Detailed Weather Data for Project: HEYB

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 28.29 0.90 70.11 0.90 06Dec2017 9 a.m. 34.81 4.40 63.08 139.60 06Dec2017 10 a.m. 40.95 7.30 49.23 302.50 06Dec2017 11 a.m. 44.80 5.90 43.47 422.90 06Dec2017 12 p.m. 48.51 5.90 40.77 486.10 06Dec2017 1 p.m. 50.54 6.90 38.63 496.40 06Dec2017 2 p.m. 52.09 8.30 36.02 450.40 06Dec2017 3 p.m. 52.99 10.10 34.16 197.50 06Dec2017 4 p.m. 53.47 12.10 34.39 132.90 06Dec2017 5 p.m. 52.70 11.40 36.26 15.00 06Dec2017 6 p.m. 51.06 10.50 38.25 0.00 06Dec2017 7 p.m. 33.24 6.80 45.02 0.00 06Dec2017 8 p.m. 44.64 2.70 47.28 0.00 06Dec2017 9 p.m. 40.82 0.70 59.50 0.00 06Dec2017 10 p.m. 36.95 1.80 68.69 0.00 06Dec2017 11 p.m. 34.79 2.90 73.46 0.00 07Dec2017 12 a.m. 34.39 2.50 73.47 0.00 07Dec2017 1 a.m. 36.79 7.70 63.56 0.00 07Dec2017 2 a.m. 38.32 12.40 60.07 0.00 07Dec2017 3 a.m. 36.25 14.50 64.83 0.00 07Dec2017 4 a.m. 34.23 13.30 64.15 0.00 07Dec2017 5 a.m. 32.23 16.60 58.70 0.00 07Dec2017 6 a.m. 29.89 15.50 61.11 0.00 07Dec2017 7 a.m. 28.31 14.30 64.47 0.00 Accuml. Values 971.06 195.40 1288.68 2644.20 Num. Valid Values 24 24 24 24 Avg. Values 40.46 8.14 53.69 110.17 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.70 314.40 53.69 227.35 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4631 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.8988 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 = 0.4760 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5240 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.2100 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 = 3.9804 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.4912 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.115 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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