Detailed Weather Data for Project: CHOU

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 57.13 6.60 84.76 1.50 03Dec2017 9 a.m. 58.53 8.40 82.11 56.30 03Dec2017 10 a.m. 60.57 10.10 77.81 164.30 03Dec2017 11 a.m. 61.81 11.70 74.25 244.20 03Dec2017 12 p.m. 63.57 11.40 70.35 329.90 03Dec2017 1 p.m. 65.82 10.20 66.31 294.50 03Dec2017 2 p.m. 70.66 11.10 59.25 491.10 03Dec2017 3 p.m. 71.76 11.60 58.34 344.60 03Dec2017 4 p.m. 69.75 9.10 63.22 79.00 03Dec2017 5 p.m. 69.48 8.90 64.43 53.40 03Dec2017 6 p.m. 67.84 10.00 66.72 0.00 03Dec2017 7 p.m. 63.50 11.60 40.03 0.00 03Dec2017 8 p.m. 65.68 13.90 65.05 0.00 03Dec2017 9 p.m. 64.99 13.90 65.96 0.00 03Dec2017 10 p.m. 64.67 13.60 66.46 0.00 03Dec2017 11 p.m. 63.91 12.60 67.95 0.00 04Dec2017 12 a.m. 62.64 11.60 70.83 0.00 04Dec2017 1 a.m. 62.53 12.50 70.22 0.00 04Dec2017 2 a.m. 62.02 12.50 70.04 0.00 04Dec2017 3 a.m. 61.34 11.10 71.50 0.00 04Dec2017 4 a.m. 60.80 9.90 77.49 0.00 04Dec2017 5 a.m. 61.75 9.30 86.76 0.00 04Dec2017 6 a.m. 62.82 9.90 91.65 0.00 04Dec2017 7 a.m. 62.69 10.10 97.30 0.00 Accuml. Values 1536.26 261.60 1708.79 2058.80 Num. Valid Values 24 24 24 24 Avg. Values 64.01 10.90 71.20 85.78 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 17.78 420.91 71.20 177.02 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2880 definition: xcompl = 1 - (RELH_avg/100) TdC = 12.5776 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 = 0.6602 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3398 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.1000 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 = 5.7897 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.6941 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.132 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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