Detailed Weather Data for Project: BIRC

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 19.33 9.59 80.58 1.70 30Dec2017 9 a.m. 18.46 11.50 73.78 15.49 30Dec2017 10 a.m. 17.92 9.46 71.41 38.76 30Dec2017 11 a.m. 17.17 9.04 68.74 77.83 30Dec2017 12 p.m. 16.70 7.90 66.61 112.77 30Dec2017 1 p.m. 16.83 7.08 64.31 118.72 30Dec2017 2 p.m. 17.58 6.94 62.24 122.58 30Dec2017 3 p.m. 18.23 6.19 58.98 100.99 30Dec2017 4 p.m. 18.68 7.02 56.98 63.80 30Dec2017 5 p.m. 19.60 6.31 52.72 22.04 30Dec2017 6 p.m. 20.25 4.12 51.93 1.19 30Dec2017 7 p.m. 12.85 8.53 44.15 0.12 30Dec2017 8 p.m. 21.63 6.30 47.09 0.10 30Dec2017 9 p.m. 20.77 7.47 46.33 0.12 30Dec2017 10 p.m. 19.94 7.26 48.00 0.11 30Dec2017 11 p.m. 19.35 8.37 49.19 0.12 31Dec2017 12 a.m. 17.83 10.03 49.31 0.12 31Dec2017 1 a.m. 16.43 11.35 49.22 0.12 31Dec2017 2 a.m. 14.61 10.65 54.47 0.12 31Dec2017 3 a.m. 12.99 11.58 57.37 0.12 31Dec2017 4 a.m. 12.16 10.46 55.80 0.12 31Dec2017 5 a.m. 12.02 8.68 58.16 0.12 31Dec2017 6 a.m. 12.22 8.61 53.33 0.12 31Dec2017 7 a.m. 11.86 9.03 54.66 0.12 Accuml. Values 405.41 203.47 1375.36 677.40 Num. Valid Values 24 24 24 24 Avg. Values 16.89 8.48 57.31 28.22 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -8.39 327.38 57.31 58.24 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4269 definition: xcompl = 1 - (RELH_avg/100) TdC = -15.3290 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 = 0.2789 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7211 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.5725 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 = 1.3985 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.8396 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.046 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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