Detailed Weather Data for Project: COPA

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. 36.39 5.37 72.35 0.62 08Nov2017 9 a.m. 36.95 4.10 70.62 67.26 08Nov2017 10 a.m. 40.89 4.96 62.56 288.25 08Nov2017 11 a.m. 44.55 6.50 58.98 485.29 08Nov2017 12 p.m. 46.83 7.39 54.00 558.00 08Nov2017 1 p.m. 50.22 5.06 46.85 564.60 08Nov2017 2 p.m. 52.03 6.17 40.80 516.91 08Nov2017 3 p.m. 53.19 5.17 36.35 412.41 08Nov2017 4 p.m. 53.51 4.83 35.08 264.77 08Nov2017 5 p.m. 52.95 2.88 35.76 92.01 08Nov2017 6 p.m. 49.82 1.83 42.50 0.00 08Nov2017 7 p.m. 52.39 2.96 47.40 0.00 08Nov2017 8 p.m. 44.20 0.32 61.27 0.00 08Nov2017 9 p.m. 41.99 0.58 78.98 0.00 08Nov2017 10 p.m. 37.51 1.27 84.74 0.00 08Nov2017 11 p.m. 34.88 2.18 86.84 0.00 09Nov2017 12 a.m. 33.87 1.00 87.93 0.00 09Nov2017 1 a.m. 33.64 1.37 88.46 0.00 09Nov2017 2 a.m. 30.72 2.08 97.38 0.00 09Nov2017 3 a.m. 31.15 0.10 98.65 0.00 09Nov2017 4 a.m. 31.05 1.49 98.75 0.00 09Nov2017 5 a.m. 31.30 1.10 98.79 0.00 09Nov2017 6 a.m. 30.06 1.34 98.82 0.00 09Nov2017 7 a.m. 31.12 2.13 98.86 0.00 Accuml. Values 981.21 72.18 1682.72 3250.12 Num. Valid Values 24 24 24 24 Avg. Values 40.88 3.01 70.11 135.42 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.94 116.14 70.11 279.45 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2989 definition: xcompl = 1 - (RELH_avg/100) TdC = -0.0159 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 = 0.4796 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5204 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.7881 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 = 2.5913 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.7494 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.070 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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