Detailed Weather Data for Project: BIRC

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. 38.57 0.00 78.16 0.64 02Dec2017 9 a.m. 43.07 0.01 69.84 2.64 02Dec2017 10 a.m. 50.05 0.71 56.90 5.48 02Dec2017 11 a.m. 56.25 1.18 50.02 7.60 02Dec2017 12 p.m. 60.46 1.24 47.69 1.69 02Dec2017 1 p.m. 61.72 2.63 48.27 0.19 02Dec2017 2 p.m. 64.09 2.13 45.14 0.10 02Dec2017 3 p.m. 64.13 3.44 46.47 0.09 02Dec2017 4 p.m. 64.26 3.40 46.79 0.09 02Dec2017 5 p.m. 62.02 2.31 51.02 0.10 02Dec2017 6 p.m. 59.29 1.17 55.96 0.10 02Dec2017 7 p.m. 63.05 8.86 68.28 0.10 02Dec2017 8 p.m. 51.89 0.98 73.84 0.10 02Dec2017 9 p.m. 49.03 0.76 86.63 0.11 02Dec2017 10 p.m. 47.48 1.08 89.47 0.11 02Dec2017 11 p.m. 46.08 0.30 90.83 0.11 03Dec2017 12 a.m. 45.03 0.04 92.74 0.11 03Dec2017 1 a.m. 44.35 0.14 93.05 0.11 03Dec2017 2 a.m. 42.40 0.64 93.44 0.11 03Dec2017 3 a.m. 40.87 1.70 92.70 0.11 03Dec2017 4 a.m. 41.59 0.46 91.84 0.11 03Dec2017 5 a.m. 43.05 0.37 90.82 0.11 03Dec2017 6 a.m. 43.68 0.32 92.90 0.11 03Dec2017 7 a.m. 43.36 0.06 93.76 0.11 Accuml. Values 1225.78 33.93 1746.56 20.13 Num. Valid Values 24 23 24 24 Avg. Values 51.07 1.48 72.77 0.84 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 10.60 56.97 72.77 1.73 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2723 definition: xcompl = 1 - (RELH_avg/100) TdC = 5.9620 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 = 0.5638 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4362 definition: del_lambda2 = 1 - del_lambda1 Qn = -1.0029 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 = 3.4572 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.7433 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.008 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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