Detailed Weather Data for Project: MCGE

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 39.87 2.68 90.00 3.00 30Dec2017 9 a.m. 40.46 4.70 87.67 22.00 30Dec2017 10 a.m. 41.09 8.50 77.75 46.00 30Dec2017 11 a.m. 39.38 13.20 77.00 49.50 30Dec2017 12 p.m. 34.74 15.04 80.50 93.75 30Dec2017 1 p.m. 32.60 15.21 83.33 73.00 30Dec2017 2 p.m. 30.83 14.93 85.00 78.50 30Dec2017 3 p.m. 30.62 16.03 82.33 116.33 30Dec2017 4 p.m. 30.14 11.04 83.00 59.67 30Dec2017 5 p.m. 29.48 9.62 82.67 21.33 30Dec2017 6 p.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 7 p.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 8 p.m. 28.40 9.62 80.50 0.00 30Dec2017 9 p.m. 28.13 7.38 80.50 0.00 30Dec2017 10 p.m. 28.00 7.83 80.25 0.00 30Dec2017 11 p.m. 28.04 7.16 80.00 0.00 31Dec2017 12 a.m. 28.49 5.14 79.00 0.00 31Dec2017 1 a.m. 28.58 5.26 78.00 0.00 31Dec2017 2 a.m. 28.58 7.16 78.00 0.00 31Dec2017 3 a.m. 28.40 7.38 79.00 0.00 31Dec2017 4 a.m. 28.76 7.83 78.00 0.00 31Dec2017 5 a.m. 27.14 13.87 75.00 0.00 31Dec2017 6 a.m. 27.14 12.75 75.00 0.00 31Dec2017 7 a.m. 22.46 15.21 79.00 0.00 Accuml. Values 681.33 217.54 1771.50 563.08 Num. Valid Values 22 22 22 22 Avg. Values 30.97 9.89 80.52 25.59 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -0.57 381.84 80.52 52.81 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1948 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.5086 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 = 0.3947 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6053 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.5754 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 = 1.1503 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.7276 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.032 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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