Detailed Weather Data for Project: ARBU

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 38.03 12.02 86.75 1.50 30Dec2017 9 a.m. 33.50 15.36 84.67 10.00 30Dec2017 10 a.m. 30.02 16.39 88.50 26.75 30Dec2017 11 a.m. 28.46 15.51 89.33 50.33 30Dec2017 12 p.m. 26.92 14.65 91.00 59.00 30Dec2017 1 p.m. 26.06 14.84 92.67 84.33 30Dec2017 2 p.m. 25.70 13.31 90.00 100.50 30Dec2017 3 p.m. 25.30 13.53 88.00 83.25 30Dec2017 4 p.m. 24.58 11.30 88.25 51.25 30Dec2017 5 p.m. 23.90 10.90 89.00 18.50 30Dec2017 6 p.m. 23.36 10.07 88.00 0.00 30Dec2017 7 p.m. 23.00 9.62 87.00 0.00 30Dec2017 8 p.m. 23.18 10.74 85.50 0.00 30Dec2017 9 p.m. 23.54 7.46 82.67 0.00 30Dec2017 10 p.m. 23.81 7.94 80.00 0.00 30Dec2017 11 p.m. 24.04 5.14 79.00 0.00 31Dec2017 12 a.m. 23.99 4.53 79.25 0.00 31Dec2017 1 a.m. 23.68 7.38 81.75 0.00 31Dec2017 2 a.m. 22.69 9.67 88.50 0.00 31Dec2017 3 a.m. 22.28 9.32 90.33 0.00 31Dec2017 4 a.m. 21.43 14.20 89.00 0.00 31Dec2017 5 a.m. 21.47 15.77 86.00 0.00 31Dec2017 6 a.m. 20.66 16.55 83.25 0.00 31Dec2017 7 a.m. 19.31 16.55 83.50 0.00 Accuml. Values 598.91 282.75 2071.92 485.41 Num. Valid Values 24 24 24 24 Avg. Values 24.95 11.78 86.33 20.23 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -3.91 454.94 86.33 41.74 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1367 definition: xcompl = 1 - (RELH_avg/100) TdC = -5.8807 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 = 0.3439 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6561 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.6856 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 = 0.6374 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.1702 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.021 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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