Detailed Weather Data for Project: MCGE

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 33.62 6.43 58.00 4.50 29Dec2017 9 a.m. 34.04 7.83 57.33 39.00 29Dec2017 10 a.m. 35.15 7.55 57.25 81.25 29Dec2017 11 a.m. 37.46 9.25 54.67 184.67 29Dec2017 12 p.m. 39.60 10.96 52.25 217.75 29Dec2017 1 p.m. 41.06 9.99 55.67 229.67 29Dec2017 2 p.m. 41.54 9.00 60.00 146.00 29Dec2017 3 p.m. 42.26 9.56 62.00 132.25 29Dec2017 4 p.m. 43.16 6.77 65.50 69.50 29Dec2017 5 p.m. 43.47 5.14 65.50 20.25 29Dec2017 6 p.m. 43.16 7.16 69.00 0.00 29Dec2017 7 p.m. 42.98 5.82 73.00 0.00 29Dec2017 8 p.m. 42.89 3.47 72.50 0.00 29Dec2017 9 p.m. 42.68 3.43 75.00 0.00 29Dec2017 10 p.m. 42.68 2.91 77.33 0.00 29Dec2017 11 p.m. 41.72 3.13 84.00 0.00 30Dec2017 12 a.m. 41.40 3.47 87.00 0.00 30Dec2017 1 a.m. 41.09 5.37 88.50 0.00 30Dec2017 2 a.m. 40.82 3.13 91.00 0.00 30Dec2017 3 a.m. 40.82 2.83 89.67 0.00 30Dec2017 4 a.m. 40.73 3.91 88.50 0.00 30Dec2017 5 a.m. 40.64 2.24 89.00 0.00 30Dec2017 6 a.m. 40.46 1.57 88.25 0.00 30Dec2017 7 a.m. 40.01 2.01 90.50 0.00 Accuml. Values 973.44 132.93 1751.42 1124.84 Num. Valid Values 24 24 24 24 Avg. Values 40.56 5.54 72.98 46.87 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.76 213.88 72.98 96.71 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2702 definition: xcompl = 1 - (RELH_avg/100) TdC = 0.3562 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 = 0.4768 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5232 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.1201 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 = 2.3147 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.1772 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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