Detailed Weather Data for Project: TRUS

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 53.10 4.92 83.40 10.00 03Mar2018 9 a.m. 57.04 1.44 79.31 185.00 03Mar2018 10 a.m. 60.89 10.31 71.25 391.00 03Mar2018 11 a.m. 62.76 16.66 67.29 589.00 03Mar2018 12 p.m. 65.19 17.60 60.03 637.00 03Mar2018 1 p.m. 68.25 16.81 51.47 758.00 03Mar2018 2 p.m. 70.02 18.53 46.53 850.00 03Mar2018 3 p.m. 72.64 19.84 43.41 811.00 03Mar2018 4 p.m. 73.96 19.36 43.04 642.00 03Mar2018 5 p.m. 72.88 23.09 46.10 447.00 03Mar2018 6 p.m. 71.98 22.30 51.04 295.00 03Mar2018 7 p.m. 73.40 23.21 58.91 72.00 03Mar2018 8 p.m. 66.94 15.85 60.94 1.00 03Mar2018 9 p.m. 64.53 17.77 66.00 0.00 03Mar2018 10 p.m. 61.88 13.71 78.34 0.00 03Mar2018 11 p.m. 60.46 13.08 82.00 1.00 04Mar2018 12 a.m. 58.91 12.78 84.63 0.00 04Mar2018 1 a.m. 60.89 12.53 82.49 0.00 04Mar2018 2 a.m. 59.90 13.45 86.64 0.00 04Mar2018 3 a.m. 61.00 8.85 87.50 1.00 04Mar2018 4 a.m. 63.19 10.56 85.72 1.00 04Mar2018 5 a.m. 63.09 14.02 85.97 0.00 04Mar2018 6 a.m. 63.30 10.73 86.40 0.00 04Mar2018 7 a.m. 62.65 9.89 87.25 0.00 Accuml. Values 1548.84 347.29 1675.66 5691.00 Num. Valid Values 24 24 24 24 Avg. Values 64.54 14.47 69.82 237.13 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 18.08 558.79 69.82 489.31 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3018 definition: xcompl = 1 - (RELH_avg/100) TdC = 12.5637 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 = 0.6637 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3363 definition: del_lambda2 = 1 - del_lambda1 Qn = 5.4292 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 = 6.1792 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 10.1335 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.276 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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