Detailed Weather Data for Project: FGIB

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 16.38 0.07 62.15 3.00 02Jan2018 9 a.m. 19.00 0.34 53.30 51.00 02Jan2018 10 a.m. 21.20 0.19 49.14 127.00 02Jan2018 11 a.m. 21.76 0.16 44.44 132.00 02Jan2018 12 p.m. 24.39 0.05 46.03 142.00 02Jan2018 1 p.m. 24.71 0.22 45.42 258.00 02Jan2018 2 p.m. 24.51 0.37 44.93 228.00 02Jan2018 3 p.m. 24.06 0.35 40.90 201.00 02Jan2018 4 p.m. 25.59 0.54 43.77 155.00 02Jan2018 5 p.m. 24.51 0.28 42.31 59.00 02Jan2018 6 p.m. 24.84 1.83 44.56 5.00 02Jan2018 7 p.m. 33.73 0.38 49.45 1.00 02Jan2018 8 p.m. 24.17 0.74 46.94 0.00 02Jan2018 9 p.m. 22.08 0.14 60.25 0.00 02Jan2018 10 p.m. 20.77 0.17 69.22 0.00 02Jan2018 11 p.m. 21.63 0.05 64.71 0.00 03Jan2018 12 a.m. 20.98 0.18 60.07 0.00 03Jan2018 1 a.m. 20.53 0.06 66.41 0.00 03Jan2018 2 a.m. 18.68 0.04 78.38 0.00 03Jan2018 3 a.m. 18.68 0.14 75.88 0.00 03Jan2018 4 a.m. 17.13 0.04 82.35 0.00 03Jan2018 5 a.m. 16.92 0.56 81.80 0.00 03Jan2018 6 a.m. 17.13 0.49 80.82 0.00 03Jan2018 7 a.m. 18.45 0.26 71.11 0.00 Accuml. Values 521.83 7.65 1404.34 1362.00 Num. Valid Values 24 24 24 24 Avg. Values 21.74 0.32 58.51 56.75 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -5.70 12.31 58.51 117.10 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4149 definition: xcompl = 1 - (RELH_avg/100) TdC = -12.5282 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 = 0.3175 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6825 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.0701 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 = 1.6717 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.7162 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.018 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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