Detailed Weather Data for Project: BIGH

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. 33.33 8.90 71.97 24.10 08Nov2017 9 a.m. 33.76 8.20 69.24 160.50 08Nov2017 10 a.m. 36.23 6.70 64.02 426.90 08Nov2017 11 a.m. 39.40 6.70 59.82 538.40 08Nov2017 12 p.m. 42.96 4.20 53.76 604.50 08Nov2017 1 p.m. 45.00 5.70 47.39 609.50 08Nov2017 2 p.m. 46.54 7.70 41.50 552.50 08Nov2017 3 p.m. 48.13 6.50 37.75 437.80 08Nov2017 4 p.m. 49.14 6.20 33.38 280.40 08Nov2017 5 p.m. 49.46 4.40 33.38 94.90 08Nov2017 6 p.m. 46.53 2.40 44.09 0.00 08Nov2017 7 p.m. 47.95 7.40 48.49 0.00 08Nov2017 8 p.m. 40.24 1.30 68.86 0.00 08Nov2017 9 p.m. 37.35 1.20 75.46 0.00 08Nov2017 10 p.m. 35.44 1.00 85.22 0.00 08Nov2017 11 p.m. 35.78 1.10 90.22 0.00 09Nov2017 12 a.m. 34.52 0.40 91.96 0.00 09Nov2017 1 a.m. 33.76 0.40 92.50 0.00 09Nov2017 2 a.m. 33.03 0.50 86.55 0.00 09Nov2017 3 a.m. 36.36 0.60 71.97 0.00 09Nov2017 4 a.m. 34.95 1.20 73.23 0.00 09Nov2017 5 a.m. 32.25 2.30 80.14 0.00 09Nov2017 6 a.m. 31.01 2.70 82.03 0.00 09Nov2017 7 a.m. 31.08 1.40 84.00 0.00 Accuml. Values 934.19 89.10 1586.93 3729.50 Num. Valid Values 24 24 24 24 Avg. Values 38.92 3.71 66.12 155.40 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.85 143.36 66.12 320.66 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3388 definition: xcompl = 1 - (RELH_avg/100) TdC = -1.8581 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 = 0.4629 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5371 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.2018 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 = 2.7259 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.0199 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.083 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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