Detailed Weather Data for Project: SARD

Date Time TAIR WSPD RELH SRAD 05Nov2017 8 a.m. 72.97 22.80 79.11 23.00 05Nov2017 9 a.m. 73.60 20.60 76.23 127.20 05Nov2017 10 a.m. 74.25 16.50 74.25 212.30 05Nov2017 11 a.m. 75.56 17.50 70.19 245.80 05Nov2017 12 p.m. 78.46 19.20 62.55 512.90 05Nov2017 1 p.m. 81.28 15.60 55.85 599.40 05Nov2017 2 p.m. 83.52 15.40 49.74 538.20 05Nov2017 3 p.m. 85.57 8.20 43.44 419.30 05Nov2017 4 p.m. 86.13 5.00 42.34 235.90 05Nov2017 5 p.m. 84.43 3.00 44.79 64.60 05Nov2017 6 p.m. 76.08 13.00 49.09 0.00 05Nov2017 7 p.m. 54.82 14.90 88.91 0.00 05Nov2017 8 p.m. 63.77 23.10 68.33 0.00 05Nov2017 9 p.m. 60.24 17.40 73.05 0.00 05Nov2017 10 p.m. 58.42 15.20 75.74 0.00 05Nov2017 11 p.m. 57.20 13.50 76.84 0.00 06Nov2017 12 a.m. 56.23 9.50 77.74 0.00 06Nov2017 1 a.m. 55.54 8.30 78.98 0.00 06Nov2017 2 a.m. 54.37 3.40 80.12 0.00 06Nov2017 3 a.m. 53.38 3.10 82.67 0.00 06Nov2017 4 a.m. 53.44 2.80 82.55 0.00 06Nov2017 5 a.m. 53.71 1.50 82.21 0.00 06Nov2017 6 a.m. 54.46 2.20 81.71 0.00 06Nov2017 7 a.m. 56.46 3.80 79.91 0.00 Accuml. Values 1603.90 275.50 1676.34 2978.60 Num. Valid Values 24 24 24 24 Avg. Values 66.83 11.48 69.85 124.11 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 19.35 443.28 69.85 256.10 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3015 definition: xcompl = 1 - (RELH_avg/100) TdC = 13.7955 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 = 0.6791 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3209 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.2058 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 = 6.6786 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 9.0694 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.174 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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