Detailed Weather Data for Project: FGIB

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. -24.07 1.78 8.97 7.00 06Dec2017 9 a.m. -25.06 1.39 8.79 123.00 06Dec2017 10 a.m. -23.96 1.19 9.03 352.00 06Dec2017 11 a.m. -24.95 0.36 8.91 491.00 06Dec2017 12 p.m. -23.30 0.88 8.91 574.00 06Dec2017 1 p.m. -25.94 0.04 9.46 590.00 06Dec2017 2 p.m. 55.26 0.07 36.44 540.00 06Dec2017 3 p.m. 56.80 0.39 36.32 429.00 06Dec2017 4 p.m. 56.48 0.60 33.94 271.00 06Dec2017 5 p.m. 53.83 0.75 38.52 88.00 06Dec2017 6 p.m. 51.21 1.39 44.75 2.00 06Dec2017 7 p.m. 33.17 4.37 42.91 0.00 06Dec2017 8 p.m. 48.24 3.18 45.05 0.00 06Dec2017 9 p.m. 46.26 3.25 45.18 0.00 06Dec2017 10 p.m. 42.85 2.75 66.72 0.00 06Dec2017 11 p.m. 39.22 0.93 76.61 0.00 07Dec2017 12 a.m. 37.47 0.74 78.38 0.00 07Dec2017 1 a.m. 40.53 1.47 50.91 0.00 07Dec2017 2 a.m. 39.11 2.60 57.32 1.00 07Dec2017 3 a.m. 36.48 4.51 66.17 0.00 07Dec2017 4 a.m. 33.19 4.07 51.77 0.00 07Dec2017 5 a.m. 31.42 4.92 55.55 0.00 07Dec2017 6 a.m. 30.99 4.23 58.30 0.00 07Dec2017 7 a.m. 29.34 2.71 63.55 0.00 Accuml. Values 614.57 48.57 1002.46 3468.00 Num. Valid Values 24 24 24 24 Avg. Values 25.61 2.02 41.77 144.50 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -3.55 78.15 41.77 298.18 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5823 definition: xcompl = 1 - (RELH_avg/100) TdC = -14.7905 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 = 0.3493 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6507 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.6602 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 = 2.7777 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.5889 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.064 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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