Detailed Weather Data for Project: MCGE

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. -901.00 -901.00 -901.00 -901.00 31Dec2017 9 a.m. -901.00 -901.00 -901.00 -901.00 31Dec2017 10 a.m. 21.38 14.76 79.00 73.00 31Dec2017 11 a.m. 21.02 14.32 73.00 90.00 31Dec2017 12 p.m. -901.00 -901.00 -901.00 -901.00 31Dec2017 1 p.m. 22.82 13.42 58.00 231.00 31Dec2017 2 p.m. -901.00 -901.00 -901.00 -901.00 31Dec2017 3 p.m. 24.44 14.02 42.33 183.67 31Dec2017 4 p.m. 25.97 14.99 36.00 161.50 31Dec2017 5 p.m. 25.52 13.65 35.00 158.00 31Dec2017 6 p.m. -901.00 -901.00 -901.00 -901.00 31Dec2017 7 p.m. -901.00 -901.00 -901.00 -901.00 31Dec2017 8 p.m. -901.00 -901.00 -901.00 -901.00 31Dec2017 9 p.m. -901.00 -901.00 -901.00 -901.00 31Dec2017 10 p.m. -901.00 -901.00 -901.00 -901.00 31Dec2017 11 p.m. -901.00 -901.00 -901.00 -901.00 01Jan2018 12 a.m. -901.00 -901.00 -901.00 -901.00 01Jan2018 1 a.m. -901.00 -901.00 -901.00 -901.00 01Jan2018 2 a.m. -901.00 -901.00 -901.00 -901.00 01Jan2018 3 a.m. -901.00 -901.00 -901.00 -901.00 01Jan2018 4 a.m. -901.00 -901.00 -901.00 -901.00 01Jan2018 5 a.m. -901.00 -901.00 -901.00 -901.00 01Jan2018 6 a.m. -901.00 -901.00 -901.00 -901.00 01Jan2018 7 a.m. -901.00 -901.00 -901.00 -901.00 Accuml. Values 141.15 85.16 323.33 897.17 Num. Valid Values 6 6 6 6 Avg. Values 23.53 14.19 53.89 149.53 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -4.71 548.09 53.89 308.55 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4611 definition: xcompl = 1 - (RELH_avg/100) TdC = -12.6426 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 = 0.3321 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6679 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.7250 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 = 2.0076 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.7105 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.120 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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