Detailed Weather Data for Project: JOHN

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 42.51 3.20 100.23 0.00 04Nov2017 9 a.m. 42.58 1.80 100.23 5.40 04Nov2017 10 a.m. 42.87 1.60 100.23 52.60 04Nov2017 11 a.m. 44.20 2.60 100.22 109.30 04Nov2017 12 p.m. 44.56 3.50 100.23 88.80 04Nov2017 1 p.m. 45.14 2.20 100.23 83.80 04Nov2017 2 p.m. 45.99 3.10 100.23 192.90 04Nov2017 3 p.m. 47.12 3.50 100.22 176.60 04Nov2017 4 p.m. 48.40 3.30 100.22 125.50 04Nov2017 5 p.m. 50.45 1.20 98.50 52.80 04Nov2017 6 p.m. 51.82 1.90 92.24 12.90 04Nov2017 7 p.m. 52.07 2.80 93.86 0.00 04Nov2017 8 p.m. 46.92 11.20 82.31 0.00 04Nov2017 9 p.m. 51.96 4.30 99.68 0.00 04Nov2017 10 p.m. 50.95 4.10 100.22 0.00 04Nov2017 11 p.m. 49.98 2.80 100.22 0.00 05Nov2017 12 a.m. 49.35 5.00 100.22 0.00 05Nov2017 1 a.m. 49.06 7.60 100.22 0.00 05Nov2017 2 a.m. 49.21 6.20 100.22 0.00 05Nov2017 3 a.m. 49.95 4.00 100.22 0.00 05Nov2017 4 a.m. 50.43 6.60 100.22 0.00 05Nov2017 5 a.m. 50.34 11.00 100.22 0.00 05Nov2017 6 a.m. 50.18 11.00 100.22 0.00 05Nov2017 7 a.m. 49.86 10.50 100.22 0.00 Accuml. Values 1155.92 115.00 2370.83 900.60 Num. Valid Values 24 24 24 24 Avg. Values 48.16 4.79 98.78 37.53 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 8.98 185.04 98.78 77.43 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.0122 definition: xcompl = 1 - (RELH_avg/100) TdC = 8.7903 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 = 0.5403 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4597 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2530 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 = 0.1460 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.1759 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.000 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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