Detailed Weather Data for Project: COPA

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 40.39 8.16 98.88 2.36 07Nov2017 9 a.m. 40.71 8.89 97.26 31.65 07Nov2017 10 a.m. 41.13 7.72 94.57 72.91 07Nov2017 11 a.m. -901.00 9.34 -901.00 -901.00 07Nov2017 12 p.m. 41.43 9.78 92.08 80.88 07Nov2017 1 p.m. 42.55 8.78 86.06 130.33 07Nov2017 2 p.m. 44.87 8.05 76.47 157.36 07Nov2017 3 p.m. 45.93 8.87 70.57 94.91 07Nov2017 4 p.m. 46.04 10.39 70.81 62.22 07Nov2017 5 p.m. 45.19 9.86 71.27 17.33 07Nov2017 6 p.m. 44.15 9.30 74.35 0.00 07Nov2017 7 p.m. 46.89 1.68 47.46 0.00 07Nov2017 8 p.m. 42.96 6.68 70.80 0.00 07Nov2017 9 p.m. 43.03 7.99 69.04 0.00 07Nov2017 10 p.m. 43.18 7.27 69.30 0.00 07Nov2017 11 p.m. 43.16 5.47 68.57 0.00 08Nov2017 12 a.m. 43.12 4.83 66.97 0.00 08Nov2017 1 a.m. 42.96 4.23 66.77 0.00 08Nov2017 2 a.m. 42.24 3.80 68.55 0.00 08Nov2017 3 a.m. 40.80 5.84 70.24 0.00 08Nov2017 4 a.m. 39.33 6.34 71.54 0.00 08Nov2017 5 a.m. 38.44 7.13 68.86 0.00 08Nov2017 6 a.m. 37.89 6.43 69.46 0.00 08Nov2017 7 a.m. 36.97 6.67 71.93 0.00 Accuml. Values 973.37 173.50 1711.81 649.95 Num. Valid Values 23 24 23 23 Avg. Values 42.32 7.23 74.43 28.26 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 5.73 279.16 74.43 58.31 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2557 definition: xcompl = 1 - (RELH_avg/100) TdC = 1.5713 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 = 0.4917 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5083 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.4776 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 = 2.3438 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.6018 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.043 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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