Detailed Weather Data for Project: COUN

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 0.88 0.80 71.74 0.40 02Jan2018 9 a.m. 2.95 2.80 67.13 73.70 02Jan2018 10 a.m. 7.57 5.00 56.99 251.90 02Jan2018 11 a.m. 10.81 5.40 47.54 262.40 02Jan2018 12 p.m. 14.50 7.10 38.86 437.30 02Jan2018 1 p.m. 17.44 8.00 34.20 479.70 02Jan2018 2 p.m. 19.99 8.80 30.39 451.70 02Jan2018 3 p.m. 21.97 7.90 28.89 357.50 02Jan2018 4 p.m. 23.23 7.80 28.53 239.60 02Jan2018 5 p.m. 22.96 7.10 30.29 85.20 02Jan2018 6 p.m. 20.75 4.60 33.97 0.00 02Jan2018 7 p.m. 23.88 2.60 58.34 0.00 02Jan2018 8 p.m. 17.87 7.50 39.89 0.00 02Jan2018 9 p.m. 19.27 9.30 39.23 0.00 02Jan2018 10 p.m. 19.08 8.70 40.01 0.00 02Jan2018 11 p.m. 19.80 9.20 39.71 0.00 03Jan2018 12 a.m. 20.75 10.70 40.76 0.00 03Jan2018 1 a.m. 20.79 12.70 42.23 0.00 03Jan2018 2 a.m. 21.18 15.70 43.62 0.00 03Jan2018 3 a.m. 21.61 15.50 46.80 0.00 03Jan2018 4 a.m. 20.62 12.80 54.75 0.00 03Jan2018 5 a.m. 19.63 11.90 60.85 0.00 03Jan2018 6 a.m. 19.31 10.40 64.42 0.00 03Jan2018 7 a.m. 19.92 9.60 68.22 0.00 Accuml. Values 426.79 201.90 1107.36 2639.40 Num. Valid Values 24 24 24 24 Avg. Values 17.78 8.41 46.14 109.97 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -7.90 324.86 46.14 226.94 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5386 definition: xcompl = 1 - (RELH_avg/100) TdC = -17.5355 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 = 0.2859 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7141 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.8620 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 = 1.8425 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.3322 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.075 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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