Detailed Weather Data for Project: ARBU

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 45.86 12.47 85.25 103.00 03Mar2018 9 a.m. 50.12 14.91 76.00 214.33 03Mar2018 10 a.m. 54.77 16.78 66.00 428.25 03Mar2018 11 a.m. 57.44 15.51 61.67 492.00 03Mar2018 12 p.m. 61.29 15.10 58.25 627.75 03Mar2018 1 p.m. 64.34 16.03 55.33 794.00 03Mar2018 2 p.m. 67.55 15.94 50.00 768.75 03Mar2018 3 p.m. 68.18 17.45 48.25 571.25 03Mar2018 4 p.m. 68.72 17.95 47.25 516.50 03Mar2018 5 p.m. 67.37 17.95 49.00 330.50 03Mar2018 6 p.m. 64.76 15.21 53.00 50.00 03Mar2018 7 p.m. 60.62 9.84 60.00 0.00 03Mar2018 8 p.m. 58.64 9.28 64.00 0.00 03Mar2018 9 p.m. 57.62 10.36 64.33 0.00 03Mar2018 10 p.m. 59.48 14.24 57.67 0.00 03Mar2018 11 p.m. 59.72 14.32 54.00 0.00 04Mar2018 12 a.m. 59.06 11.71 54.67 0.00 04Mar2018 1 a.m. 59.27 11.91 54.75 0.00 04Mar2018 2 a.m. 59.49 13.48 54.75 0.00 04Mar2018 3 a.m. 59.06 11.18 57.33 0.00 04Mar2018 4 a.m. 59.27 10.46 58.75 0.00 04Mar2018 5 a.m. 59.54 12.86 61.00 0.00 04Mar2018 6 a.m. 57.60 9.79 64.75 0.00 04Mar2018 7 a.m. 56.03 11.30 67.50 1.00 Accuml. Values 1435.80 326.03 1423.50 4897.33 Num. Valid Values 24 24 24 24 Avg. Values 59.83 13.58 59.31 204.06 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.46 524.58 59.31 421.07 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4069 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.6261 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 = 0.6306 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3694 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.2096 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 = 7.1081 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 10.9052 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.263 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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