Detailed Weather Data for Project: HEYB

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 43.81 7.30 90.14 1.20 07Nov2017 9 a.m. 43.72 9.10 89.59 41.80 07Nov2017 10 a.m. 44.02 8.70 88.47 60.30 07Nov2017 11 a.m. 44.35 8.60 87.85 52.70 07Nov2017 12 p.m. 44.74 10.20 87.49 83.40 07Nov2017 1 p.m. 45.19 11.40 86.12 70.30 07Nov2017 2 p.m. 44.76 11.60 87.80 76.60 07Nov2017 3 p.m. 44.74 11.40 86.76 54.60 07Nov2017 4 p.m. 45.03 10.00 85.15 38.60 07Nov2017 5 p.m. 46.11 8.90 81.28 2.10 07Nov2017 6 p.m. 47.07 8.30 75.51 0.00 07Nov2017 7 p.m. 45.73 0.50 73.45 0.00 07Nov2017 8 p.m. 47.08 11.20 70.05 0.00 07Nov2017 9 p.m. 45.82 11.20 74.02 0.00 07Nov2017 10 p.m. 44.85 11.60 76.88 0.00 07Nov2017 11 p.m. 44.74 8.50 76.33 0.00 08Nov2017 12 a.m. 44.62 9.00 71.40 0.00 08Nov2017 1 a.m. 44.56 9.50 68.90 0.00 08Nov2017 2 a.m. 44.56 8.60 67.60 0.00 08Nov2017 3 a.m. 44.58 6.60 67.66 0.00 08Nov2017 4 a.m. 44.51 5.30 68.71 0.00 08Nov2017 5 a.m. 44.51 5.90 69.38 0.00 08Nov2017 6 a.m. 44.42 7.80 70.87 0.00 08Nov2017 7 a.m. 44.02 7.70 69.82 0.00 Accuml. Values 1077.58 208.90 1871.23 481.60 Num. Valid Values 24 24 24 24 Avg. Values 44.90 8.70 77.97 20.07 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 7.17 336.12 77.97 41.41 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2203 definition: xcompl = 1 - (RELH_avg/100) TdC = 3.6032 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 = 0.5134 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4866 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.6282 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 = 2.2302 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.8252 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.041 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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