Detailed Weather Data for Project: ELKC

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 50.07 2.43 83.00 11.28 03Dec2017 9 a.m. 53.01 3.38 80.07 173.89 03Dec2017 10 a.m. 55.04 5.65 79.62 344.74 03Dec2017 11 a.m. 61.36 11.64 73.20 394.13 03Dec2017 12 p.m. 62.96 13.65 70.41 521.18 03Dec2017 1 p.m. 65.41 13.78 63.55 564.87 03Dec2017 2 p.m. 67.15 14.63 56.85 459.33 03Dec2017 3 p.m. 67.30 16.53 57.69 355.97 03Dec2017 4 p.m. 67.32 15.18 63.28 228.89 03Dec2017 5 p.m. 67.41 9.02 64.11 58.27 03Dec2017 6 p.m. 65.61 9.22 68.93 0.00 03Dec2017 7 p.m. 57.79 11.05 38.10 0.00 03Dec2017 8 p.m. 64.90 13.23 73.48 0.00 03Dec2017 9 p.m. 64.72 16.21 73.81 0.00 03Dec2017 10 p.m. 64.80 16.26 70.36 0.00 03Dec2017 11 p.m. 64.98 15.61 68.15 0.00 04Dec2017 12 a.m. 64.74 18.11 69.16 0.00 04Dec2017 1 a.m. 64.04 16.68 70.68 0.00 04Dec2017 2 a.m. 63.48 16.51 71.24 0.00 04Dec2017 3 a.m. 63.25 16.11 72.09 0.00 04Dec2017 4 a.m. 63.21 19.03 73.33 0.00 04Dec2017 5 a.m. 62.85 18.23 75.77 0.00 04Dec2017 6 a.m. 63.01 18.37 78.29 0.00 04Dec2017 7 a.m. 63.54 14.39 80.44 0.00 Accuml. Values 1507.94 324.90 1675.61 3112.55 Num. Valid Values 24 24 24 24 Avg. Values 62.83 13.54 69.82 129.69 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 17.13 522.76 69.82 267.62 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3018 definition: xcompl = 1 - (RELH_avg/100) TdC = 11.6529 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 = 0.6520 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3480 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.2381 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 = 5.8261 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 9.1293 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.183 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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