Detailed Weather Data for Project: ELKC

Date Time TAIR WSPD RELH SRAD 06Nov2017 8 a.m. 40.84 8.46 75.19 3.31 06Nov2017 9 a.m. 40.89 9.05 74.54 50.65 06Nov2017 10 a.m. 40.19 10.04 75.72 99.21 06Nov2017 11 a.m. 40.23 9.74 76.63 153.53 06Nov2017 12 p.m. 40.77 8.51 79.34 128.91 06Nov2017 1 p.m. 41.56 7.78 78.63 139.40 06Nov2017 2 p.m. 41.56 6.91 80.84 104.12 06Nov2017 3 p.m. 41.50 6.54 83.56 79.09 06Nov2017 4 p.m. 41.49 6.78 86.55 35.34 06Nov2017 5 p.m. 41.68 6.28 87.23 4.84 06Nov2017 6 p.m. 41.29 7.02 87.09 0.00 06Nov2017 7 p.m. 43.86 7.63 65.98 0.00 06Nov2017 8 p.m. 41.38 6.22 89.41 0.00 06Nov2017 9 p.m. 41.59 6.32 90.21 0.00 06Nov2017 10 p.m. 41.56 6.10 91.15 0.00 06Nov2017 11 p.m. 41.49 5.75 90.95 0.00 07Nov2017 12 a.m. 41.47 5.95 91.52 0.00 07Nov2017 1 a.m. 41.41 6.88 92.20 0.00 07Nov2017 2 a.m. 41.47 6.83 92.08 0.00 07Nov2017 3 a.m. 41.36 7.12 91.31 0.00 07Nov2017 4 a.m. 41.11 6.07 92.83 0.00 07Nov2017 5 a.m. 41.18 6.61 93.04 0.00 07Nov2017 6 a.m. 41.22 6.42 92.92 0.00 07Nov2017 7 a.m. 40.89 7.53 93.83 0.00 Accuml. Values 991.97 172.54 2052.75 798.40 Num. Valid Values 24 24 24 24 Avg. Values 41.33 7.19 85.53 33.27 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 5.18 277.62 85.53 68.65 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1447 definition: xcompl = 1 - (RELH_avg/100) TdC = 2.9444 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 = 0.4834 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5166 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.3844 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 = 1.2918 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.5347 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.024 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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