Detailed Weather Data for Project: BIRC

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 39.43 7.34 90.91 12.18 07Nov2017 9 a.m. 39.90 7.82 88.27 33.85 07Nov2017 10 a.m. 40.30 7.98 86.51 63.90 07Nov2017 11 a.m. 40.84 7.74 83.40 74.29 07Nov2017 12 p.m. 40.57 7.40 84.57 72.22 07Nov2017 1 p.m. 40.77 7.38 84.01 89.71 07Nov2017 2 p.m. 41.59 6.51 80.11 93.60 07Nov2017 3 p.m. 43.25 6.61 73.85 93.35 07Nov2017 4 p.m. 44.80 7.66 64.83 60.16 07Nov2017 5 p.m. 44.65 7.93 64.12 26.62 07Nov2017 6 p.m. 43.72 8.36 66.21 1.30 07Nov2017 7 p.m. 44.92 1.31 51.45 0.10 07Nov2017 8 p.m. 41.95 8.81 70.53 0.12 07Nov2017 9 p.m. 41.50 7.09 68.41 0.11 07Nov2017 10 p.m. 41.49 6.94 65.77 0.11 07Nov2017 11 p.m. 41.67 8.25 64.47 0.12 08Nov2017 12 a.m. 41.56 7.56 65.17 0.11 08Nov2017 1 a.m. 41.50 7.47 64.53 0.11 08Nov2017 2 a.m. 41.49 7.03 63.51 0.10 08Nov2017 3 a.m. 41.34 5.43 64.04 0.10 08Nov2017 4 a.m. 40.57 4.42 65.84 0.10 08Nov2017 5 a.m. 39.43 4.01 65.98 0.11 08Nov2017 6 a.m. 37.81 4.97 63.23 0.11 08Nov2017 7 a.m. 37.00 5.66 62.77 0.36 Accuml. Values 992.06 161.68 1702.49 622.84 Num. Valid Values 24 24 24 24 Avg. Values 41.34 6.74 70.94 25.95 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 5.19 260.14 70.94 53.55 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2906 definition: xcompl = 1 - (RELH_avg/100) TdC = 0.3857 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 = 0.4834 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5166 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.5273 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 = 2.5639 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.6894 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.045 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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