Detailed Weather Data for Project: TRUS

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 27.37 13.85 94.82 2.00 30Dec2017 9 a.m. 25.74 14.21 94.41 7.00 30Dec2017 10 a.m. 25.18 14.09 94.53 22.00 30Dec2017 11 a.m. 24.30 13.95 94.10 39.00 30Dec2017 12 p.m. 24.19 12.48 93.67 60.00 30Dec2017 1 p.m. 23.97 10.90 92.64 71.00 30Dec2017 2 p.m. 23.76 10.88 92.88 81.00 30Dec2017 3 p.m. 23.97 9.90 90.68 66.00 30Dec2017 4 p.m. 24.19 8.74 89.89 52.00 30Dec2017 5 p.m. 24.30 7.39 88.42 42.00 30Dec2017 6 p.m. 23.65 4.94 88.06 10.00 30Dec2017 7 p.m. 19.15 7.65 46.11 0.00 30Dec2017 8 p.m. 23.31 5.14 93.55 2.00 30Dec2017 9 p.m. 22.77 3.76 93.67 2.00 30Dec2017 10 p.m. 22.42 4.27 93.67 3.00 30Dec2017 11 p.m. 22.98 3.37 93.86 2.00 31Dec2017 12 a.m. 22.98 2.37 93.80 2.00 31Dec2017 1 a.m. 23.65 3.01 94.28 2.00 31Dec2017 2 a.m. 23.76 3.94 94.22 2.00 31Dec2017 3 a.m. 23.54 6.06 93.99 2.00 31Dec2017 4 a.m. 22.23 9.20 92.22 2.00 31Dec2017 5 a.m. 21.78 12.52 89.04 2.00 31Dec2017 6 a.m. 21.00 12.00 86.83 2.00 31Dec2017 7 a.m. 20.46 11.99 85.49 2.00 Accuml. Values 560.62 206.61 2164.83 477.00 Num. Valid Values 24 24 24 24 Avg. Values 23.36 8.61 90.20 19.88 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -4.80 332.44 90.20 41.01 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.0980 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.1866 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 = 0.3307 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6693 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.6950 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 = 0.4315 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.6606 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.008 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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