Detailed Weather Data for Project: FGIB

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 51.85 2.53 52.98 22.00 03Mar2018 9 a.m. 55.49 3.33 47.92 287.00 03Mar2018 10 a.m. 59.11 4.09 44.01 479.00 03Mar2018 11 a.m. 61.63 4.92 41.94 637.00 03Mar2018 12 p.m. 63.72 4.16 39.19 743.00 03Mar2018 1 p.m. 64.94 5.66 39.13 788.00 03Mar2018 2 p.m. 67.14 5.39 37.54 759.00 03Mar2018 3 p.m. 68.77 4.20 36.26 673.00 03Mar2018 4 p.m. 69.55 4.18 35.59 503.00 03Mar2018 5 p.m. 69.33 4.73 36.32 325.00 03Mar2018 6 p.m. 66.04 2.21 40.29 123.00 03Mar2018 7 p.m. 57.34 3.43 65.62 1.00 03Mar2018 8 p.m. 61.20 1.05 45.11 0.00 03Mar2018 9 p.m. 60.21 2.81 39.68 0.00 03Mar2018 10 p.m. 59.32 2.67 38.70 0.00 03Mar2018 11 p.m. 57.69 2.31 43.16 0.00 04Mar2018 12 a.m. 56.70 2.50 45.54 0.00 04Mar2018 1 a.m. 56.03 1.51 47.67 0.00 04Mar2018 2 a.m. 56.59 0.68 47.74 0.00 04Mar2018 3 a.m. 56.16 2.02 48.35 0.00 04Mar2018 4 a.m. 55.92 1.79 48.35 0.00 04Mar2018 5 a.m. 56.70 3.12 47.86 0.00 04Mar2018 6 a.m. 56.14 5.01 48.77 0.00 04Mar2018 7 a.m. 55.94 4.62 50.06 1.00 Accuml. Values 1443.49 78.92 1067.78 5341.00 Num. Valid Values 24 24 24 24 Avg. Values 60.15 3.29 44.49 222.54 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.64 126.98 44.49 459.22 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5551 definition: xcompl = 1 - (RELH_avg/100) TdC = 3.5264 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 = 0.6329 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3671 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.7650 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 = 9.9071 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.9306 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.204 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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