Detailed Weather Data for Project: COPA

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. 40.73 0.22 91.52 7.25 02Dec2017 9 a.m. 42.66 1.77 89.48 120.96 02Dec2017 10 a.m. 47.14 1.72 76.97 261.68 02Dec2017 11 a.m. 52.97 3.26 58.25 377.77 02Dec2017 12 p.m. 57.42 2.70 51.23 448.26 02Dec2017 1 p.m. 59.97 3.19 51.58 465.50 02Dec2017 2 p.m. 62.58 3.09 48.39 418.77 02Dec2017 3 p.m. 64.24 2.95 46.87 322.30 02Dec2017 4 p.m. 65.25 3.67 46.29 182.21 02Dec2017 5 p.m. 63.66 3.38 50.12 49.77 02Dec2017 6 p.m. 60.82 1.76 54.90 0.00 02Dec2017 7 p.m. 63.59 5.60 72.97 0.00 02Dec2017 8 p.m. 53.89 1.40 70.48 0.00 02Dec2017 9 p.m. 51.15 2.03 80.28 0.00 02Dec2017 10 p.m. 49.55 1.93 85.76 0.00 02Dec2017 11 p.m. 48.65 0.95 89.05 0.00 03Dec2017 12 a.m. 47.66 0.17 94.61 0.00 03Dec2017 1 a.m. 46.18 0.46 97.29 0.00 03Dec2017 2 a.m. 45.61 2.33 98.76 0.00 03Dec2017 3 a.m. 44.80 2.45 98.22 0.00 03Dec2017 4 a.m. 44.51 2.19 98.60 0.00 03Dec2017 5 a.m. 44.35 1.25 98.70 0.00 03Dec2017 6 a.m. 44.06 1.04 98.80 0.00 03Dec2017 7 a.m. 43.92 0.99 98.83 0.00 Accuml. Values 1245.34 50.50 1847.95 2654.47 Num. Valid Values 24 24 24 24 Avg. Values 51.89 2.10 77.00 110.60 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 11.05 81.25 77.00 228.23 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2300 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.2047 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 = 0.5703 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4297 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.4583 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 = 3.0133 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.7307 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.062 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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