Detailed Weather Data for Project: COPA

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 42.78 8.41 74.07 61.53 03Mar2018 9 a.m. 47.66 9.93 64.22 238.96 03Mar2018 10 a.m. 52.52 11.90 55.77 417.95 03Mar2018 11 a.m. 56.46 13.38 49.92 534.33 03Mar2018 12 p.m. 60.10 13.65 45.33 644.27 03Mar2018 1 p.m. 62.38 13.01 43.67 713.30 03Mar2018 2 p.m. 64.63 12.88 42.44 684.21 03Mar2018 3 p.m. 66.06 12.85 41.78 590.04 03Mar2018 4 p.m. 66.99 12.57 41.28 456.16 03Mar2018 5 p.m. 66.67 12.50 41.38 293.33 03Mar2018 6 p.m. 64.80 9.94 43.85 104.37 03Mar2018 7 p.m. 54.93 11.67 66.47 0.00 03Mar2018 8 p.m. 59.43 7.72 50.59 0.00 03Mar2018 9 p.m. 58.44 7.92 51.22 0.00 03Mar2018 10 p.m. 55.36 5.46 55.53 0.00 03Mar2018 11 p.m. 54.68 7.39 53.82 0.00 04Mar2018 12 a.m. 51.40 4.11 59.17 0.00 04Mar2018 1 a.m. 51.91 7.60 53.08 0.00 04Mar2018 2 a.m. 50.74 6.77 53.72 0.00 04Mar2018 3 a.m. 50.65 9.67 53.93 0.00 04Mar2018 4 a.m. 51.51 8.76 53.52 0.00 04Mar2018 5 a.m. 50.65 6.95 55.52 0.00 04Mar2018 6 a.m. 50.04 4.91 58.54 0.00 04Mar2018 7 a.m. 52.03 8.05 54.47 0.00 Accuml. Values 1342.83 228.00 1263.29 4738.45 Num. Valid Values 24 24 24 24 Avg. Values 55.95 9.50 52.64 197.44 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.31 366.85 52.64 407.41 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4736 definition: xcompl = 1 - (RELH_avg/100) TdC = 3.8433 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 = 0.6018 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3982 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.8544 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 = 7.2452 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.4769 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.224 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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