Detailed Weather Data for Project: HUGO

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. 15.39 8.47 61.72 20.00 01Jan2018 9 a.m. 16.16 9.80 55.92 185.00 01Jan2018 10 a.m. 18.12 8.94 53.41 365.00 01Jan2018 11 a.m. 21.09 8.36 51.53 513.00 01Jan2018 12 p.m. 23.85 9.81 47.12 599.00 01Jan2018 1 p.m. 26.69 6.11 39.80 617.00 01Jan2018 2 p.m. 26.37 7.42 32.60 546.00 01Jan2018 3 p.m. 27.81 6.60 35.53 455.00 01Jan2018 4 p.m. 27.46 6.09 33.21 290.00 01Jan2018 5 p.m. 27.57 7.35 35.28 96.00 01Jan2018 6 p.m. 26.04 6.77 38.03 1.00 01Jan2018 7 p.m. 24.17 7.42 39.98 0.00 01Jan2018 8 p.m. 22.41 4.98 42.06 0.00 01Jan2018 9 p.m. 21.43 4.51 47.56 0.00 01Jan2018 10 p.m. 20.43 4.89 51.28 1.00 01Jan2018 11 p.m. 19.33 1.64 55.00 0.00 02Jan2018 12 a.m. 18.79 1.96 57.26 0.00 02Jan2018 1 a.m. -901.00 -901.00 -901.00 -901.00 02Jan2018 2 a.m. -901.00 -901.00 -901.00 -901.00 02Jan2018 3 a.m. -901.00 -901.00 -901.00 -901.00 02Jan2018 4 a.m. -901.00 -901.00 -901.00 -901.00 02Jan2018 5 a.m. -901.00 -901.00 -901.00 -901.00 02Jan2018 6 a.m. -901.00 -901.00 -901.00 -901.00 02Jan2018 7 a.m. -901.00 -901.00 -901.00 -901.00 Accuml. Values 383.10 111.12 777.29 3688.00 Num. Valid Values 17 17 17 17 Avg. Values 22.54 6.54 45.72 216.94 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -5.26 252.41 45.72 447.66 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5428 definition: xcompl = 1 - (RELH_avg/100) TdC = -15.2228 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 = 0.3239 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6761 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.1582 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 = 2.2748 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.3744 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.103 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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