Detailed Weather Data for Project: CHOU

Date Time TAIR WSPD RELH SRAD 05Nov2017 8 a.m. 70.68 7.70 99.51 46.40 05Nov2017 9 a.m. 72.57 9.60 96.16 184.80 05Nov2017 10 a.m. 75.42 8.80 81.43 364.20 05Nov2017 11 a.m. 78.84 9.40 64.45 541.20 05Nov2017 12 p.m. 80.15 7.80 57.56 520.40 05Nov2017 1 p.m. 81.99 6.90 50.80 535.10 05Nov2017 2 p.m. 82.87 9.20 39.42 591.00 05Nov2017 3 p.m. 76.30 12.20 42.22 479.00 05Nov2017 4 p.m. 66.45 13.60 62.85 314.10 05Nov2017 5 p.m. 59.86 13.10 73.73 89.90 05Nov2017 6 p.m. 56.50 11.90 78.09 0.00 05Nov2017 7 p.m. 43.99 7.60 100.23 0.00 05Nov2017 8 p.m. 54.97 10.30 79.67 0.00 05Nov2017 9 p.m. 54.00 9.80 80.73 0.00 05Nov2017 10 p.m. 53.55 7.60 82.23 0.00 05Nov2017 11 p.m. 53.55 6.50 82.14 0.00 06Nov2017 12 a.m. 53.56 6.60 82.74 0.00 06Nov2017 1 a.m. 53.69 4.00 82.48 0.00 06Nov2017 2 a.m. 53.80 2.00 80.69 0.00 06Nov2017 3 a.m. 53.92 1.90 79.99 0.00 06Nov2017 4 a.m. 52.90 2.50 81.97 0.00 06Nov2017 5 a.m. 51.73 2.60 87.46 0.00 06Nov2017 6 a.m. 50.38 3.10 95.06 0.00 06Nov2017 7 a.m. 51.04 3.60 98.50 0.00 Accuml. Values 1482.69 178.30 1860.11 3666.10 Num. Valid Values 24 24 24 24 Avg. Values 61.78 7.43 77.50 152.75 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 16.54 286.88 77.50 315.21 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2250 definition: xcompl = 1 - (RELH_avg/100) TdC = 12.6426 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 = 0.6446 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3554 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.8362 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 = 4.1916 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.4186 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.134 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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