Detailed Weather Data for Project: CHEN

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 26.71 16.75 52.39 9.00 05Dec2017 9 a.m. 28.02 15.86 54.40 137.00 05Dec2017 10 a.m. 34.29 14.92 47.37 375.00 05Dec2017 11 a.m. 37.15 19.69 40.91 502.00 05Dec2017 12 p.m. 40.12 15.70 32.97 571.00 05Dec2017 1 p.m. 42.75 16.69 34.55 576.00 05Dec2017 2 p.m. 44.83 18.29 35.35 515.00 05Dec2017 3 p.m. 45.61 23.00 37.91 394.00 05Dec2017 4 p.m. 46.15 20.49 33.27 233.00 05Dec2017 5 p.m. 45.93 12.23 34.25 41.00 05Dec2017 6 p.m. 42.42 7.63 37.61 0.00 05Dec2017 7 p.m. 38.79 16.67 58.67 0.00 05Dec2017 8 p.m. 37.26 7.66 34.55 0.00 05Dec2017 9 p.m. 37.90 9.85 41.09 0.00 05Dec2017 10 p.m. 36.93 11.38 42.43 0.00 05Dec2017 11 p.m. 38.46 17.97 41.70 0.00 06Dec2017 12 a.m. 38.79 18.90 44.14 0.00 06Dec2017 1 a.m. 40.23 13.94 44.99 0.00 06Dec2017 2 a.m. 36.05 10.74 48.47 0.00 06Dec2017 3 a.m. 36.93 10.26 53.11 0.00 06Dec2017 4 a.m. 36.93 13.98 51.53 0.00 06Dec2017 5 a.m. 36.50 13.12 57.46 0.00 06Dec2017 6 a.m. 35.17 8.96 56.97 0.00 06Dec2017 7 a.m. 33.08 9.72 61.79 0.00 Accuml. Values 916.99 344.40 1077.88 3353.00 Num. Valid Values 24 24 24 24 Avg. Values 38.21 14.35 44.91 139.71 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.45 554.14 44.91 288.29 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5509 definition: xcompl = 1 - (RELH_avg/100) TdC = -7.4756 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 = 0.4568 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5432 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.8232 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 = 4.3595 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.4055 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.191 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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