Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 57.97 11.47 67.43 0.00 04Mar2018 9 a.m. 56.79 12.93 72.90 14.71 04Mar2018 10 a.m. 57.58 11.47 70.57 76.00 04Mar2018 11 a.m. 58.80 11.62 74.38 90.79 04Mar2018 12 p.m. 60.82 14.70 75.50 211.74 04Mar2018 1 p.m. 61.84 15.41 74.77 140.92 04Mar2018 2 p.m. 62.20 15.98 74.49 99.03 04Mar2018 3 p.m. 62.46 14.45 75.14 30.18 04Mar2018 4 p.m. 62.20 14.71 75.09 40.46 04Mar2018 5 p.m. 61.86 15.76 74.81 73.16 04Mar2018 6 p.m. 61.32 11.97 76.43 1.49 04Mar2018 7 p.m. 57.02 7.28 12.13 3.49 04Mar2018 8 p.m. 59.36 14.64 82.30 0.00 04Mar2018 9 p.m. 58.82 11.67 85.84 0.00 04Mar2018 10 p.m. 58.15 11.83 88.62 0.00 04Mar2018 11 p.m. 58.87 13.84 89.17 0.00 05Mar2018 12 a.m. 60.94 16.13 88.40 0.00 05Mar2018 1 a.m. 61.34 18.98 88.06 0.00 05Mar2018 2 a.m. 60.80 21.00 90.46 0.00 05Mar2018 3 a.m. 60.93 22.98 90.98 0.00 05Mar2018 4 a.m. 60.44 21.00 92.54 0.00 05Mar2018 5 a.m. 59.97 17.77 89.79 0.00 05Mar2018 6 a.m. 56.08 26.38 56.20 0.00 05Mar2018 7 a.m. 48.40 19.21 52.50 0.00 Accuml. Values 1424.98 373.18 1818.50 781.97 Num. Valid Values 24 24 24 24 Avg. Values 59.37 15.55 75.77 32.58 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.21 600.45 75.77 67.23 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2423 definition: xcompl = 1 - (RELH_avg/100) TdC = 11.0107 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 = 0.6273 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3727 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2783 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 = 4.1466 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.5558 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.104 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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