Detailed Weather Data for Project: TRUS

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 40.03 10.79 28.94 0.00 05Dec2017 9 a.m. 40.57 7.01 30.71 28.00 05Dec2017 10 a.m. 42.42 8.24 29.19 87.00 05Dec2017 11 a.m. 43.86 11.36 25.71 206.00 05Dec2017 12 p.m. 44.42 9.02 26.26 225.00 05Dec2017 1 p.m. 45.73 7.47 25.65 225.00 05Dec2017 2 p.m. 45.73 8.95 26.26 246.00 05Dec2017 3 p.m. 45.19 8.04 27.48 297.00 05Dec2017 4 p.m. 44.62 7.52 26.19 112.00 05Dec2017 5 p.m. 44.29 5.01 27.05 38.00 05Dec2017 6 p.m. 43.63 1.89 26.74 8.00 05Dec2017 7 p.m. 49.24 2.46 28.27 0.00 05Dec2017 8 p.m. 43.75 1.54 27.66 0.00 05Dec2017 9 p.m. 42.66 0.69 31.20 0.00 05Dec2017 10 p.m. 42.98 0.61 28.27 0.00 05Dec2017 11 p.m. 42.21 1.71 29.31 0.00 06Dec2017 12 a.m. 42.98 1.69 27.78 0.00 06Dec2017 1 a.m. 43.86 0.82 42.31 0.00 06Dec2017 2 a.m. 43.52 0.67 41.15 0.00 06Dec2017 3 a.m. 43.52 4.48 41.27 0.00 06Dec2017 4 a.m. 43.09 4.60 43.96 0.00 06Dec2017 5 a.m. 43.63 1.36 38.28 0.00 06Dec2017 6 a.m. 43.20 7.05 39.81 0.00 06Dec2017 7 a.m. 42.10 6.40 39.02 0.00 Accuml. Values 1047.23 119.38 758.47 1472.00 Num. Valid Values 24 24 24 24 Avg. Values 43.63 4.97 31.60 61.33 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.46 192.08 31.60 126.56 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6840 definition: xcompl = 1 - (RELH_avg/100) TdC = -9.3497 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 = 0.5028 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4972 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.2057 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 = 6.6750 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.1932 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.106 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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