Detailed Weather Data for Project: HEYB

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 15.91 11.30 60.06 1.30 31Dec2017 9 a.m. 15.84 11.80 58.11 51.00 31Dec2017 10 a.m. 15.67 13.20 56.61 177.50 31Dec2017 11 a.m. 16.41 13.00 50.61 378.50 31Dec2017 12 p.m. 17.65 12.80 48.10 488.40 31Dec2017 1 p.m. 18.66 12.50 45.28 487.80 31Dec2017 2 p.m. 19.81 13.10 39.08 503.20 31Dec2017 3 p.m. 20.75 12.40 35.77 311.60 31Dec2017 4 p.m. 20.66 13.00 36.66 136.10 31Dec2017 5 p.m. 19.90 13.00 38.30 31.00 31Dec2017 6 p.m. 18.73 10.40 43.69 0.00 31Dec2017 7 p.m. 15.08 3.70 41.74 0.00 31Dec2017 8 p.m. 16.38 8.70 48.71 0.00 31Dec2017 9 p.m. 15.69 8.90 50.26 0.00 31Dec2017 10 p.m. 14.74 11.50 49.10 0.00 31Dec2017 11 p.m. 13.77 10.10 50.98 0.00 01Jan2018 12 a.m. 12.60 10.40 53.44 0.00 01Jan2018 1 a.m. 11.46 8.90 55.53 0.00 01Jan2018 2 a.m. 10.60 8.10 57.64 0.00 01Jan2018 3 a.m. 9.86 7.80 59.67 0.00 01Jan2018 4 a.m. 8.91 8.60 63.38 0.00 01Jan2018 5 a.m. 7.90 9.00 65.97 0.00 01Jan2018 6 a.m. 7.03 9.40 68.65 0.00 01Jan2018 7 a.m. 6.08 7.10 68.30 0.00 Accuml. Values 350.09 248.70 1245.64 2566.40 Num. Valid Values 24 24 24 24 Avg. Values 14.59 10.36 51.90 106.93 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -9.67 400.16 51.90 220.66 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4810 definition: xcompl = 1 - (RELH_avg/100) TdC = -17.7433 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 = 0.2613 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7387 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.7726 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 = 1.4283 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.1629 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.071 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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