Detailed Weather Data for Project: BIRC

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 29.07 1.81 62.41 0.12 06Dec2017 9 a.m. 31.78 2.65 56.47 2.65 06Dec2017 10 a.m. 39.18 0.59 45.24 0.12 06Dec2017 11 a.m. 44.76 1.51 39.48 0.11 06Dec2017 12 p.m. 48.25 5.21 32.55 0.11 06Dec2017 1 p.m. 51.01 3.93 27.40 0.10 06Dec2017 2 p.m. 52.14 5.18 26.09 0.57 06Dec2017 3 p.m. 51.69 5.83 26.66 30.49 06Dec2017 4 p.m. 51.37 6.40 26.64 0.26 06Dec2017 5 p.m. 49.23 5.46 28.88 0.10 06Dec2017 6 p.m. 45.19 2.74 33.82 0.11 06Dec2017 7 p.m. 28.04 2.65 36.95 0.10 06Dec2017 8 p.m. 39.94 0.73 36.22 0.11 06Dec2017 9 p.m. 37.67 0.36 41.99 0.12 06Dec2017 10 p.m. 34.52 0.82 46.35 0.12 06Dec2017 11 p.m. 32.40 1.56 56.99 0.11 07Dec2017 12 a.m. 33.12 3.82 53.51 0.11 07Dec2017 1 a.m. 32.97 5.60 58.05 0.11 07Dec2017 2 a.m. 31.12 4.95 62.67 0.11 07Dec2017 3 a.m. 29.30 7.96 51.62 0.11 07Dec2017 4 a.m. 27.01 7.97 49.13 0.12 07Dec2017 5 a.m. 24.80 6.13 54.07 0.11 07Dec2017 6 a.m. 23.18 5.30 58.77 0.11 07Dec2017 7 a.m. 21.56 3.78 64.12 0.11 Accuml. Values 889.30 92.94 1076.08 36.19 Num. Valid Values 24 24 24 24 Avg. Values 37.05 3.87 44.84 1.51 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 2.81 149.54 44.84 3.11 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5516 definition: xcompl = 1 - (RELH_avg/100) TdC = -8.0840 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 = 0.4469 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5531 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.9931 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 = 4.1730 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.0011 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.048 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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