Detailed Weather Data for Project: FGIB

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 62.19 1.95 84.48 20.00 05Mar2018 9 a.m. 54.93 2.60 63.36 159.00 05Mar2018 10 a.m. 58.23 0.55 47.31 493.00 05Mar2018 11 a.m. 59.88 1.41 43.52 661.00 05Mar2018 12 p.m. 60.10 0.61 39.92 771.00 05Mar2018 1 p.m. 59.43 0.79 41.33 819.00 05Mar2018 2 p.m. 61.11 0.57 30.59 786.00 05Mar2018 3 p.m. 60.98 0.47 31.93 701.00 05Mar2018 4 p.m. 61.11 0.77 28.63 541.00 05Mar2018 5 p.m. 61.09 0.53 27.90 296.00 05Mar2018 6 p.m. 58.14 0.50 33.46 151.00 05Mar2018 7 p.m. 46.47 0.82 41.39 6.00 05Mar2018 8 p.m. 54.82 0.37 30.58 0.00 05Mar2018 9 p.m. 49.66 0.51 54.82 0.00 05Mar2018 10 p.m. 47.35 2.43 54.14 0.00 05Mar2018 11 p.m. 45.48 2.59 48.47 0.00 06Mar2018 12 a.m. 43.84 1.94 62.87 0.00 06Mar2018 1 a.m. 42.42 0.71 69.90 0.00 06Mar2018 2 a.m. 40.66 0.40 72.27 0.00 06Mar2018 3 a.m. 39.33 1.75 71.91 0.00 06Mar2018 4 a.m. 38.01 1.68 69.83 0.00 06Mar2018 5 a.m. 42.30 1.37 53.78 0.00 06Mar2018 6 a.m. 41.76 0.07 67.64 0.00 06Mar2018 7 a.m. 40.12 0.21 64.59 2.00 Accuml. Values 1229.39 25.60 1234.62 5406.00 Num. Valid Values 24 24 24 24 Avg. Values 51.22 1.07 51.44 225.25 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 10.68 41.19 51.44 464.81 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4856 definition: xcompl = 1 - (RELH_avg/100) TdC = 1.0691 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 = 0.5650 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4350 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.4268 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 = 6.2632 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.7110 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.145 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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