Detailed Weather Data for Project: MCGE

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. 10.22 12.08 67.00 0.00 01Jan2018 9 a.m. -901.00 -901.00 -901.00 -901.00 01Jan2018 10 a.m. 13.46 11.41 62.00 309.00 01Jan2018 11 a.m. -901.00 -901.00 -901.00 -901.00 01Jan2018 12 p.m. -901.00 -901.00 -901.00 -901.00 01Jan2018 1 p.m. 20.84 11.18 47.00 573.00 01Jan2018 2 p.m. 22.69 7.94 43.00 530.25 01Jan2018 3 p.m. 23.95 7.61 40.00 426.50 01Jan2018 4 p.m. 23.84 5.97 39.33 312.33 01Jan2018 5 p.m. 23.36 7.83 39.00 187.00 01Jan2018 6 p.m. -901.00 -901.00 -901.00 -901.00 01Jan2018 7 p.m. -901.00 -901.00 -901.00 -901.00 01Jan2018 8 p.m. -901.00 -901.00 -901.00 -901.00 01Jan2018 9 p.m. -901.00 -901.00 -901.00 -901.00 01Jan2018 10 p.m. -901.00 -901.00 -901.00 -901.00 01Jan2018 11 p.m. -901.00 -901.00 -901.00 -901.00 02Jan2018 12 a.m. -901.00 -901.00 -901.00 -901.00 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. 10.76 2.91 77.00 0.00 02Jan2018 4 a.m. -901.00 -901.00 -901.00 -901.00 02Jan2018 5 a.m. 9.86 2.24 83.00 0.00 02Jan2018 6 a.m. 10.94 0.45 82.00 0.00 02Jan2018 7 a.m. 12.02 1.79 81.00 0.00 Accuml. Values 181.94 71.41 660.33 2338.08 Num. Valid Values 11 11 11 11 Avg. Values 16.54 6.49 60.03 212.55 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -8.59 250.69 60.03 438.61 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3997 definition: xcompl = 1 - (RELH_avg/100) TdC = -14.9407 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 = 0.2762 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7238 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.9017 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 = 1.2878 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.4330 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.072 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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