Detailed Weather Data for Project: BIRC

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. 36.66 5.97 63.89 21.58 08Nov2017 9 a.m. 37.13 6.27 63.67 102.45 08Nov2017 10 a.m. 39.88 7.36 57.53 344.83 08Nov2017 11 a.m. 44.17 6.84 51.25 550.70 08Nov2017 12 p.m. 47.52 7.26 47.86 656.14 08Nov2017 1 p.m. 49.66 7.04 42.28 655.01 08Nov2017 2 p.m. 52.16 5.01 37.29 592.19 08Nov2017 3 p.m. 52.86 4.34 35.45 466.63 08Nov2017 4 p.m. 53.29 3.50 35.86 298.32 08Nov2017 5 p.m. 51.82 3.56 38.31 78.19 08Nov2017 6 p.m. 48.65 2.06 44.26 4.44 08Nov2017 7 p.m. 50.04 0.48 51.04 0.10 08Nov2017 8 p.m. 41.36 0.49 61.49 0.11 08Nov2017 9 p.m. 39.04 0.17 70.79 0.11 08Nov2017 10 p.m. 35.60 0.10 80.20 0.11 08Nov2017 11 p.m. 33.84 0.89 84.74 0.11 09Nov2017 12 a.m. 32.40 0.79 88.63 0.11 09Nov2017 1 a.m. 31.30 1.41 90.18 0.12 09Nov2017 2 a.m. 29.59 1.70 92.09 0.12 09Nov2017 3 a.m. 30.06 0.89 91.07 0.12 09Nov2017 4 a.m. 28.94 1.20 92.51 0.12 09Nov2017 5 a.m. 28.60 1.31 93.30 0.12 09Nov2017 6 a.m. 28.38 2.27 93.25 0.11 09Nov2017 7 a.m. 27.75 0.74 92.21 1.34 Accuml. Values 950.68 71.65 1599.15 3773.18 Num. Valid Values 24 24 24 24 Avg. Values 39.61 2.99 66.63 157.22 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.23 115.28 66.63 324.42 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3337 definition: xcompl = 1 - (RELH_avg/100) TdC = -1.3887 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 = 0.4687 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5313 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.2628 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 = 2.7568 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.8413 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.080 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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