Detailed Weather Data for Project: WDMA

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 49.19 3.70 93.89 2.70 07Nov2017 9 a.m. 50.02 3.10 93.11 28.70 07Nov2017 10 a.m. 51.15 3.20 91.70 63.00 07Nov2017 11 a.m. 52.70 2.90 89.93 117.90 07Nov2017 12 p.m. 54.12 3.40 86.83 153.40 07Nov2017 1 p.m. 54.82 4.70 84.77 107.40 07Nov2017 2 p.m. 55.56 4.60 82.89 75.40 07Nov2017 3 p.m. 54.66 6.50 85.41 29.10 07Nov2017 4 p.m. 52.63 5.70 91.49 12.80 07Nov2017 5 p.m. 52.09 6.00 93.53 6.30 07Nov2017 6 p.m. 51.82 6.70 90.16 0.00 07Nov2017 7 p.m. 47.95 1.10 79.05 0.00 07Nov2017 8 p.m. 49.82 5.80 93.17 0.00 07Nov2017 9 p.m. 49.03 5.60 94.99 0.00 07Nov2017 10 p.m. 48.90 6.40 92.15 0.00 07Nov2017 11 p.m. 48.40 5.00 91.98 0.00 08Nov2017 12 a.m. 48.04 3.50 91.29 0.00 08Nov2017 1 a.m. 48.40 3.20 88.96 0.00 08Nov2017 2 a.m. 48.58 5.30 87.49 0.00 08Nov2017 3 a.m. 48.58 5.00 85.94 0.00 08Nov2017 4 a.m. 48.92 3.90 83.19 0.00 08Nov2017 5 a.m. 49.17 4.60 80.95 0.00 08Nov2017 6 a.m. 48.90 2.30 80.56 0.00 08Nov2017 7 a.m. 48.60 3.10 80.21 0.00 Accuml. Values 1212.04 105.30 2113.64 596.70 Num. Valid Values 24 24 24 24 Avg. Values 50.50 4.39 88.07 24.86 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 10.28 169.43 88.07 51.30 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1193 definition: xcompl = 1 - (RELH_avg/100) TdC = 8.3740 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 = 0.5592 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4408 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.5055 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 = 1.5083 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.3085 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.012 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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