Detailed Weather Data for Project: ELKC

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 54.00 8.18 53.84 19.41 04Mar2018 9 a.m. 55.71 11.25 51.89 74.37 04Mar2018 10 a.m. 57.87 13.10 50.88 150.03 04Mar2018 11 a.m. 59.04 13.30 51.97 181.29 04Mar2018 12 p.m. 59.68 14.10 52.62 316.29 04Mar2018 1 p.m. 60.03 18.78 53.08 355.01 04Mar2018 2 p.m. 58.95 17.76 53.39 250.35 04Mar2018 3 p.m. 59.27 17.02 54.83 269.27 04Mar2018 4 p.m. 58.39 17.54 60.38 156.93 04Mar2018 5 p.m. 57.52 18.37 64.35 62.36 04Mar2018 6 p.m. 57.07 13.72 64.44 10.56 04Mar2018 7 p.m. 54.79 5.12 17.94 2.16 04Mar2018 8 p.m. 56.26 15.20 71.42 0.00 04Mar2018 9 p.m. 56.05 13.87 73.20 0.00 04Mar2018 10 p.m. 55.63 13.76 75.45 0.00 04Mar2018 11 p.m. 55.36 12.64 78.66 0.00 05Mar2018 12 a.m. 55.04 11.29 81.98 0.00 05Mar2018 1 a.m. 55.09 12.06 79.64 0.00 05Mar2018 2 a.m. 55.15 11.46 77.20 0.00 05Mar2018 3 a.m. 55.45 11.25 77.18 0.00 05Mar2018 4 a.m. 55.81 12.37 78.35 0.00 05Mar2018 5 a.m. 56.32 12.79 79.69 0.00 05Mar2018 6 a.m. 56.80 10.44 81.72 0.00 05Mar2018 7 a.m. 55.40 8.41 82.02 0.00 Accuml. Values 1360.69 313.78 1566.12 1848.03 Num. Valid Values 24 24 24 24 Avg. Values 56.70 13.07 65.26 77.00 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.72 504.87 65.26 158.89 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3474 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.3869 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 = 0.6074 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3926 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.7416 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 = 5.4128 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.3277 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.146 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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