Detailed Weather Data for Project: FALL

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 8.56 12.90 73.69 0.50 31Dec2017 9 a.m. 7.70 12.10 72.43 129.00 31Dec2017 10 a.m. 9.19 12.20 67.63 299.20 31Dec2017 11 a.m. 10.72 12.40 63.02 273.40 31Dec2017 12 p.m. 10.92 11.60 66.12 309.40 31Dec2017 1 p.m. 12.18 12.70 63.93 513.60 31Dec2017 2 p.m. 12.63 12.30 61.31 475.60 31Dec2017 3 p.m. 13.37 12.30 58.83 344.80 31Dec2017 4 p.m. 14.05 12.80 57.29 189.00 31Dec2017 5 p.m. 13.69 12.90 57.02 55.90 31Dec2017 6 p.m. 12.38 11.00 58.18 0.00 31Dec2017 7 p.m. 10.08 0.30 46.27 0.00 31Dec2017 8 p.m. 9.73 9.00 63.64 0.00 31Dec2017 9 p.m. 8.69 10.60 66.02 0.00 31Dec2017 10 p.m. 7.23 10.00 68.97 0.00 31Dec2017 11 p.m. 5.86 9.60 72.00 0.00 01Jan2018 12 a.m. 4.44 10.10 73.54 0.00 01Jan2018 1 a.m. 3.34 10.40 74.22 0.00 01Jan2018 2 a.m. 2.39 10.20 77.72 0.00 01Jan2018 3 a.m. 1.33 9.50 77.43 0.00 01Jan2018 4 a.m. 0.48 9.70 77.68 0.00 01Jan2018 5 a.m. -0.35 10.20 78.66 0.00 01Jan2018 6 a.m. -1.16 10.20 78.52 0.00 01Jan2018 7 a.m. -1.82 8.90 78.14 0.00 Accuml. Values 175.67 253.90 1632.26 2590.40 Num. Valid Values 24 24 24 24 Avg. Values 7.32 10.58 68.01 107.93 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -13.71 408.53 68.01 222.72 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3199 definition: xcompl = 1 - (RELH_avg/100) TdC = -18.3205 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 = 0.2094 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7906 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.7302 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 = 0.6821 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.1460 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.042 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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