Detailed Weather Data for Project: BIGH

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 26.28 1.90 59.21 17.30 06Dec2017 9 a.m. 28.51 2.60 58.39 183.30 06Dec2017 10 a.m. 34.47 4.20 48.57 354.40 06Dec2017 11 a.m. 39.18 4.40 43.34 483.50 06Dec2017 12 p.m. 43.68 9.20 34.60 559.90 06Dec2017 1 p.m. 45.86 10.60 30.67 573.40 06Dec2017 2 p.m. 46.44 9.80 30.92 510.00 06Dec2017 3 p.m. 46.83 14.70 30.03 313.20 06Dec2017 4 p.m. 46.83 13.50 25.48 225.80 06Dec2017 5 p.m. 45.97 10.10 23.95 69.30 06Dec2017 6 p.m. 42.87 5.20 28.63 0.00 06Dec2017 7 p.m. 25.54 2.70 39.49 0.00 06Dec2017 8 p.m. 38.30 2.30 34.14 0.00 06Dec2017 9 p.m. 37.08 5.00 36.17 0.00 06Dec2017 10 p.m. 35.74 5.40 43.17 0.00 06Dec2017 11 p.m. 33.62 4.50 52.12 0.00 07Dec2017 12 a.m. 31.80 5.00 57.04 0.00 07Dec2017 1 a.m. 28.40 5.90 49.05 0.00 07Dec2017 2 a.m. 26.33 7.60 50.59 0.00 07Dec2017 3 a.m. 24.42 7.90 51.96 0.00 07Dec2017 4 a.m. 22.08 7.60 56.88 0.00 07Dec2017 5 a.m. 20.64 7.30 60.30 0.00 07Dec2017 6 a.m. 19.44 5.30 63.23 0.00 07Dec2017 7 a.m. 18.16 5.50 66.45 0.00 Accuml. Values 808.46 158.20 1074.38 3290.10 Num. Valid Values 24 24 24 24 Avg. Values 33.69 6.59 44.77 137.09 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 0.94 254.54 44.77 282.88 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5523 definition: xcompl = 1 - (RELH_avg/100) TdC = -9.8165 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 = 0.4180 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5820 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.6645 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 = 3.6575 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.6256 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.110 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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