Detailed Weather Data for Project: COPA

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 42.01 0.22 98.86 0.00 03Dec2017 9 a.m. 44.65 2.35 98.78 89.27 03Dec2017 10 a.m. 52.90 7.85 90.01 234.70 03Dec2017 11 a.m. 59.02 10.70 77.06 381.36 03Dec2017 12 p.m. 62.83 10.73 70.39 467.32 03Dec2017 1 p.m. 65.80 11.45 62.33 501.41 03Dec2017 2 p.m. 66.27 11.31 60.25 363.17 03Dec2017 3 p.m. 66.34 11.34 64.79 254.43 03Dec2017 4 p.m. 67.69 11.11 62.51 179.81 03Dec2017 5 p.m. 66.65 7.70 65.29 16.44 03Dec2017 6 p.m. 66.52 8.99 65.00 0.00 03Dec2017 7 p.m. 59.29 12.33 27.99 0.00 03Dec2017 8 p.m. 62.69 8.14 78.02 0.00 03Dec2017 9 p.m. 61.86 7.10 81.48 0.00 03Dec2017 10 p.m. 63.10 10.44 74.69 0.00 03Dec2017 11 p.m. 64.20 14.62 69.81 0.00 04Dec2017 12 a.m. 63.41 14.26 72.87 0.00 04Dec2017 1 a.m. 62.67 13.41 74.67 0.00 04Dec2017 2 a.m. 62.10 12.64 74.86 0.00 04Dec2017 3 a.m. 62.46 12.63 75.10 0.00 04Dec2017 4 a.m. 63.09 14.34 75.17 0.00 04Dec2017 5 a.m. 63.27 14.93 78.14 0.00 04Dec2017 6 a.m. 63.88 11.99 80.16 0.00 04Dec2017 7 a.m. 64.22 12.07 81.92 0.00 Accuml. Values 1476.93 252.65 1760.15 2487.91 Num. Valid Values 24 24 24 24 Avg. Values 61.54 10.53 73.34 103.66 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 16.41 406.51 73.34 213.91 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2666 definition: xcompl = 1 - (RELH_avg/100) TdC = 11.6938 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 = 0.6429 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3571 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.5103 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 = 4.9191 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.4965 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.130 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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