Detailed Weather Data for Project: HEYB

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. 43.16 8.50 69.31 8.60 08Nov2017 9 a.m. 42.40 9.30 67.59 82.20 08Nov2017 10 a.m. 43.07 7.70 65.88 201.30 08Nov2017 11 a.m. 44.96 7.50 61.68 304.70 08Nov2017 12 p.m. 46.58 6.40 58.84 232.40 08Nov2017 1 p.m. 48.56 4.50 54.69 288.50 08Nov2017 2 p.m. 50.83 5.10 48.32 236.40 08Nov2017 3 p.m. 51.64 4.10 46.27 156.10 08Nov2017 4 p.m. 52.38 2.20 44.79 123.50 08Nov2017 5 p.m. 52.30 1.70 44.31 30.80 08Nov2017 6 p.m. 49.33 1.80 51.81 0.00 08Nov2017 7 p.m. 52.38 0.80 63.85 0.00 08Nov2017 8 p.m. 43.18 1.80 76.64 0.00 08Nov2017 9 p.m. 41.81 1.80 80.17 0.00 08Nov2017 10 p.m. 39.31 0.80 82.05 0.00 08Nov2017 11 p.m. 37.38 0.40 86.97 0.00 09Nov2017 12 a.m. 35.89 0.60 90.94 0.00 09Nov2017 1 a.m. 36.05 1.30 93.41 0.00 09Nov2017 2 a.m. 35.06 1.40 92.13 0.00 09Nov2017 3 a.m. 34.12 2.30 91.58 0.00 09Nov2017 4 a.m. 33.78 2.30 91.36 0.00 09Nov2017 5 a.m. 33.73 1.40 92.64 0.00 09Nov2017 6 a.m. 32.97 2.90 91.82 0.00 09Nov2017 7 a.m. 33.06 1.70 92.69 0.00 Accuml. Values 1013.93 78.30 1739.74 1664.50 Num. Valid Values 24 24 24 24 Avg. Values 42.25 3.26 72.49 69.35 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 5.69 125.98 72.49 143.11 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2751 definition: xcompl = 1 - (RELH_avg/100) TdC = 1.1704 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 = 0.4911 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5089 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.3580 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 = 2.5131 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.7671 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.042 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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