Detailed Weather Data for Project: JOHN

Date Time TAIR WSPD RELH SRAD 05Nov2017 8 a.m. 49.48 12.10 100.22 8.10 05Nov2017 9 a.m. 49.30 15.50 100.22 56.30 05Nov2017 10 a.m. 50.25 15.80 100.22 88.10 05Nov2017 11 a.m. 50.85 18.60 97.90 103.00 05Nov2017 12 p.m. 50.95 21.50 94.15 103.40 05Nov2017 1 p.m. 49.60 19.40 93.06 94.60 05Nov2017 2 p.m. 51.22 16.80 84.57 239.50 05Nov2017 3 p.m. 52.34 16.80 76.19 125.10 05Nov2017 4 p.m. 52.32 16.30 72.84 96.10 05Nov2017 5 p.m. 51.51 14.20 72.30 58.20 05Nov2017 6 p.m. 49.23 14.60 76.07 0.00 05Nov2017 7 p.m. 42.06 8.70 80.13 0.00 05Nov2017 8 p.m. 45.36 9.00 86.02 0.00 05Nov2017 9 p.m. 43.72 6.50 91.08 0.00 05Nov2017 10 p.m. 42.89 6.00 91.36 0.00 05Nov2017 11 p.m. 41.72 9.30 91.26 0.00 06Nov2017 12 a.m. 40.59 8.00 86.56 0.00 06Nov2017 1 a.m. 40.03 9.10 82.28 0.00 06Nov2017 2 a.m. 38.73 9.90 82.80 0.00 06Nov2017 3 a.m. 37.63 6.40 84.21 0.00 06Nov2017 4 a.m. 36.52 7.40 89.11 0.00 06Nov2017 5 a.m. 35.92 6.40 88.59 0.00 06Nov2017 6 a.m. 34.90 6.60 88.76 0.00 06Nov2017 7 a.m. 33.82 7.90 88.04 0.00 Accuml. Values 1070.94 282.80 2097.94 972.40 Num. Valid Values 24 24 24 24 Avg. Values 44.62 11.78 87.41 40.52 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 7.01 455.03 87.41 83.61 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1259 definition: xcompl = 1 - (RELH_avg/100) TdC = 5.0476 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 = 0.5111 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4889 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2172 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 = 1.2776 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.1581 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.037 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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