Detailed Weather Data for Project: COPA

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 48.33 11.77 69.18 33.72 05Mar2018 9 a.m. 49.55 11.52 54.52 248.72 05Mar2018 10 a.m. 51.40 11.91 47.16 446.30 05Mar2018 11 a.m. 51.71 11.67 45.80 601.75 05Mar2018 12 p.m. 53.53 11.64 40.73 703.68 05Mar2018 1 p.m. 55.89 13.21 25.27 757.80 05Mar2018 2 p.m. 57.22 11.77 23.24 739.67 05Mar2018 3 p.m. 57.56 12.83 21.33 654.12 05Mar2018 4 p.m. 57.49 14.22 20.50 513.10 05Mar2018 5 p.m. 57.04 12.46 21.83 331.97 05Mar2018 6 p.m. 56.10 10.41 22.62 129.47 05Mar2018 7 p.m. 40.39 11.42 41.98 4.26 05Mar2018 8 p.m. 50.47 4.15 32.35 0.00 05Mar2018 9 p.m. 47.91 1.98 30.11 0.00 05Mar2018 10 p.m. 45.27 2.46 27.75 0.00 05Mar2018 11 p.m. 40.87 2.12 36.60 0.00 06Mar2018 12 a.m. 41.56 0.81 32.34 0.00 06Mar2018 1 a.m. 40.71 4.44 37.57 0.00 06Mar2018 2 a.m. 43.05 7.37 43.98 0.00 06Mar2018 3 a.m. 42.37 10.11 42.05 0.00 06Mar2018 4 a.m. 41.27 9.95 44.07 0.00 06Mar2018 5 a.m. 40.80 9.50 44.82 0.00 06Mar2018 6 a.m. 42.55 12.22 36.33 0.00 06Mar2018 7 a.m. 43.07 12.20 33.06 0.00 Accuml. Values 1156.10 222.14 875.19 5164.56 Num. Valid Values 24 24 24 24 Avg. Values 48.17 9.26 36.47 215.19 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 8.98 357.42 36.47 444.05 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6353 definition: xcompl = 1 - (RELH_avg/100) TdC = -5.2579 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 = 0.5404 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4596 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.0187 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 = 7.3610 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.4377 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.238 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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