Detailed Weather Data for Project: MCGE

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 63.95 7.94 89.50 48.50 05Mar2018 9 a.m. 65.24 19.16 66.67 223.67 05Mar2018 10 a.m. 58.19 22.37 48.75 531.25 05Mar2018 11 a.m. 60.26 24.01 40.33 654.67 05Mar2018 12 p.m. 62.24 20.80 34.50 733.25 05Mar2018 1 p.m. 63.08 21.10 30.00 746.00 05Mar2018 2 p.m. 63.72 21.14 28.75 787.00 05Mar2018 3 p.m. 64.31 20.19 25.25 743.25 05Mar2018 4 p.m. 62.87 17.84 25.00 423.00 05Mar2018 5 p.m. 61.56 14.60 24.00 252.00 05Mar2018 6 p.m. 58.64 11.63 25.00 41.00 05Mar2018 7 p.m. 52.34 5.37 36.00 0.00 05Mar2018 8 p.m. 48.02 2.68 48.00 0.00 05Mar2018 9 p.m. 47.03 3.80 49.00 0.00 05Mar2018 10 p.m. 42.44 3.95 70.00 0.00 05Mar2018 11 p.m. 39.02 2.24 80.50 0.00 06Mar2018 12 a.m. 36.99 0.78 86.25 0.00 06Mar2018 1 a.m. 35.55 0.67 88.25 0.00 06Mar2018 2 a.m. 33.93 1.06 94.25 0.00 06Mar2018 3 a.m. 32.12 2.09 94.00 0.00 06Mar2018 4 a.m. 31.28 1.85 94.00 0.00 06Mar2018 5 a.m. 30.47 2.13 93.50 0.00 06Mar2018 6 a.m. 31.64 5.03 83.75 0.00 06Mar2018 7 a.m. 31.46 3.47 85.50 9.00 Accuml. Values 1176.35 235.90 1440.75 5192.59 Num. Valid Values 24 24 24 24 Avg. Values 49.01 9.83 60.03 216.36 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 9.45 379.56 60.03 446.46 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 = 2.1274 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 = 0.5473 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4527 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.0856 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 = 4.7250 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.9638 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.194 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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