Detailed Weather Data for Project: ELKC

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 50.31 2.30 89.57 0.00 04Nov2017 9 a.m. 50.52 4.59 89.86 5.21 04Nov2017 10 a.m. 51.30 4.22 88.58 71.77 04Nov2017 11 a.m. 52.97 2.29 84.83 137.15 04Nov2017 12 p.m. 53.98 1.28 83.23 117.38 04Nov2017 1 p.m. 54.72 1.42 84.54 130.71 04Nov2017 2 p.m. 55.99 0.84 84.26 214.18 04Nov2017 3 p.m. 55.94 1.34 85.48 183.37 04Nov2017 4 p.m. 56.16 0.55 85.35 112.78 04Nov2017 5 p.m. 56.46 0.56 84.80 65.07 04Nov2017 6 p.m. 56.80 1.61 84.59 15.05 04Nov2017 7 p.m. 56.59 1.33 85.68 0.00 04Nov2017 8 p.m. 53.96 5.68 67.16 0.00 04Nov2017 9 p.m. 55.17 3.54 88.56 0.00 04Nov2017 10 p.m. 53.20 2.50 92.31 0.00 04Nov2017 11 p.m. 54.48 3.21 90.75 0.00 05Nov2017 12 a.m. 53.92 1.24 93.97 0.00 05Nov2017 1 a.m. 53.20 1.97 95.99 0.00 05Nov2017 2 a.m. 54.73 1.32 96.83 0.00 05Nov2017 3 a.m. 54.00 5.99 97.86 0.00 05Nov2017 4 a.m. 56.26 4.62 98.37 0.00 05Nov2017 5 a.m. 58.15 0.86 98.67 0.00 05Nov2017 6 a.m. 59.59 2.69 99.01 0.00 05Nov2017 7 a.m. 59.56 3.76 99.33 0.00 Accuml. Values 1317.97 59.71 2149.58 1052.67 Num. Valid Values 24 24 24 24 Avg. Values 54.92 2.49 89.57 43.86 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 12.73 96.07 89.57 90.51 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1043 definition: xcompl = 1 - (RELH_avg/100) TdC = 11.0415 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 = 0.5939 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4061 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.0576 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 = 1.5530 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.0291 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.015 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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