Detailed Weather Data for Project: MCGE

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 42.26 15.83 49.00 17.50 05Dec2017 9 a.m. 42.38 15.43 46.67 76.33 05Dec2017 10 a.m. 42.17 17.11 41.25 96.75 05Dec2017 11 a.m. 42.20 13.27 39.67 102.67 05Dec2017 12 p.m. 42.66 13.98 35.50 182.25 05Dec2017 1 p.m. 43.40 13.42 32.00 194.33 05Dec2017 2 p.m. 43.88 11.93 32.33 223.00 05Dec2017 3 p.m. 44.28 11.74 31.50 218.75 05Dec2017 4 p.m. -901.00 -901.00 -901.00 -901.00 05Dec2017 5 p.m. -901.00 -901.00 -901.00 -901.00 05Dec2017 6 p.m. -901.00 -901.00 -901.00 -901.00 05Dec2017 7 p.m. -901.00 -901.00 -901.00 -901.00 05Dec2017 8 p.m. 38.30 0.67 71.00 0.00 05Dec2017 9 p.m. 39.56 1.79 79.00 0.00 05Dec2017 10 p.m. 39.29 2.01 75.50 0.00 05Dec2017 11 p.m. 39.11 3.58 66.00 0.00 06Dec2017 12 a.m. 38.21 1.62 67.50 0.00 06Dec2017 1 a.m. 36.09 2.35 79.75 0.00 06Dec2017 2 a.m. 34.07 1.23 80.25 0.00 06Dec2017 3 a.m. 33.26 3.36 90.00 0.00 06Dec2017 4 a.m. 34.88 4.64 74.75 0.00 06Dec2017 5 a.m. 35.51 3.02 73.00 0.00 06Dec2017 6 a.m. 35.87 2.46 72.25 0.00 06Dec2017 7 a.m. 35.24 0.22 80.00 0.00 Accuml. Values 782.62 139.66 1216.92 1111.58 Num. Valid Values 20 20 20 20 Avg. Values 39.13 6.98 60.85 55.58 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.96 269.66 60.85 114.69 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3915 definition: xcompl = 1 - (RELH_avg/100) TdC = -2.8815 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 = 0.4646 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5354 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.0418 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 = 3.1833 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.3299 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.071 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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