Detailed Weather Data for Project: ELKC

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 48.85 11.19 66.55 30.67 05Mar2018 9 a.m. 49.15 8.55 58.25 308.41 05Mar2018 10 a.m. 51.53 10.45 49.49 565.40 05Mar2018 11 a.m. 52.05 11.69 44.43 753.28 05Mar2018 12 p.m. 54.27 9.92 40.90 837.90 05Mar2018 1 p.m. 57.43 11.52 23.87 938.85 05Mar2018 2 p.m. 58.82 10.76 18.14 914.70 05Mar2018 3 p.m. 59.36 10.98 16.01 806.61 05Mar2018 4 p.m. 59.92 11.70 14.19 630.33 05Mar2018 5 p.m. 59.54 10.61 14.72 402.42 05Mar2018 6 p.m. 57.85 8.49 15.44 145.88 05Mar2018 7 p.m. 39.78 10.78 42.39 5.13 05Mar2018 8 p.m. 52.75 3.85 20.60 0.00 05Mar2018 9 p.m. 50.70 2.01 31.32 0.00 05Mar2018 10 p.m. 49.28 2.77 38.20 0.00 05Mar2018 11 p.m. 48.15 1.62 35.24 0.00 06Mar2018 12 a.m. 46.24 3.08 36.75 0.00 06Mar2018 1 a.m. 45.95 5.26 30.77 0.00 06Mar2018 2 a.m. 43.38 5.82 32.66 0.00 06Mar2018 3 a.m. 41.22 3.07 36.67 0.00 06Mar2018 4 a.m. 42.42 4.75 33.60 0.00 06Mar2018 5 a.m. 44.10 7.30 28.75 0.00 06Mar2018 6 a.m. 42.98 7.08 32.83 0.00 06Mar2018 7 a.m. 42.26 6.86 34.42 0.00 Accuml. Values 1197.97 180.11 796.19 6339.58 Num. Valid Values 24 24 24 24 Avg. Values 49.92 7.50 33.17 264.15 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 9.95 289.80 33.17 545.08 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6683 definition: xcompl = 1 - (RELH_avg/100) TdC = -5.6524 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 = 0.5545 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4455 definition: del_lambda2 = 1 - del_lambda1 Qn = 5.4707 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 = 8.2577 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.0789 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.261 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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