Detailed Weather Data for Project: COPA

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 48.87 2.98 98.47 0.00 04Nov2017 9 a.m. 48.81 3.17 99.05 5.10 04Nov2017 10 a.m. 49.57 2.97 99.19 35.96 04Nov2017 11 a.m. 51.15 3.44 99.01 80.56 04Nov2017 12 p.m. 53.15 2.37 95.68 73.45 04Nov2017 1 p.m. 54.27 2.58 94.79 103.09 04Nov2017 2 p.m. 54.95 1.83 96.14 103.19 04Nov2017 3 p.m. 54.82 2.01 98.50 117.40 04Nov2017 4 p.m. 56.08 1.38 96.02 106.59 04Nov2017 5 p.m. 57.69 1.44 89.17 78.75 04Nov2017 6 p.m. 57.33 1.77 87.75 34.06 04Nov2017 7 p.m. 55.85 1.79 92.45 0.86 04Nov2017 8 p.m. 52.65 2.17 80.76 0.00 04Nov2017 9 p.m. 53.10 1.31 98.60 0.00 04Nov2017 10 p.m. 52.12 0.61 99.07 0.00 04Nov2017 11 p.m. 51.82 0.52 99.18 0.00 05Nov2017 12 a.m. 50.94 0.43 99.27 0.00 05Nov2017 1 a.m. 49.32 0.74 99.26 0.00 05Nov2017 2 a.m. 47.91 2.08 99.26 0.00 05Nov2017 3 a.m. 50.02 2.89 99.39 0.00 05Nov2017 4 a.m. 54.28 4.93 99.62 0.00 05Nov2017 5 a.m. 58.33 4.10 99.86 0.00 05Nov2017 6 a.m. 61.43 5.15 100.12 0.00 05Nov2017 7 a.m. 62.40 2.78 100.16 0.00 Accuml. Values 1286.85 55.44 2320.77 739.01 Num. Valid Values 24 24 24 24 Avg. Values 53.62 2.31 96.70 30.79 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 12.01 89.20 96.70 63.54 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.0330 definition: xcompl = 1 - (RELH_avg/100) TdC = 11.4843 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 = 0.5839 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4161 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.3596 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 = 0.4797 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.3556 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.000 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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