Detailed Weather Data for Project: WIST

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 45.50 4.15 88.46 20.00 07Nov2017 9 a.m. 45.93 3.68 88.22 34.00 07Nov2017 10 a.m. 47.25 4.02 88.34 65.00 07Nov2017 11 a.m. 47.80 3.28 87.61 117.00 07Nov2017 12 p.m. 48.36 2.33 85.30 97.00 07Nov2017 1 p.m. 48.13 4.21 88.52 108.00 07Nov2017 2 p.m. 48.02 4.78 88.83 96.00 07Nov2017 3 p.m. 47.59 5.34 85.04 64.00 07Nov2017 4 p.m. 47.35 6.30 88.40 28.00 07Nov2017 5 p.m. 46.94 4.96 87.31 15.00 07Nov2017 6 p.m. 46.26 4.97 88.64 1.00 07Nov2017 7 p.m. 47.03 0.34 77.29 0.00 07Nov2017 8 p.m. 46.27 4.37 89.45 0.00 07Nov2017 9 p.m. 46.49 4.72 89.21 1.00 07Nov2017 10 p.m. 45.82 2.88 88.64 0.00 07Nov2017 11 p.m. 45.28 2.03 89.39 0.00 08Nov2017 12 a.m. 44.62 2.52 89.87 0.00 08Nov2017 1 a.m. 44.74 0.90 89.21 1.00 08Nov2017 2 a.m. 45.27 0.85 88.77 0.00 08Nov2017 3 a.m. 45.05 2.17 88.64 0.00 08Nov2017 4 a.m. 44.51 1.34 89.50 0.00 08Nov2017 5 a.m. 44.85 2.91 89.94 0.00 08Nov2017 6 a.m. 44.94 0.45 89.26 0.00 08Nov2017 7 a.m. 45.05 0.48 84.13 1.00 Accuml. Values 1109.06 73.98 2107.97 648.00 Num. Valid Values 24 24 24 24 Avg. Values 46.21 3.08 87.83 27.00 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 7.89 119.03 87.83 55.72 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1217 definition: xcompl = 1 - (RELH_avg/100) TdC = 5.9850 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 = 0.5243 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4757 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.4831 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 = 1.3121 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.9718 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.008 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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