Detailed Weather Data for Project: FGIB

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 18.01 2.82 73.13 4.00 31Dec2017 9 a.m. 17.80 3.38 63.42 42.00 31Dec2017 10 a.m. 19.11 2.87 54.45 193.00 31Dec2017 11 a.m. 21.97 1.55 51.34 417.00 31Dec2017 12 p.m. 23.18 2.06 49.69 551.00 31Dec2017 1 p.m. 23.74 1.64 37.67 585.00 31Dec2017 2 p.m. 25.72 2.72 35.41 548.00 31Dec2017 3 p.m. 25.81 2.21 28.69 446.00 31Dec2017 4 p.m. 25.50 4.02 37.24 296.00 31Dec2017 5 p.m. 21.52 3.78 40.10 114.00 31Dec2017 6 p.m. 19.89 3.34 43.16 3.00 31Dec2017 7 p.m. 18.45 2.34 52.19 1.00 31Dec2017 8 p.m. 18.45 3.80 51.76 0.00 31Dec2017 9 p.m. 17.69 4.10 54.69 1.00 31Dec2017 10 p.m. 16.36 2.85 52.07 0.00 31Dec2017 11 p.m. 16.03 2.35 55.18 0.00 01Jan2018 12 a.m. 15.04 2.70 55.79 0.00 01Jan2018 1 a.m. 13.62 2.11 56.40 0.00 01Jan2018 2 a.m. 13.17 2.29 59.21 0.00 01Jan2018 3 a.m. 11.98 3.05 66.97 0.00 01Jan2018 4 a.m. 10.87 3.10 72.21 0.00 01Jan2018 5 a.m. 9.45 2.95 74.78 0.00 01Jan2018 6 a.m. 9.45 3.06 77.83 0.00 01Jan2018 7 a.m. 8.56 3.34 80.64 0.00 Accuml. Values 421.37 68.43 1324.02 3201.00 Num. Valid Values 24 24 24 24 Avg. Values 17.56 2.85 55.17 133.38 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -8.02 110.10 55.17 275.22 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4483 definition: xcompl = 1 - (RELH_avg/100) TdC = -15.4522 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 = 0.2841 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7159 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.3044 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 = 1.5131 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.0644 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.045 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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