Detailed Weather Data for Project: WDMA

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 19.20 2.30 50.15 0.00 02Jan2018 9 a.m. 19.38 2.90 49.64 27.70 02Jan2018 10 a.m. 20.10 2.20 48.40 84.80 02Jan2018 11 a.m. 20.75 1.90 45.71 115.50 02Jan2018 12 p.m. 21.56 2.40 42.60 169.50 02Jan2018 1 p.m. 22.82 2.30 38.57 259.60 02Jan2018 2 p.m. 23.88 2.00 36.15 198.00 02Jan2018 3 p.m. 23.77 2.70 35.86 121.70 02Jan2018 4 p.m. 24.49 2.00 34.97 118.00 02Jan2018 5 p.m. 24.67 1.00 34.47 20.90 02Jan2018 6 p.m. 24.06 0.60 34.56 0.00 02Jan2018 7 p.m. 32.27 2.30 47.20 0.00 02Jan2018 8 p.m. 23.74 1.40 39.52 0.00 02Jan2018 9 p.m. 21.85 0.60 44.79 0.00 02Jan2018 10 p.m. 18.77 1.20 54.72 0.00 02Jan2018 11 p.m. 18.00 1.40 50.38 0.00 03Jan2018 12 a.m. 18.72 2.10 51.69 0.00 03Jan2018 1 a.m. 18.54 2.50 53.58 0.00 03Jan2018 2 a.m. 17.78 2.50 56.86 0.00 03Jan2018 3 a.m. 17.28 2.00 58.32 0.00 03Jan2018 4 a.m. 16.39 2.60 61.95 0.00 03Jan2018 5 a.m. 15.73 1.40 63.20 0.00 03Jan2018 6 a.m. 15.31 1.10 64.86 0.00 03Jan2018 7 a.m. 14.50 0.50 68.68 0.00 Accuml. Values 493.57 43.90 1166.83 1115.70 Num. Valid Values 24 24 24 24 Avg. Values 20.57 1.83 48.62 46.49 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -6.35 70.64 48.62 95.93 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5138 definition: xcompl = 1 - (RELH_avg/100) TdC = -15.4663 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 = 0.3079 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6921 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2547 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 = 1.9790 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.1393 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.028 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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