Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 46.35 4.37 99.19 0.00 04Nov2017 9 a.m. 47.61 2.70 99.25 31.93 04Nov2017 10 a.m. 48.90 3.07 99.31 97.49 04Nov2017 11 a.m. 51.78 2.27 99.43 302.78 04Nov2017 12 p.m. 56.03 3.10 99.58 518.88 04Nov2017 1 p.m. 61.27 4.46 97.34 439.88 04Nov2017 2 p.m. 67.41 2.54 75.12 614.44 04Nov2017 3 p.m. 72.46 6.19 55.32 507.30 04Nov2017 4 p.m. 76.35 5.73 48.93 459.33 04Nov2017 5 p.m. 76.82 4.77 48.89 154.40 04Nov2017 6 p.m. 70.90 5.59 59.17 48.61 04Nov2017 7 p.m. 67.39 7.54 66.06 0.50 04Nov2017 8 p.m. 51.48 9.06 76.66 0.00 04Nov2017 9 p.m. 62.92 3.99 75.96 0.00 04Nov2017 10 p.m. 60.49 2.11 80.32 0.00 04Nov2017 11 p.m. 58.80 3.50 85.72 0.00 05Nov2017 12 a.m. 67.51 12.63 76.62 0.00 05Nov2017 1 a.m. 70.20 16.13 70.60 0.00 05Nov2017 2 a.m. 69.48 12.76 73.42 0.00 05Nov2017 3 a.m. 67.32 11.56 80.10 0.00 05Nov2017 4 a.m. 67.48 12.81 79.86 0.00 05Nov2017 5 a.m. 66.65 13.68 80.81 0.00 05Nov2017 6 a.m. 66.29 15.14 75.57 0.00 05Nov2017 7 a.m. 65.53 12.92 70.48 0.00 Accuml. Values 1517.41 178.62 1873.71 3175.54 Num. Valid Values 24 24 24 24 Avg. Values 63.23 7.44 78.07 132.31 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 17.35 287.40 78.07 273.03 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2193 definition: xcompl = 1 - (RELH_avg/100) TdC = 13.5332 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 = 0.6547 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3453 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.3217 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 = 4.2980 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.5226 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.121 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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