Detailed Weather Data for Project: ARBU

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 17.92 16.16 87.75 2.50 31Dec2017 9 a.m. 17.48 13.20 87.67 21.67 31Dec2017 10 a.m. 17.33 15.71 77.75 69.75 31Dec2017 11 a.m. 18.20 15.36 69.33 126.00 31Dec2017 12 p.m. 18.95 15.04 61.50 195.25 31Dec2017 1 p.m. 19.52 13.65 58.00 201.00 31Dec2017 2 p.m. 19.94 15.43 53.50 225.25 31Dec2017 3 p.m. 21.61 15.27 48.25 161.25 31Dec2017 4 p.m. 23.41 14.20 42.50 234.00 31Dec2017 5 p.m. 22.60 15.88 41.50 127.25 31Dec2017 6 p.m. 19.40 14.54 45.00 0.00 31Dec2017 7 p.m. 18.32 14.09 46.00 0.00 31Dec2017 8 p.m. 17.06 8.50 47.00 0.00 31Dec2017 9 p.m. 16.34 8.84 48.00 0.00 31Dec2017 10 p.m. 15.68 11.18 47.67 0.00 31Dec2017 11 p.m. 14.86 10.96 52.75 0.00 01Jan2018 12 a.m. 13.60 10.46 55.25 0.00 01Jan2018 1 a.m. 12.38 10.07 58.75 0.00 01Jan2018 2 a.m. 11.12 8.39 62.75 0.00 01Jan2018 3 a.m. 10.46 8.05 67.00 0.00 01Jan2018 4 a.m. 10.27 10.96 66.50 0.00 01Jan2018 5 a.m. 9.32 12.30 67.00 0.00 01Jan2018 6 a.m. 8.38 11.30 68.75 0.00 01Jan2018 7 a.m. 7.52 9.73 70.50 0.00 Accuml. Values 381.67 299.27 1430.67 1363.92 Num. Valid Values 24 24 24 24 Avg. Values 15.90 12.47 59.61 56.83 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -8.94 481.53 59.61 117.27 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4039 definition: xcompl = 1 - (RELH_avg/100) TdC = -15.3617 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 = 0.2713 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7287 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.1006 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 = 1.2660 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.2354 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.063 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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