Detailed Weather Data for Project: BIRC

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 47.03 8.56 61.01 0.10 05Mar2018 9 a.m. 49.33 8.26 47.32 0.10 05Mar2018 10 a.m. 51.69 8.82 38.72 0.10 05Mar2018 11 a.m. 52.56 8.52 37.09 0.10 05Mar2018 12 p.m. 54.59 9.21 27.77 0.10 05Mar2018 1 p.m. 56.25 9.77 18.89 0.11 05Mar2018 2 p.m. 57.22 9.47 16.30 0.10 05Mar2018 3 p.m. 58.32 8.34 14.08 0.10 05Mar2018 4 p.m. 58.30 8.36 13.30 0.11 05Mar2018 5 p.m. 57.69 7.22 13.66 24.37 05Mar2018 6 p.m. 56.14 6.49 13.72 96.51 05Mar2018 7 p.m. 40.87 8.87 35.65 0.11 05Mar2018 8 p.m. 50.04 2.30 19.25 0.10 05Mar2018 9 p.m. 46.42 1.72 31.86 0.11 05Mar2018 10 p.m. 41.76 1.69 56.54 0.11 05Mar2018 11 p.m. 39.74 1.07 50.24 0.11 06Mar2018 12 a.m. 39.34 1.06 40.07 0.10 06Mar2018 1 a.m. 39.22 1.97 40.85 0.11 06Mar2018 2 a.m. 38.43 4.07 39.89 0.10 06Mar2018 3 a.m. 37.85 3.49 39.63 0.10 06Mar2018 4 a.m. 40.08 2.74 32.72 0.11 06Mar2018 5 a.m. 38.52 3.51 34.93 0.11 06Mar2018 6 a.m. 39.78 4.26 31.34 0.11 06Mar2018 7 a.m. 41.07 5.61 26.48 0.12 Accuml. Values 1132.21 135.38 781.31 123.20 Num. Valid Values 24 24 24 24 Avg. Values 47.18 5.64 32.55 5.13 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 8.43 217.83 32.55 10.59 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6745 definition: xcompl = 1 - (RELH_avg/100) TdC = -7.2401 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 = 0.5322 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4678 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.9189 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 = 7.5256 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.2122 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.095 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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