Detailed Weather Data for Project: ELKC

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. 35.26 6.23 72.11 29.97 08Nov2017 9 a.m. 36.37 6.01 69.67 182.67 08Nov2017 10 a.m. 40.01 6.50 61.76 468.25 08Nov2017 11 a.m. 44.15 5.09 56.72 619.55 08Nov2017 12 p.m. 48.16 3.18 51.01 700.22 08Nov2017 1 p.m. 51.85 2.92 44.28 707.96 08Nov2017 2 p.m. 54.55 3.02 36.92 650.89 08Nov2017 3 p.m. 57.31 2.17 32.34 524.17 08Nov2017 4 p.m. 59.05 1.60 29.69 345.38 08Nov2017 5 p.m. 58.21 2.21 30.82 137.02 08Nov2017 6 p.m. 52.93 2.64 37.05 2.32 08Nov2017 7 p.m. 50.67 6.10 46.46 0.00 08Nov2017 8 p.m. 46.63 2.69 53.48 0.00 08Nov2017 9 p.m. 45.07 1.18 61.52 0.00 08Nov2017 10 p.m. 44.80 1.61 69.05 0.00 08Nov2017 11 p.m. 40.77 2.99 69.73 0.00 09Nov2017 12 a.m. 39.15 2.23 73.40 0.00 09Nov2017 1 a.m. 39.06 2.17 75.93 0.00 09Nov2017 2 a.m. 39.25 1.43 80.97 0.00 09Nov2017 3 a.m. 38.75 1.86 79.44 0.00 09Nov2017 4 a.m. 38.75 1.63 85.13 0.00 09Nov2017 5 a.m. 36.70 3.54 84.95 0.00 09Nov2017 6 a.m. 36.18 3.99 78.47 0.00 09Nov2017 7 a.m. 35.83 3.38 77.37 0.00 Accuml. Values 1069.46 76.37 1458.27 4368.40 Num. Valid Values 24 24 24 24 Avg. Values 44.56 3.18 60.76 182.02 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.98 122.88 60.76 375.59 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3924 definition: xcompl = 1 - (RELH_avg/100) TdC = -0.0435 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 = 0.5106 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4894 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.0167 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 = 3.9261 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.5867 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.110 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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