Detailed Weather Data for Project: COUN

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 20.35 3.60 87.76 0.00 29Dec2017 9 a.m. 22.10 3.70 88.52 2.60 29Dec2017 10 a.m. 24.49 6.00 88.98 24.10 29Dec2017 11 a.m. 26.92 2.00 88.61 28.10 29Dec2017 12 p.m. 32.00 8.50 86.57 39.40 29Dec2017 1 p.m. 34.03 10.10 82.61 70.00 29Dec2017 2 p.m. 35.29 8.80 79.51 58.10 29Dec2017 3 p.m. 36.27 8.20 77.82 52.30 29Dec2017 4 p.m. 37.18 8.10 75.27 31.50 29Dec2017 5 p.m. 37.65 5.60 73.52 4.70 29Dec2017 6 p.m. 36.79 2.20 77.00 0.00 29Dec2017 7 p.m. 9.28 5.20 60.23 0.00 29Dec2017 8 p.m. 33.91 1.50 81.99 0.00 29Dec2017 9 p.m. 32.20 1.70 84.55 0.00 29Dec2017 10 p.m. 25.83 2.10 92.33 0.00 29Dec2017 11 p.m. 22.48 2.30 89.32 0.00 30Dec2017 12 a.m. 20.03 1.70 87.05 0.00 30Dec2017 1 a.m. 18.30 1.80 83.33 0.00 30Dec2017 2 a.m. 16.09 1.80 79.19 0.00 30Dec2017 3 a.m. 14.67 2.20 77.46 0.00 30Dec2017 4 a.m. 13.01 3.30 75.94 0.00 30Dec2017 5 a.m. 11.10 2.90 75.74 0.00 30Dec2017 6 a.m. 9.64 2.60 73.56 0.00 30Dec2017 7 a.m. 8.87 2.80 72.28 0.00 Accuml. Values 578.50 98.70 1939.14 310.80 Num. Valid Values 24 24 24 24 Avg. Values 24.10 4.11 80.80 12.95 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -4.39 158.81 80.80 26.72 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1920 definition: xcompl = 1 - (RELH_avg/100) TdC = -7.1912 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 = 0.3368 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6632 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.8086 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 = 0.8567 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.7685 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.009 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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