Detailed Weather Data for Project: COPA

Date Time TAIR WSPD RELH SRAD 05Nov2017 8 a.m. 58.55 3.83 100.08 13.92 05Nov2017 9 a.m. 56.52 3.75 100.07 74.25 05Nov2017 10 a.m. 56.61 5.60 100.17 168.83 05Nov2017 11 a.m. 54.82 6.39 99.88 121.78 05Nov2017 12 p.m. 55.20 7.64 99.21 74.21 05Nov2017 1 p.m. 54.23 9.51 96.12 77.24 05Nov2017 2 p.m. 54.14 9.89 88.89 74.78 05Nov2017 3 p.m. 53.91 9.75 84.52 61.23 05Nov2017 4 p.m. 54.05 9.71 80.90 43.41 05Nov2017 5 p.m. 52.79 9.03 81.02 7.04 05Nov2017 6 p.m. 52.92 5.08 79.32 0.00 05Nov2017 7 p.m. 40.93 5.28 97.05 0.00 05Nov2017 8 p.m. 52.30 5.33 76.64 0.00 05Nov2017 9 p.m. 50.90 5.77 77.07 0.00 05Nov2017 10 p.m. 48.02 7.64 79.78 0.00 05Nov2017 11 p.m. 45.37 4.74 84.13 0.00 06Nov2017 12 a.m. 45.55 3.96 81.88 0.00 06Nov2017 1 a.m. 45.27 4.32 82.78 0.00 06Nov2017 2 a.m. 45.81 3.94 83.28 0.00 06Nov2017 3 a.m. 46.11 3.40 82.96 0.00 06Nov2017 4 a.m. 46.09 4.56 82.97 0.00 06Nov2017 5 a.m. 44.94 5.84 78.44 0.00 06Nov2017 6 a.m. 43.81 5.85 80.60 0.00 06Nov2017 7 a.m. 42.89 5.56 84.51 0.00 Accuml. Values 1201.73 146.37 2082.27 716.69 Num. Valid Values 24 24 24 24 Avg. Values 50.07 6.10 86.76 29.86 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 10.04 235.51 86.76 61.62 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1324 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.9228 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 = 0.5558 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4442 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.4021 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 = 1.6429 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.7073 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.021 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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