Detailed Weather Data for Project: SARD

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 42.73 15.60 60.96 8.00 05Dec2017 9 a.m. 41.86 20.30 59.06 37.40 05Dec2017 10 a.m. 41.54 15.70 58.92 116.20 05Dec2017 11 a.m. 41.04 11.00 52.86 98.20 05Dec2017 12 p.m. 41.11 14.20 48.33 134.10 05Dec2017 1 p.m. 42.37 11.20 43.64 177.40 05Dec2017 2 p.m. 42.46 15.10 41.61 239.30 05Dec2017 3 p.m. 43.43 11.10 38.35 209.40 05Dec2017 4 p.m. 44.01 6.40 36.65 177.40 05Dec2017 5 p.m. 43.57 6.10 36.51 28.00 05Dec2017 6 p.m. 42.87 4.70 35.31 0.00 05Dec2017 7 p.m. 43.30 2.60 49.78 0.00 05Dec2017 8 p.m. 41.85 1.40 36.05 0.00 05Dec2017 9 p.m. 41.67 0.20 38.63 0.00 05Dec2017 10 p.m. 39.60 0.00 41.90 0.00 05Dec2017 11 p.m. 37.58 0.00 51.50 0.00 06Dec2017 12 a.m. 34.72 0.20 65.35 0.00 06Dec2017 1 a.m. 32.63 0.00 72.96 0.00 06Dec2017 2 a.m. 32.63 0.00 70.54 0.00 06Dec2017 3 a.m. 31.91 0.00 75.87 0.00 06Dec2017 4 a.m. 32.27 0.00 75.27 0.00 06Dec2017 5 a.m. 32.27 2.70 77.14 0.00 06Dec2017 6 a.m. 32.41 2.30 80.26 0.00 06Dec2017 7 a.m. 32.54 4.40 83.25 0.00 Accuml. Values 932.36 145.20 1330.70 1225.40 Num. Valid Values 24 18 24 24 Avg. Values 38.85 8.07 55.45 51.06 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.80 311.50 55.45 105.36 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4455 definition: xcompl = 1 - (RELH_avg/100) TdC = -4.2980 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 = 0.4622 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5378 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.0508 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 = 3.5945 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.0798 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.085 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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