Detailed Weather Data for Project: ARBU

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. 50.45 3.41 88.00 40.50 02Dec2017 9 a.m. 54.32 6.26 81.00 156.67 02Dec2017 10 a.m. 60.12 7.89 69.50 297.50 02Dec2017 11 a.m. 63.50 6.49 65.33 355.33 02Dec2017 12 p.m. 66.60 5.14 61.50 430.75 02Dec2017 1 p.m. 68.66 4.55 57.33 448.00 02Dec2017 2 p.m. 71.69 7.10 50.75 400.00 02Dec2017 3 p.m. 74.88 8.11 44.00 352.75 02Dec2017 4 p.m. 74.25 7.89 45.25 196.75 02Dec2017 5 p.m. 71.24 6.15 50.50 71.25 02Dec2017 6 p.m. 64.22 6.49 65.00 0.00 02Dec2017 7 p.m. 61.88 2.24 73.00 0.00 02Dec2017 8 p.m. 60.98 3.80 76.00 0.00 02Dec2017 9 p.m. 59.99 3.36 78.00 0.00 02Dec2017 10 p.m. 59.24 2.39 81.33 0.00 02Dec2017 11 p.m. 57.83 5.37 85.00 0.00 03Dec2017 12 a.m. 58.91 6.38 83.50 0.00 03Dec2017 1 a.m. 58.82 6.65 84.75 0.00 03Dec2017 2 a.m. 58.91 6.21 85.25 0.00 03Dec2017 3 a.m. 59.48 6.56 84.33 0.00 03Dec2017 4 a.m. 57.51 5.70 88.75 0.00 03Dec2017 5 a.m. 57.92 7.38 88.50 0.00 03Dec2017 6 a.m. 58.34 8.13 88.00 0.00 03Dec2017 7 a.m. 57.74 7.94 89.50 0.00 Accuml. Values 1487.48 141.59 1764.07 2749.50 Num. Valid Values 24 24 24 24 Avg. Values 61.98 5.90 73.50 114.56 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 16.65 227.82 73.50 236.40 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2650 definition: xcompl = 1 - (RELH_avg/100) TdC = 11.9630 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 = 0.6460 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3540 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.8079 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 = 4.9645 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.4266 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.108 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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