Detailed Weather Data for Project: COUN

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. 35.91 1.80 91.26 7.60 02Dec2017 9 a.m. 38.59 0.10 87.98 124.40 02Dec2017 10 a.m. 42.10 1.50 85.05 267.80 02Dec2017 11 a.m. 47.34 4.00 74.31 383.60 02Dec2017 12 p.m. 54.77 0.40 56.43 454.60 02Dec2017 1 p.m. 57.99 1.60 50.30 471.40 02Dec2017 2 p.m. 61.63 1.10 45.10 430.40 02Dec2017 3 p.m. 64.11 1.60 40.54 339.60 02Dec2017 4 p.m. 63.23 1.30 42.77 207.50 02Dec2017 5 p.m. 62.31 1.40 42.59 53.00 02Dec2017 6 p.m. 60.13 2.10 45.76 0.00 02Dec2017 7 p.m. 61.63 11.80 62.42 0.00 02Dec2017 8 p.m. 50.77 2.10 63.39 0.00 02Dec2017 9 p.m. 46.76 2.50 72.52 0.00 02Dec2017 10 p.m. 46.13 1.90 84.89 0.00 02Dec2017 11 p.m. 44.67 1.30 85.85 0.00 03Dec2017 12 a.m. 44.22 0.50 83.79 0.00 03Dec2017 1 a.m. 41.95 0.90 87.51 0.00 03Dec2017 2 a.m. 38.16 3.30 90.14 0.00 03Dec2017 3 a.m. 35.87 3.60 91.83 0.00 03Dec2017 4 a.m. 36.99 3.20 92.79 0.00 03Dec2017 5 a.m. 39.81 0.60 92.71 0.00 03Dec2017 6 a.m. 41.34 1.60 91.44 0.00 03Dec2017 7 a.m. 38.61 1.30 94.99 0.00 Accuml. Values 1155.02 51.50 1756.36 2739.90 Num. Valid Values 24 24 24 24 Avg. Values 48.13 2.15 73.18 114.16 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 8.96 82.86 73.18 235.58 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2682 definition: xcompl = 1 - (RELH_avg/100) TdC = 4.4582 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 = 0.5400 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4600 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.4590 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 = 3.0555 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.7645 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.063 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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