Detailed Weather Data for Project: ELDR

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 49.77 2.40 88.61 3.70 03Dec2017 9 a.m. 50.95 1.00 87.59 92.90 03Dec2017 10 a.m. 56.21 5.60 86.85 185.80 03Dec2017 11 a.m. 60.66 9.20 80.31 336.10 03Dec2017 12 p.m. 64.72 10.80 69.86 440.70 03Dec2017 1 p.m. 68.36 10.50 57.56 458.20 03Dec2017 2 p.m. 68.56 12.10 55.35 375.70 03Dec2017 3 p.m. 67.30 12.50 62.49 297.10 03Dec2017 4 p.m. 68.50 12.20 54.31 186.60 03Dec2017 5 p.m. 66.85 12.90 55.41 55.80 03Dec2017 6 p.m. 65.19 12.60 64.24 0.00 03Dec2017 7 p.m. 50.67 16.80 45.67 0.00 03Dec2017 8 p.m. 63.95 13.00 78.78 0.00 03Dec2017 9 p.m. 64.44 15.80 78.97 0.00 03Dec2017 10 p.m. 64.17 14.10 79.67 0.00 03Dec2017 11 p.m. 65.57 15.40 77.34 0.00 04Dec2017 12 a.m. 66.13 14.60 79.36 0.00 04Dec2017 1 a.m. 66.61 12.00 81.81 0.00 04Dec2017 2 a.m. 67.26 11.10 82.08 0.00 04Dec2017 3 a.m. 67.01 9.10 83.15 0.00 04Dec2017 4 a.m. 66.79 9.70 83.48 0.00 04Dec2017 5 a.m. 67.08 8.30 83.15 0.00 04Dec2017 6 a.m. 67.35 7.40 82.54 0.00 04Dec2017 7 a.m. 67.51 6.60 82.17 0.00 Accuml. Values 1531.61 255.70 1780.75 2432.60 Num. Valid Values 24 24 24 24 Avg. Values 63.82 10.65 74.20 101.36 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 17.68 411.42 74.20 209.15 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2580 definition: xcompl = 1 - (RELH_avg/100) TdC = 13.0919 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 = 0.6588 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3412 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.5049 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 = 5.1533 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.8281 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.131 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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