Detailed Weather Data for Project: ARBU

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 55.17 14.99 76.75 28.75 04Mar2018 9 a.m. 55.64 13.57 80.33 65.00 04Mar2018 10 a.m. 57.38 17.28 72.00 157.50 04Mar2018 11 a.m. 57.92 15.29 75.00 174.67 04Mar2018 12 p.m. 60.03 17.22 72.25 257.75 04Mar2018 1 p.m. 61.94 17.67 70.33 247.67 04Mar2018 2 p.m. 60.44 15.10 75.75 91.50 04Mar2018 3 p.m. 60.62 14.93 78.75 111.50 04Mar2018 4 p.m. 60.12 14.88 76.75 141.00 04Mar2018 5 p.m. 58.05 14.04 81.25 47.00 04Mar2018 6 p.m. 56.48 9.84 85.00 5.00 04Mar2018 7 p.m. 54.68 8.72 91.00 0.00 04Mar2018 8 p.m. 54.68 13.20 92.00 0.00 04Mar2018 9 p.m. 54.50 13.42 93.00 0.00 04Mar2018 10 p.m. 54.50 14.65 92.00 0.00 04Mar2018 11 p.m. 54.77 12.64 90.50 0.00 05Mar2018 12 a.m. 56.34 10.63 89.75 0.00 05Mar2018 1 a.m. 56.93 12.19 90.25 0.00 05Mar2018 2 a.m. 58.68 10.51 91.00 0.00 05Mar2018 3 a.m. 60.08 11.11 92.67 0.00 05Mar2018 4 a.m. 60.84 10.51 94.75 0.00 05Mar2018 5 a.m. 63.32 12.53 93.50 0.00 05Mar2018 6 a.m. 64.49 14.93 89.25 0.00 05Mar2018 7 a.m. 63.59 16.22 85.50 6.00 Accuml. Values 1401.19 326.07 2029.33 1333.34 Num. Valid Values 24 24 24 24 Avg. Values 58.38 13.59 84.56 55.56 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 14.66 524.65 84.56 114.64 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1544 definition: xcompl = 1 - (RELH_avg/100) TdC = 12.0870 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 = 0.6200 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3800 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.2527 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 = 2.5742 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.4617 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.073 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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