Detailed Weather Data for Project: COUN

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 34.52 3.40 76.77 47.50 07Nov2017 9 a.m. 35.69 3.40 73.60 280.00 07Nov2017 10 a.m. 36.12 3.20 72.14 172.60 07Nov2017 11 a.m. 36.88 2.90 70.46 361.20 07Nov2017 12 p.m. 40.48 2.50 65.78 380.30 07Nov2017 1 p.m. 42.82 5.10 61.38 337.10 07Nov2017 2 p.m. 43.30 9.90 51.11 203.50 07Nov2017 3 p.m. 44.20 11.30 40.41 81.10 07Nov2017 4 p.m. 43.70 14.10 40.57 33.50 07Nov2017 5 p.m. 43.63 14.00 42.88 4.30 07Nov2017 6 p.m. 42.71 9.80 43.16 0.00 07Nov2017 7 p.m. 45.39 2.50 41.42 0.00 07Nov2017 8 p.m. 39.85 0.70 53.33 0.00 07Nov2017 9 p.m. 37.38 0.90 60.01 0.00 07Nov2017 10 p.m. 36.23 0.70 63.31 0.00 07Nov2017 11 p.m. 35.38 0.70 66.17 0.00 08Nov2017 12 a.m. 34.79 0.90 68.90 0.00 08Nov2017 1 a.m. 34.02 1.10 69.38 0.00 08Nov2017 2 a.m. 34.09 1.00 68.11 0.00 08Nov2017 3 a.m. 33.06 0.70 72.86 0.00 08Nov2017 4 a.m. 32.31 1.10 77.93 0.00 08Nov2017 5 a.m. 32.27 1.00 80.02 0.00 08Nov2017 6 a.m. 32.11 0.90 81.49 0.00 08Nov2017 7 a.m. 31.01 0.70 84.28 0.00 Accuml. Values 901.94 92.50 1525.47 1901.10 Num. Valid Values 24 24 24 24 Avg. Values 37.58 3.85 63.56 79.21 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.10 148.83 63.56 163.46 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3644 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.1061 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 = 0.4514 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5486 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.5043 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 = 2.7855 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.0978 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.054 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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