Detailed Weather Data for Project: BIRC

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 27.79 4.42 71.11 2.68 29Dec2017 9 a.m. 28.98 3.56 70.83 25.58 29Dec2017 10 a.m. 31.93 6.85 65.84 50.16 29Dec2017 11 a.m. 34.02 10.79 65.00 104.29 29Dec2017 12 p.m. 35.62 11.02 66.06 157.25 29Dec2017 1 p.m. 37.11 8.41 63.95 174.44 29Dec2017 2 p.m. 38.93 7.34 63.95 261.65 29Dec2017 3 p.m. 39.20 6.15 66.81 145.33 29Dec2017 4 p.m. 38.82 5.91 69.80 78.15 29Dec2017 5 p.m. 38.46 4.56 71.08 20.16 29Dec2017 6 p.m. 38.46 2.60 71.48 1.14 29Dec2017 7 p.m. 20.95 2.33 51.87 0.10 29Dec2017 8 p.m. 37.58 0.97 73.02 0.10 29Dec2017 9 p.m. 37.22 1.21 74.58 0.10 29Dec2017 10 p.m. 36.77 1.17 75.70 0.10 29Dec2017 11 p.m. 36.61 1.72 76.33 0.10 30Dec2017 12 a.m. 36.55 2.56 76.78 0.10 30Dec2017 1 a.m. 36.59 2.96 76.34 0.10 30Dec2017 2 a.m. 36.39 2.37 75.46 0.10 30Dec2017 3 a.m. 36.14 4.50 73.23 0.10 30Dec2017 4 a.m. 28.87 11.17 78.56 0.12 30Dec2017 5 a.m. 24.39 10.72 81.48 0.12 30Dec2017 6 a.m. 22.32 9.64 85.43 0.13 30Dec2017 7 a.m. 20.68 9.74 85.33 0.13 Accuml. Values 800.36 132.67 1730.02 1022.23 Num. Valid Values 24 24 24 24 Avg. Values 33.35 5.53 72.08 42.59 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 0.75 213.47 72.08 87.89 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2792 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.6785 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 = 0.4151 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5849 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2540 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 = 1.8037 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.7461 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.036 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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