Detailed Weather Data for Project: FGIB

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 56.82 0.21 86.02 1.00 04Nov2017 9 a.m. 57.92 0.03 85.41 18.00 04Nov2017 10 a.m. 62.10 0.95 79.55 56.00 04Nov2017 11 a.m. 64.40 1.89 77.17 76.00 04Nov2017 12 p.m. 66.25 2.20 71.97 113.00 04Nov2017 1 p.m. 68.79 2.06 66.30 190.00 04Nov2017 2 p.m. 74.39 1.92 58.05 327.00 04Nov2017 3 p.m. 76.37 2.29 53.85 352.00 04Nov2017 4 p.m. 74.93 1.15 57.87 296.00 04Nov2017 5 p.m. 73.96 1.97 59.71 305.00 04Nov2017 6 p.m. 71.98 2.37 64.53 42.00 04Nov2017 7 p.m. 71.10 1.96 66.73 4.00 04Nov2017 8 p.m. 57.92 0.75 57.45 0.00 04Nov2017 9 p.m. 73.40 1.01 65.87 0.00 04Nov2017 10 p.m. 75.70 5.20 58.05 0.00 04Nov2017 11 p.m. 74.62 5.41 60.68 0.00 05Nov2017 12 a.m. 73.63 7.05 61.36 0.00 05Nov2017 1 a.m. 73.83 5.25 60.49 0.00 05Nov2017 2 a.m. 74.05 4.13 59.82 0.00 05Nov2017 3 a.m. 74.17 6.03 60.50 0.00 05Nov2017 4 a.m. 73.94 5.43 61.78 0.00 05Nov2017 5 a.m. 73.96 4.93 62.52 0.00 05Nov2017 6 a.m. 73.40 4.32 64.29 0.00 05Nov2017 7 a.m. 73.40 4.19 65.01 1.00 Accuml. Values 1691.04 72.70 1564.98 1781.00 Num. Valid Values 24 24 24 24 Avg. Values 70.46 3.03 65.21 74.21 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 21.37 116.97 65.21 153.13 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3479 definition: xcompl = 1 - (RELH_avg/100) TdC = 14.6735 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 = 0.7024 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.2976 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.9215 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 = 8.7310 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.1110 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.085 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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