Detailed Weather Data for Project: BIGH

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 46.71 3.60 85.68 12.00 03Dec2017 9 a.m. 50.23 4.90 82.47 141.30 03Dec2017 10 a.m. 56.53 8.10 74.15 305.80 03Dec2017 11 a.m. 59.74 11.80 68.99 286.60 03Dec2017 12 p.m. 60.85 10.10 66.74 345.70 03Dec2017 1 p.m. 63.41 11.00 61.39 478.70 03Dec2017 2 p.m. 64.74 11.40 56.20 395.20 03Dec2017 3 p.m. 64.44 10.70 58.53 234.00 03Dec2017 4 p.m. 63.97 10.30 60.19 186.40 03Dec2017 5 p.m. 63.77 7.80 61.36 38.80 03Dec2017 6 p.m. 62.49 6.70 65.23 0.00 03Dec2017 7 p.m. 54.34 15.20 36.90 0.00 03Dec2017 8 p.m. 61.16 10.00 72.20 0.00 03Dec2017 9 p.m. 61.23 12.20 70.57 0.00 03Dec2017 10 p.m. 60.60 12.50 69.51 0.00 03Dec2017 11 p.m. 60.85 12.80 66.19 0.00 04Dec2017 12 a.m. 61.39 15.30 64.44 0.00 04Dec2017 1 a.m. 61.54 14.90 63.99 0.00 04Dec2017 2 a.m. 61.16 13.60 64.84 0.00 04Dec2017 3 a.m. 60.76 13.00 67.08 0.00 04Dec2017 4 a.m. 60.12 13.20 69.01 0.00 04Dec2017 5 a.m. 59.92 15.60 72.01 0.00 04Dec2017 6 a.m. 59.76 10.70 76.09 0.00 04Dec2017 7 a.m. 60.03 13.50 78.99 0.00 Accuml. Values 1439.74 268.90 1612.75 2424.50 Num. Valid Values 24 24 24 24 Avg. Values 59.99 11.20 67.20 101.02 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.55 432.66 67.20 208.46 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3280 definition: xcompl = 1 - (RELH_avg/100) TdC = 9.5687 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 = 0.6318 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3682 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.4054 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 = 5.7377 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.7916 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.148 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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