Detailed Weather Data for Project: ARBU

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 33.98 1.19 75.00 14.00 06Dec2017 9 a.m. 35.54 0.52 77.00 83.67 06Dec2017 10 a.m. 42.26 3.52 48.75 170.75 06Dec2017 11 a.m. 45.68 9.25 36.67 242.33 06Dec2017 12 p.m. 47.07 8.44 34.50 294.75 06Dec2017 1 p.m. 48.86 7.75 32.33 385.67 06Dec2017 2 p.m. 50.90 6.71 30.75 411.50 06Dec2017 3 p.m. 52.29 5.54 29.25 327.00 06Dec2017 4 p.m. 51.57 4.53 31.25 149.00 06Dec2017 5 p.m. 48.96 3.19 35.50 44.00 06Dec2017 6 p.m. 41.36 0.22 55.00 0.00 06Dec2017 7 p.m. 34.88 3.58 73.00 0.00 06Dec2017 8 p.m. 32.81 4.14 77.00 0.00 06Dec2017 9 p.m. 36.26 6.79 60.33 0.00 06Dec2017 10 p.m. 38.43 6.99 47.00 0.00 06Dec2017 11 p.m. 36.45 3.30 52.00 0.00 07Dec2017 12 a.m. 31.10 2.57 67.25 0.00 07Dec2017 1 a.m. 25.61 2.74 82.00 0.00 07Dec2017 2 a.m. 25.34 1.90 84.25 0.00 07Dec2017 3 a.m. 27.50 6.71 78.33 0.00 07Dec2017 4 a.m. 33.89 14.88 61.50 0.00 07Dec2017 5 a.m. 32.09 14.54 67.50 0.00 07Dec2017 6 a.m. 31.10 15.94 68.50 0.00 07Dec2017 7 a.m. 29.48 13.87 69.50 0.00 Accuml. Values 913.41 148.81 1374.16 2122.67 Num. Valid Values 24 24 24 24 Avg. Values 38.06 6.20 57.26 88.44 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.37 239.44 57.26 182.51 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4274 definition: xcompl = 1 - (RELH_avg/100) TdC = -4.2723 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 = 0.4555 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5445 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.7024 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 = 3.3404 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.2209 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.082 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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