Detailed Weather Data for Project: ARBU

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 57.42 5.70 90.25 23.75 03Dec2017 9 a.m. 59.42 7.38 86.00 107.67 03Dec2017 10 a.m. 63.86 12.02 74.75 394.75 03Dec2017 11 a.m. 65.66 12.23 70.33 290.00 03Dec2017 12 p.m. 65.57 9.79 71.25 179.50 03Dec2017 1 p.m. 69.68 7.98 65.67 253.67 03Dec2017 2 p.m. 74.48 12.25 56.75 365.50 03Dec2017 3 p.m. 75.74 15.49 51.50 339.50 03Dec2017 4 p.m. 75.51 13.09 51.00 228.25 03Dec2017 5 p.m. 73.22 14.65 57.25 81.75 03Dec2017 6 p.m. 69.26 12.75 68.00 0.00 03Dec2017 7 p.m. 67.28 12.30 76.00 0.00 03Dec2017 8 p.m. 66.92 15.43 79.00 0.00 03Dec2017 9 p.m. 66.02 13.20 84.00 0.00 03Dec2017 10 p.m. 66.02 15.10 84.50 0.00 03Dec2017 11 p.m. 65.21 15.04 81.25 0.00 04Dec2017 12 a.m. 63.63 13.87 80.00 0.00 04Dec2017 1 a.m. 62.87 13.92 82.50 0.00 04Dec2017 2 a.m. 63.59 14.60 87.00 0.00 04Dec2017 3 a.m. 64.46 16.25 88.00 0.00 04Dec2017 4 a.m. 64.98 15.88 88.00 0.00 04Dec2017 5 a.m. 63.86 14.76 93.50 0.00 04Dec2017 6 a.m. 64.71 14.65 90.50 0.00 04Dec2017 7 a.m. 65.57 13.31 88.50 0.00 Accuml. Values 1594.94 311.64 1845.50 2264.34 Num. Valid Values 24 24 24 24 Avg. Values 66.46 12.98 76.90 94.35 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 19.14 501.43 76.90 194.69 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2310 definition: xcompl = 1 - (RELH_avg/100) TdC = 15.0509 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 = 0.6766 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3234 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.3807 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 = 5.0567 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.8020 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.136 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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