Detailed Weather Data for Project: WDMA

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. 12.02 7.90 67.42 6.30 01Jan2018 9 a.m. 12.65 8.50 66.14 122.80 01Jan2018 10 a.m. 14.20 6.00 62.97 274.90 01Jan2018 11 a.m. 16.03 4.50 56.50 400.80 01Jan2018 12 p.m. 18.41 3.60 50.60 481.60 01Jan2018 1 p.m. 20.34 3.20 47.19 505.70 01Jan2018 2 p.m. 22.96 2.10 43.53 469.90 01Jan2018 3 p.m. 25.38 1.60 39.48 379.70 01Jan2018 4 p.m. 24.82 3.80 39.68 245.10 01Jan2018 5 p.m. 25.03 2.80 36.41 87.30 01Jan2018 6 p.m. 22.68 2.10 42.14 0.00 01Jan2018 7 p.m. 23.77 1.80 35.94 0.00 01Jan2018 8 p.m. 19.87 2.00 44.07 0.00 01Jan2018 9 p.m. 20.23 3.00 47.59 0.00 01Jan2018 10 p.m. 19.85 2.70 47.49 0.00 01Jan2018 11 p.m. 19.15 4.20 52.30 0.00 02Jan2018 12 a.m. 19.27 2.20 60.78 0.00 02Jan2018 1 a.m. 19.67 1.50 58.08 0.00 02Jan2018 2 a.m. 19.40 2.00 54.24 0.00 02Jan2018 3 a.m. 19.44 1.60 52.92 0.00 02Jan2018 4 a.m. 19.42 1.70 52.09 0.00 02Jan2018 5 a.m. 19.24 1.60 52.13 0.00 02Jan2018 6 a.m. 19.09 2.00 51.74 0.00 02Jan2018 7 a.m. 19.22 2.50 50.72 0.00 Accuml. Values 472.13 74.90 1212.15 2974.10 Num. Valid Values 24 24 24 24 Avg. Values 19.67 3.12 50.51 123.92 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -6.85 120.51 50.51 255.71 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4949 definition: xcompl = 1 - (RELH_avg/100) TdC = -15.4520 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 = 0.3008 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6992 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.1508 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 = 1.8335 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.3119 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.050 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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