Detailed Weather Data for Project: HUGO

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 31.42 15.50 87.17 4.00 31Dec2017 9 a.m. 27.79 17.53 85.09 65.00 31Dec2017 10 a.m. 27.46 16.91 81.44 88.00 31Dec2017 11 a.m. 29.66 16.55 82.47 175.00 31Dec2017 12 p.m. 26.80 20.96 76.55 260.00 31Dec2017 1 p.m. 27.25 18.09 69.71 4390.00 31Dec2017 2 p.m. 27.14 19.75 64.28 4487.00 31Dec2017 3 p.m. 27.79 17.64 65.38 5659.00 31Dec2017 4 p.m. 27.79 18.19 55.55 5124.00 31Dec2017 5 p.m. 28.67 10.64 47.19 5943.00 31Dec2017 6 p.m. 27.81 14.11 44.93 5700.00 31Dec2017 7 p.m. 24.17 7.42 39.98 0.00 31Dec2017 8 p.m. 25.70 14.48 46.82 5599.00 31Dec2017 9 p.m. 23.85 13.80 39.25 1397.00 31Dec2017 10 p.m. 23.50 14.53 42.73 28.00 31Dec2017 11 p.m. 21.97 15.96 41.88 3581.00 01Jan2018 12 a.m. 21.20 13.03 43.47 6365.00 01Jan2018 1 a.m. 20.77 13.86 49.02 6461.00 01Jan2018 2 a.m. 19.24 11.93 48.05 6417.00 01Jan2018 3 a.m. 18.34 11.14 50.79 0.00 01Jan2018 4 a.m. 17.47 10.13 53.60 0.00 01Jan2018 5 a.m. 17.02 10.56 58.24 0.00 01Jan2018 6 a.m. 16.48 10.27 61.90 0.00 01Jan2018 7 a.m. 15.82 11.42 61.29 0.00 Accuml. Values 575.11 344.40 1396.78 61743.00 Num. Valid Values 24 24 24 24 Avg. Values 23.96 14.35 58.20 2572.63 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -4.46 554.14 58.20 5308.66 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4180 definition: xcompl = 1 - (RELH_avg/100) TdC = -11.4333 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 = 0.3357 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6643 definition: del_lambda2 = 1 - del_lambda1 Qn = 142.3012 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 = 1.8494 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.4820 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 1.972 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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