Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 44.69 7.24 81.24 61.49 03Mar2018 9 a.m. 48.81 10.62 73.31 266.81 03Mar2018 10 a.m. 53.87 14.22 62.81 481.78 03Mar2018 11 a.m. 57.43 13.53 60.64 403.96 03Mar2018 12 p.m. 60.22 15.18 59.27 634.20 03Mar2018 1 p.m. 63.46 15.16 56.13 757.42 03Mar2018 2 p.m. 65.01 17.28 53.62 749.81 03Mar2018 3 p.m. 67.12 17.31 50.20 656.77 03Mar2018 4 p.m. 67.21 17.25 49.62 415.56 03Mar2018 5 p.m. 67.37 16.04 48.98 220.95 03Mar2018 6 p.m. 66.81 15.90 48.45 129.68 03Mar2018 7 p.m. 60.55 13.17 78.92 0.00 03Mar2018 8 p.m. 62.53 9.25 54.54 0.00 03Mar2018 9 p.m. 60.76 12.34 56.99 0.00 03Mar2018 10 p.m. 59.68 10.96 56.99 0.00 03Mar2018 11 p.m. 59.16 8.49 55.28 0.00 04Mar2018 12 a.m. 59.11 7.97 54.23 0.00 04Mar2018 1 a.m. 58.82 8.20 53.48 0.00 04Mar2018 2 a.m. 58.78 7.33 53.14 0.00 04Mar2018 3 a.m. 57.76 4.66 55.41 0.00 04Mar2018 4 a.m. 58.98 8.30 55.12 0.00 04Mar2018 5 a.m. 59.56 8.78 58.41 0.00 04Mar2018 6 a.m. 59.68 15.22 61.52 0.00 04Mar2018 7 a.m. 59.13 13.24 64.68 0.00 Accuml. Values 1436.52 287.64 1402.98 4778.43 Num. Valid Values 24 24 24 24 Avg. Values 59.85 11.98 58.46 199.10 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.48 462.81 58.46 410.85 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4154 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.4254 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 = 0.6308 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3692 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.0681 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 = 7.2696 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 10.0966 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.248 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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