Detailed Weather Data for Project: CHOU

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 27.75 11.50 95.38 0.00 30Dec2017 9 a.m. 26.08 11.30 98.59 0.00 30Dec2017 10 a.m. 25.18 13.00 98.71 11.30 30Dec2017 11 a.m. 24.48 12.80 98.56 40.50 30Dec2017 12 p.m. 24.37 11.90 95.98 60.90 30Dec2017 1 p.m. 23.83 11.50 93.19 70.30 30Dec2017 2 p.m. 23.70 11.50 88.54 80.10 30Dec2017 3 p.m. 23.50 11.40 81.08 59.30 30Dec2017 4 p.m. 23.22 12.20 77.44 36.60 30Dec2017 5 p.m. 23.00 10.10 75.70 6.70 30Dec2017 6 p.m. 22.93 8.80 73.21 0.00 30Dec2017 7 p.m. 15.98 9.40 48.58 0.00 30Dec2017 8 p.m. 23.36 5.70 72.62 0.00 30Dec2017 9 p.m. 24.19 2.40 74.08 0.00 30Dec2017 10 p.m. 24.69 1.40 75.42 0.00 30Dec2017 11 p.m. 24.87 2.60 75.61 0.00 31Dec2017 12 a.m. 24.82 5.10 74.90 0.00 31Dec2017 1 a.m. 24.71 7.00 73.76 0.00 31Dec2017 2 a.m. 21.90 10.60 65.65 0.00 31Dec2017 3 a.m. 20.71 12.40 66.10 0.00 31Dec2017 4 a.m. 16.81 16.30 78.20 0.00 31Dec2017 5 a.m. 14.95 12.60 89.51 0.00 31Dec2017 6 a.m. 15.22 10.50 77.03 0.00 31Dec2017 7 a.m. 14.88 11.40 73.24 0.00 Accuml. Values 535.13 233.40 1921.08 365.70 Num. Valid Values 24 24 24 24 Avg. Values 22.30 9.72 80.05 15.24 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -5.39 375.54 80.05 31.44 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1995 definition: xcompl = 1 - (RELH_avg/100) TdC = -8.2899 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 = 0.3220 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6780 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.7736 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 = 0.8247 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.2737 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.024 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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