Detailed Weather Data for Project: HUGO

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 57.90 7.27 91.56 45.00 03Dec2017 9 a.m. 60.66 8.04 84.98 158.00 03Dec2017 10 a.m. 66.90 8.95 73.56 266.00 03Dec2017 11 a.m. 69.33 8.73 68.43 279.00 03Dec2017 12 p.m. 72.41 11.23 60.86 565.00 03Dec2017 1 p.m. 77.13 8.71 52.44 454.00 03Dec2017 2 p.m. 78.89 10.71 49.38 559.00 03Dec2017 3 p.m. 77.13 12.64 49.87 238.00 03Dec2017 4 p.m. 77.02 10.64 48.10 152.00 03Dec2017 5 p.m. 74.93 9.74 51.46 35.00 03Dec2017 6 p.m. 73.17 10.21 53.47 0.00 03Dec2017 7 p.m. 74.05 8.26 73.07 0.00 03Dec2017 8 p.m. 69.76 10.83 58.11 0.00 03Dec2017 9 p.m. 69.33 10.41 58.60 0.00 03Dec2017 10 p.m. 68.23 11.65 60.19 0.00 03Dec2017 11 p.m. 66.27 10.92 62.70 0.00 04Dec2017 12 a.m. 64.06 9.15 66.35 0.00 04Dec2017 1 a.m. 62.96 8.69 71.91 0.00 04Dec2017 2 a.m. 62.85 9.45 75.76 0.00 04Dec2017 3 a.m. 62.73 8.41 80.82 0.00 04Dec2017 4 a.m. 62.40 8.90 83.20 0.00 04Dec2017 5 a.m. 63.18 6.92 89.49 0.00 04Dec2017 6 a.m. 63.50 9.17 90.95 0.00 04Dec2017 7 a.m. 63.61 8.80 92.05 0.00 Accuml. Values 1638.39 228.43 1647.31 2751.00 Num. Valid Values 24 24 24 24 Avg. Values 68.27 9.52 68.64 114.63 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 20.15 367.54 68.64 236.53 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3136 definition: xcompl = 1 - (RELH_avg/100) TdC = 14.2961 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 = 0.6885 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3115 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.9836 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 = 7.2970 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.5418 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.159 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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