Detailed Weather Data for Project: ELKC

Date Time TAIR WSPD RELH SRAD 05Nov2017 8 a.m. 55.36 4.58 99.34 4.34 05Nov2017 9 a.m. 54.45 3.63 98.59 45.47 05Nov2017 10 a.m. 55.20 5.31 97.41 100.97 05Nov2017 11 a.m. 55.22 6.44 93.65 97.30 05Nov2017 12 p.m. 54.54 7.10 89.49 96.66 05Nov2017 1 p.m. 54.19 6.21 86.98 83.57 05Nov2017 2 p.m. 54.45 7.31 80.61 99.18 05Nov2017 3 p.m. 54.19 7.41 78.10 85.75 05Nov2017 4 p.m. 53.69 6.07 76.41 66.93 05Nov2017 5 p.m. 54.21 5.02 72.73 20.22 05Nov2017 6 p.m. 54.41 3.68 70.35 0.00 05Nov2017 7 p.m. 41.18 6.27 88.62 0.00 05Nov2017 8 p.m. 52.12 6.84 67.96 0.00 05Nov2017 9 p.m. 49.12 5.59 73.58 0.00 05Nov2017 10 p.m. 47.03 6.46 76.56 0.00 05Nov2017 11 p.m. 45.63 7.91 78.22 0.00 06Nov2017 12 a.m. 44.02 7.91 81.63 0.00 06Nov2017 1 a.m. 43.54 6.26 82.82 0.00 06Nov2017 2 a.m. 44.01 9.24 81.55 0.00 06Nov2017 3 a.m. 42.44 8.78 84.92 0.00 06Nov2017 4 a.m. 41.18 5.44 87.63 0.00 06Nov2017 5 a.m. 41.45 6.93 85.10 0.00 06Nov2017 6 a.m. 41.38 8.66 81.58 0.00 06Nov2017 7 a.m. 40.84 9.06 76.40 0.00 Accuml. Values 1173.85 158.11 1990.23 700.39 Num. Valid Values 24 24 24 24 Avg. Values 48.91 6.59 82.93 29.18 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 9.39 254.40 82.93 60.22 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1707 definition: xcompl = 1 - (RELH_avg/100) TdC = 6.6434 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 = 0.5464 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4536 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.4233 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 = 2.0171 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.1467 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.029 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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