Detailed Weather Data for Project: EUFA

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 18.14 2.59 72.96 2.00 31Dec2017 9 a.m. 18.25 2.39 70.09 33.00 31Dec2017 10 a.m. 19.35 3.86 64.29 104.00 31Dec2017 11 a.m. 19.13 3.79 57.88 170.00 31Dec2017 12 p.m. 22.98 2.92 45.73 414.00 31Dec2017 1 p.m. 23.09 3.67 43.41 584.00 31Dec2017 2 p.m. 24.08 3.95 37.49 545.00 31Dec2017 3 p.m. 24.84 4.78 33.64 445.00 31Dec2017 4 p.m. 24.40 3.31 32.18 313.00 31Dec2017 5 p.m. 23.20 3.95 31.81 138.00 31Dec2017 6 p.m. 20.44 3.53 36.33 5.00 31Dec2017 7 p.m. 17.47 2.80 48.29 0.00 31Dec2017 8 p.m. 18.36 3.12 43.23 0.00 31Dec2017 9 p.m. 17.71 2.87 48.36 0.00 31Dec2017 10 p.m. 16.72 3.29 47.26 0.00 31Dec2017 11 p.m. 16.27 3.81 49.52 0.00 01Jan2018 12 a.m. 15.28 3.32 51.90 0.00 01Jan2018 1 a.m. 14.29 3.78 52.88 0.00 01Jan2018 2 a.m. 13.30 3.45 54.59 0.00 01Jan2018 3 a.m. 12.76 3.16 59.41 0.00 01Jan2018 4 a.m. 11.21 3.63 66.92 0.00 01Jan2018 5 a.m. 9.79 3.49 69.06 0.00 01Jan2018 6 a.m. 9.34 3.52 72.35 0.00 01Jan2018 7 a.m. 8.37 3.15 74.06 0.00 Accuml. Values 418.75 82.13 1263.64 2753.00 Num. Valid Values 24 24 24 24 Avg. Values 17.45 3.42 52.65 114.71 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -8.08 132.15 52.65 236.70 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4735 definition: xcompl = 1 - (RELH_avg/100) TdC = -16.0863 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 = 0.2832 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7168 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.9470 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 = 1.5924 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.2096 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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