Detailed Weather Data for Project: BIRC

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 52.09 11.44 50.32 0.10 04Mar2018 9 a.m. 52.03 11.60 52.04 0.10 04Mar2018 10 a.m. 53.17 12.12 51.59 0.10 04Mar2018 11 a.m. 54.97 14.94 50.85 0.11 04Mar2018 12 p.m. 55.49 14.10 51.01 0.11 04Mar2018 1 p.m. 55.89 14.64 51.82 0.11 04Mar2018 2 p.m. 56.41 14.21 54.05 0.10 04Mar2018 3 p.m. 55.58 14.00 58.93 0.10 04Mar2018 4 p.m. 55.11 12.29 64.17 0.11 04Mar2018 5 p.m. 55.27 17.04 68.05 0.11 04Mar2018 6 p.m. 53.33 14.49 72.83 0.11 04Mar2018 7 p.m. 52.95 3.62 16.54 6.30 04Mar2018 8 p.m. 52.97 10.82 72.34 0.11 04Mar2018 9 p.m. 53.02 10.74 78.79 0.10 04Mar2018 10 p.m. 52.95 11.13 80.75 0.10 04Mar2018 11 p.m. 53.08 13.38 79.68 0.10 05Mar2018 12 a.m. 53.04 13.54 79.50 0.10 05Mar2018 1 a.m. 53.38 11.59 77.94 0.10 05Mar2018 2 a.m. 54.01 13.69 78.16 0.10 05Mar2018 3 a.m. 55.45 14.68 80.09 0.10 05Mar2018 4 a.m. 56.86 14.81 81.62 0.10 05Mar2018 5 a.m. 58.12 12.21 83.03 0.10 05Mar2018 6 a.m. 58.10 8.97 84.81 0.11 05Mar2018 7 a.m. 56.25 9.47 76.62 0.10 Accuml. Values 1309.53 299.52 1595.53 8.68 Num. Valid Values 24 24 24 24 Avg. Values 54.56 12.48 66.48 0.36 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 12.54 481.93 66.48 0.75 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3352 definition: xcompl = 1 - (RELH_avg/100) TdC = 6.5267 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 = 0.5912 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4088 definition: del_lambda2 = 1 - del_lambda1 Qn = -1.0124 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 = 4.8353 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.2742 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.094 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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