Detailed Weather Data for Project: CHOU

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 52.79 0.20 101.15 0.00 04Nov2017 9 a.m. 53.46 1.00 101.25 7.00 04Nov2017 10 a.m. 56.16 3.00 101.18 46.00 04Nov2017 11 a.m. 59.31 3.70 100.87 70.30 04Nov2017 12 p.m. 61.77 2.70 100.57 66.90 04Nov2017 1 p.m. 64.94 4.30 99.82 112.10 04Nov2017 2 p.m. 69.46 5.20 97.30 198.90 04Nov2017 3 p.m. 72.25 4.00 87.75 265.60 04Nov2017 4 p.m. 74.21 1.90 81.89 279.70 04Nov2017 5 p.m. 75.18 4.20 76.92 291.60 04Nov2017 6 p.m. 73.47 3.30 82.07 43.30 04Nov2017 7 p.m. 69.39 0.80 96.91 0.00 04Nov2017 8 p.m. 55.62 10.80 79.42 0.00 04Nov2017 9 p.m. 65.05 1.00 100.50 0.00 04Nov2017 10 p.m. 61.97 0.40 101.21 0.00 04Nov2017 11 p.m. 66.54 4.00 100.07 0.00 05Nov2017 12 a.m. 71.44 6.90 96.62 0.00 05Nov2017 1 a.m. 71.96 6.50 92.04 0.00 05Nov2017 2 a.m. 72.41 7.30 88.93 0.00 05Nov2017 3 a.m. 72.81 7.80 87.68 0.00 05Nov2017 4 a.m. 72.50 7.80 89.51 0.00 05Nov2017 5 a.m. 72.21 8.10 92.04 0.00 05Nov2017 6 a.m. 71.55 8.70 97.08 0.00 05Nov2017 7 a.m. 70.99 7.60 99.34 0.00 Accuml. Values 1607.41 111.20 2252.12 1381.40 Num. Valid Values 24 24 24 24 Avg. Values 66.98 4.63 93.84 57.56 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 19.43 178.92 93.84 118.77 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.0616 definition: xcompl = 1 - (RELH_avg/100) TdC = 18.3935 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 = 0.6801 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3199 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.4197 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 = 1.4142 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.2736 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.027 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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