Detailed Weather Data for Project: ELKC

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 40.55 8.34 93.08 0.12 07Nov2017 9 a.m. 40.91 7.19 91.04 16.57 07Nov2017 10 a.m. 41.59 7.91 85.58 36.92 07Nov2017 11 a.m. 41.97 8.28 82.41 78.62 07Nov2017 12 p.m. 43.05 6.77 78.27 136.95 07Nov2017 1 p.m. 45.61 8.50 68.44 313.80 07Nov2017 2 p.m. 46.53 8.60 67.75 221.72 07Nov2017 3 p.m. 46.35 7.43 67.53 87.60 07Nov2017 4 p.m. 45.52 9.13 68.94 26.38 07Nov2017 5 p.m. 44.91 9.70 69.26 0.01 07Nov2017 6 p.m. 44.06 8.64 67.31 0.00 07Nov2017 7 p.m. 48.85 1.99 47.31 0.00 07Nov2017 8 p.m. 43.95 7.90 65.94 0.00 07Nov2017 9 p.m. 44.08 6.97 65.26 0.00 07Nov2017 10 p.m. 44.24 7.67 64.45 0.00 07Nov2017 11 p.m. 43.84 6.31 63.90 0.00 08Nov2017 12 a.m. 43.65 6.65 63.10 0.00 08Nov2017 1 a.m. 42.03 5.90 63.57 0.00 08Nov2017 2 a.m. 39.79 4.56 66.11 0.00 08Nov2017 3 a.m. 38.82 5.34 63.51 0.00 08Nov2017 4 a.m. 38.52 5.48 62.17 0.00 08Nov2017 5 a.m. 37.81 4.86 65.33 0.00 08Nov2017 6 a.m. 36.91 5.25 67.70 0.00 08Nov2017 7 a.m. 36.10 5.58 69.59 0.00 Accuml. Values 1019.64 164.95 1667.55 918.69 Num. Valid Values 24 24 24 24 Avg. Values 42.49 6.87 69.48 38.28 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 5.83 265.40 69.48 78.99 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3052 definition: xcompl = 1 - (RELH_avg/100) TdC = 0.7156 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 = 0.4931 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5069 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2777 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 = 2.8132 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.9561 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.054 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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