Detailed Weather Data for Project: HUGO

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 63.18 3.40 94.55 2.00 04Nov2017 9 a.m. 63.72 4.85 99.74 17.00 04Nov2017 10 a.m. 66.15 5.59 100.35 59.00 04Nov2017 11 a.m. 70.09 4.25 95.59 128.00 04Nov2017 12 p.m. 72.63 1.58 84.73 93.00 04Nov2017 1 p.m. 79.77 8.17 75.45 318.00 04Nov2017 2 p.m. 83.61 8.11 62.14 448.00 04Nov2017 3 p.m. 85.59 11.35 57.50 432.00 04Nov2017 4 p.m. 85.37 14.39 56.22 444.00 04Nov2017 5 p.m. 83.95 11.88 57.50 198.00 04Nov2017 6 p.m. 80.87 10.46 65.32 23.00 04Nov2017 7 p.m. 78.03 9.37 73.44 1.00 04Nov2017 8 p.m. 79.90 7.09 70.51 0.00 04Nov2017 9 p.m. 74.93 7.46 79.11 0.00 04Nov2017 10 p.m. 72.63 4.60 86.62 0.00 04Nov2017 11 p.m. 71.85 7.01 90.34 0.00 05Nov2017 12 a.m. 73.27 8.23 86.31 0.00 05Nov2017 1 a.m. 72.30 8.54 88.88 0.00 05Nov2017 2 a.m. 73.06 9.38 87.60 0.00 05Nov2017 3 a.m. 73.27 9.52 88.57 0.00 05Nov2017 4 a.m. 73.06 9.22 90.28 0.00 05Nov2017 5 a.m. 72.84 10.49 91.81 0.00 05Nov2017 6 a.m. 73.06 8.64 90.65 0.00 05Nov2017 7 a.m. 73.06 8.73 88.33 1.00 Accuml. Values 1796.16 192.31 1961.54 2164.00 Num. Valid Values 24 24 24 24 Avg. Values 74.84 8.01 81.73 90.17 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 23.80 309.43 81.73 186.06 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1827 definition: xcompl = 1 - (RELH_avg/100) TdC = 20.5305 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 = 0.7286 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.2714 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.4652 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 = 5.3165 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.7312 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.103 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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