Detailed Weather Data for Project: BIRC

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 32.16 3.76 36.55 0.10 05Dec2017 9 a.m. 32.76 3.44 35.80 0.10 05Dec2017 10 a.m. 33.84 3.15 35.05 0.10 05Dec2017 11 a.m. 36.93 4.02 28.95 0.10 05Dec2017 12 p.m. 39.79 4.62 22.37 228.01 05Dec2017 1 p.m. 41.22 4.04 20.06 486.47 05Dec2017 2 p.m. 42.64 3.80 19.17 389.84 05Dec2017 3 p.m. 44.73 3.69 17.73 404.79 05Dec2017 4 p.m. 45.45 4.36 17.34 257.25 05Dec2017 5 p.m. 44.02 4.42 20.81 68.12 05Dec2017 6 p.m. 41.31 3.68 28.41 1.18 05Dec2017 7 p.m. 42.46 2.69 33.41 0.11 05Dec2017 8 p.m. 38.17 3.78 35.98 0.12 05Dec2017 9 p.m. 37.72 4.42 39.34 0.12 05Dec2017 10 p.m. 36.66 4.63 38.00 0.11 05Dec2017 11 p.m. 34.86 5.09 42.42 0.12 06Dec2017 12 a.m. 34.77 4.85 43.46 0.12 06Dec2017 1 a.m. 34.14 4.52 44.67 0.11 06Dec2017 2 a.m. 33.44 3.22 48.25 0.12 06Dec2017 3 a.m. 32.16 2.29 52.01 0.11 06Dec2017 4 a.m. 32.20 3.55 52.55 0.11 06Dec2017 5 a.m. 31.33 2.42 54.94 0.11 06Dec2017 6 a.m. 30.00 2.41 58.37 0.11 06Dec2017 7 a.m. 28.87 1.45 62.01 0.11 Accuml. Values 881.63 88.30 887.65 1837.54 Num. Valid Values 24 24 24 24 Avg. Values 36.73 3.68 36.99 76.56 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 2.63 142.07 36.99 157.99 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6301 definition: xcompl = 1 - (RELH_avg/100) TdC = -10.7491 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 = 0.4441 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5559 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.4395 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 = 4.7132 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.2557 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.079 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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