Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 05Nov2017 8 a.m. 64.44 7.80 69.89 68.41 05Nov2017 9 a.m. 65.50 9.50 62.96 251.39 05Nov2017 10 a.m. 66.94 13.62 50.33 429.34 05Nov2017 11 a.m. 66.11 15.94 46.62 549.37 05Nov2017 12 p.m. 62.24 15.22 60.46 616.32 05Nov2017 1 p.m. 60.17 12.23 67.18 610.37 05Nov2017 2 p.m. 57.81 9.80 72.13 285.02 05Nov2017 3 p.m. 58.68 9.70 69.60 212.52 05Nov2017 4 p.m. 57.88 8.99 70.83 83.80 05Nov2017 5 p.m. 56.07 9.60 72.78 16.45 05Nov2017 6 p.m. 53.53 9.02 74.44 0.00 05Nov2017 7 p.m. 45.37 5.33 74.48 0.00 05Nov2017 8 p.m. 50.47 9.34 77.78 0.00 05Nov2017 9 p.m. 49.59 6.45 79.36 0.00 05Nov2017 10 p.m. 49.37 7.16 78.02 0.00 05Nov2017 11 p.m. 47.79 5.19 81.16 0.00 06Nov2017 12 a.m. 46.20 4.74 84.63 0.00 06Nov2017 1 a.m. 45.36 3.41 85.11 0.00 06Nov2017 2 a.m. 44.38 4.82 86.75 0.00 06Nov2017 3 a.m. 44.04 4.67 87.03 0.00 06Nov2017 4 a.m. 44.28 4.88 84.75 0.00 06Nov2017 5 a.m. 44.60 4.22 83.57 0.00 06Nov2017 6 a.m. 44.69 5.06 83.15 0.00 06Nov2017 7 a.m. 44.78 5.90 83.45 0.00 Accuml. Values 1270.27 192.59 1786.46 3122.99 Num. Valid Values 24 24 24 24 Avg. Values 52.93 8.02 74.44 130.12 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 11.63 309.88 74.44 268.51 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2556 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.2809 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 = 0.5785 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4215 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.9658 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 = 3.4738 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.9449 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.110 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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