 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.161 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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