Detailed Weather Data for Project: ELDR

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. -2.54 6.40 81.82 1.50 01Jan2018 9 a.m. -1.55 6.10 77.93 108.40 01Jan2018 10 a.m. 0.39 6.60 74.28 268.80 01Jan2018 11 a.m. 2.71 5.10 66.69 404.10 01Jan2018 12 p.m. 6.31 3.60 61.18 497.50 01Jan2018 1 p.m. 9.59 2.10 53.87 521.40 01Jan2018 2 p.m. 12.15 1.50 47.32 485.30 01Jan2018 3 p.m. 14.25 1.70 44.62 316.40 01Jan2018 4 p.m. 14.97 4.00 43.38 267.00 01Jan2018 5 p.m. 15.03 6.70 43.92 102.00 01Jan2018 6 p.m. 14.09 9.70 46.73 0.00 01Jan2018 7 p.m. 20.39 3.00 39.57 0.00 01Jan2018 8 p.m. 11.12 8.20 48.18 0.00 01Jan2018 9 p.m. 11.64 7.60 48.71 0.00 01Jan2018 10 p.m. 12.58 8.00 50.54 0.00 01Jan2018 11 p.m. 11.88 6.80 53.09 0.00 02Jan2018 12 a.m. 11.66 5.60 56.61 0.00 02Jan2018 1 a.m. 11.08 7.20 52.22 0.00 02Jan2018 2 a.m. 10.80 7.00 54.66 0.00 02Jan2018 3 a.m. 10.65 7.10 59.96 0.00 02Jan2018 4 a.m. 10.42 8.00 61.53 0.00 02Jan2018 5 a.m. 9.57 8.40 63.46 0.00 02Jan2018 6 a.m. 8.74 6.70 64.87 0.00 02Jan2018 7 a.m. 7.39 4.90 65.06 0.00 Accuml. Values 233.33 142.00 1360.20 2972.40 Num. Valid Values 24 24 24 24 Avg. Values 9.72 5.92 56.67 123.85 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -12.38 228.48 56.67 255.57 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4333 definition: xcompl = 1 - (RELH_avg/100) TdC = -19.2124 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 = 0.2259 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7741 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.0340 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 = 1.0337 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.1147 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.043 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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