Detailed Weather Data for Project: SARD

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 58.98 12.30 75.91 10.40 03Dec2017 9 a.m. 59.59 11.20 74.95 89.80 03Dec2017 10 a.m. 61.21 12.50 73.35 198.60 03Dec2017 11 a.m. 64.89 13.80 66.90 303.40 03Dec2017 12 p.m. 67.57 12.50 63.41 294.70 03Dec2017 1 p.m. 69.03 12.80 61.48 396.60 03Dec2017 2 p.m. 70.63 14.10 58.09 253.30 03Dec2017 3 p.m. 72.16 16.70 54.95 182.70 03Dec2017 4 p.m. 72.66 12.90 51.66 125.60 03Dec2017 5 p.m. 71.89 8.30 51.35 21.40 03Dec2017 6 p.m. 70.20 6.70 53.75 0.00 03Dec2017 7 p.m. 63.77 16.70 79.47 0.00 03Dec2017 8 p.m. 69.22 13.50 53.23 0.00 03Dec2017 9 p.m. 68.58 16.70 54.11 0.00 03Dec2017 10 p.m. 67.50 16.50 55.74 0.00 03Dec2017 11 p.m. 66.52 14.10 56.23 0.00 04Dec2017 12 a.m. 65.55 14.30 57.24 0.00 04Dec2017 1 a.m. 65.12 17.80 60.66 0.00 04Dec2017 2 a.m. 64.35 18.50 64.46 0.00 04Dec2017 3 a.m. 63.18 17.40 70.05 0.00 04Dec2017 4 a.m. 62.02 14.80 75.28 0.00 04Dec2017 5 a.m. 61.47 15.50 79.87 0.00 04Dec2017 6 a.m. 61.05 12.00 80.71 0.00 04Dec2017 7 a.m. 60.82 14.30 86.11 0.00 Accuml. Values 1577.95 335.90 1558.96 1876.50 Num. Valid Values 24 24 24 24 Avg. Values 65.75 14.00 64.96 78.19 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 18.75 540.46 64.96 161.34 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3504 definition: xcompl = 1 - (RELH_avg/100) TdC = 12.1170 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 = 0.6719 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3281 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.9363 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 = 7.4944 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 11.6961 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.176 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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