Detailed Weather Data for Project: BIGH

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. -4.54 4.00 65.23 3.50 01Jan2018 9 a.m. -3.42 4.20 64.19 135.10 01Jan2018 10 a.m. -1.44 4.10 63.01 317.20 01Jan2018 11 a.m. 0.14 5.60 60.69 464.90 01Jan2018 12 p.m. 2.28 4.10 54.65 558.20 01Jan2018 1 p.m. 4.51 2.70 49.67 585.30 01Jan2018 2 p.m. 6.60 4.30 44.84 544.10 01Jan2018 3 p.m. 8.53 3.70 42.05 453.20 01Jan2018 4 p.m. 10.71 2.40 38.83 304.80 01Jan2018 5 p.m. 10.90 7.10 39.55 108.60 01Jan2018 6 p.m. 10.27 6.40 40.28 0.00 01Jan2018 7 p.m. 16.03 0.90 40.02 0.00 01Jan2018 8 p.m. 9.09 7.90 42.25 0.00 01Jan2018 9 p.m. 8.44 7.50 44.64 0.00 01Jan2018 10 p.m. 7.54 7.70 46.50 0.00 01Jan2018 11 p.m. 7.14 9.60 47.56 0.00 02Jan2018 12 a.m. 6.76 7.80 47.34 0.00 02Jan2018 1 a.m. 6.75 7.20 49.46 0.00 02Jan2018 2 a.m. 6.49 6.60 50.37 0.00 02Jan2018 3 a.m. 5.79 6.70 52.76 0.00 02Jan2018 4 a.m. 5.22 7.40 54.95 0.00 02Jan2018 5 a.m. 4.57 7.30 56.26 0.00 02Jan2018 6 a.m. 4.39 7.10 56.02 0.00 02Jan2018 7 a.m. 3.94 6.20 57.18 0.00 Accuml. Values 136.69 138.50 1208.30 3474.90 Num. Valid Values 24 24 24 24 Avg. Values 5.70 5.77 50.35 144.79 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -14.61 222.85 50.35 298.77 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4965 definition: xcompl = 1 - (RELH_avg/100) TdC = -22.6995 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 = 0.1986 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.8014 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.3771 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 = 0.9883 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.0553 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.044 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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