Detailed Weather Data for Project: CHOU

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 46.90 9.10 58.48 61.70 03Mar2018 9 a.m. 48.67 10.30 55.90 253.10 03Mar2018 10 a.m. 51.76 10.10 52.32 451.60 03Mar2018 11 a.m. 54.52 11.00 49.34 621.80 03Mar2018 12 p.m. 58.37 11.70 45.53 738.80 03Mar2018 1 p.m. 59.79 13.50 44.54 791.30 03Mar2018 2 p.m. 61.29 10.80 43.82 776.60 03Mar2018 3 p.m. 63.73 12.10 41.70 691.20 03Mar2018 4 p.m. 64.94 12.50 40.32 547.00 03Mar2018 5 p.m. 65.57 10.80 39.85 357.00 03Mar2018 6 p.m. 65.05 6.60 40.85 136.30 03Mar2018 7 p.m. 54.99 11.70 68.80 0.00 03Mar2018 8 p.m. 59.52 4.60 46.86 0.00 03Mar2018 9 p.m. 58.03 6.50 47.04 0.00 03Mar2018 10 p.m. 57.04 9.20 42.56 0.00 03Mar2018 11 p.m. 55.42 8.40 45.24 0.00 04Mar2018 12 a.m. 53.78 6.80 47.59 0.00 04Mar2018 1 a.m. 53.19 7.00 49.41 0.00 04Mar2018 2 a.m. 53.67 7.50 49.08 0.00 04Mar2018 3 a.m. 53.56 9.90 49.61 0.00 04Mar2018 4 a.m. 53.11 8.90 51.20 0.00 04Mar2018 5 a.m. 53.01 10.40 51.83 0.00 04Mar2018 6 a.m. 52.97 8.70 52.87 0.00 04Mar2018 7 a.m. 52.66 8.80 53.67 0.00 Accuml. Values 1351.54 226.90 1168.41 5426.40 Num. Valid Values 24 24 24 24 Avg. Values 56.31 9.45 48.68 226.10 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.51 365.08 48.68 466.56 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5132 definition: xcompl = 1 - (RELH_avg/100) TdC = 2.8894 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 = 0.6046 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3954 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.6855 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 = 7.9739 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 9.1910 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.255 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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