Detailed Weather Data for Project: COPA

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 19.06 12.69 77.57 0.00 30Dec2017 9 a.m. 18.07 11.26 72.95 2.32 30Dec2017 10 a.m. 16.66 12.34 69.71 35.34 30Dec2017 11 a.m. 16.12 10.43 67.24 78.76 30Dec2017 12 p.m. 16.59 9.28 63.00 99.80 30Dec2017 1 p.m. 17.71 8.02 59.70 114.55 30Dec2017 2 p.m. 18.72 7.10 55.98 117.71 30Dec2017 3 p.m. 20.70 5.22 50.96 112.32 30Dec2017 4 p.m. 22.59 4.38 46.03 58.58 30Dec2017 5 p.m. 23.09 3.91 44.41 19.72 30Dec2017 6 p.m. 21.76 2.93 46.19 0.00 30Dec2017 7 p.m. 12.99 8.98 46.64 0.00 30Dec2017 8 p.m. 19.38 5.42 47.96 0.00 30Dec2017 9 p.m. 18.90 5.79 47.98 0.00 30Dec2017 10 p.m. 17.87 6.98 48.21 0.00 30Dec2017 11 p.m. 17.29 7.17 47.43 0.00 31Dec2017 12 a.m. 16.05 7.95 49.15 0.00 31Dec2017 1 a.m. 14.36 10.23 50.81 0.00 31Dec2017 2 a.m. 13.21 11.73 53.02 0.00 31Dec2017 3 a.m. 12.45 11.45 54.24 0.00 31Dec2017 4 a.m. 12.49 9.06 56.64 0.00 31Dec2017 5 a.m. 12.54 9.31 53.82 0.00 31Dec2017 6 a.m. 12.34 10.45 54.60 0.00 31Dec2017 7 a.m. 11.53 13.71 57.18 0.00 Accuml. Values 402.47 205.79 1321.42 639.10 Num. Valid Values 24 24 24 24 Avg. Values 16.77 8.57 55.06 26.63 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -8.46 331.12 55.06 54.95 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4494 definition: xcompl = 1 - (RELH_avg/100) TdC = -15.8866 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 = 0.2780 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7220 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.5987 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 = 1.4659 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.9326 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.048 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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