Detailed Weather Data for Project: SARD

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 33.03 3.70 81.37 6.20 06Dec2017 9 a.m. 33.76 3.40 81.42 57.00 06Dec2017 10 a.m. 36.99 0.70 73.45 155.90 06Dec2017 11 a.m. 39.45 1.40 70.16 230.40 06Dec2017 12 p.m. 41.65 1.10 65.78 289.90 06Dec2017 1 p.m. 45.41 3.80 54.21 356.40 06Dec2017 2 p.m. 49.19 5.00 38.65 306.70 06Dec2017 3 p.m. 50.45 6.20 36.15 256.10 06Dec2017 4 p.m. 50.83 5.20 33.99 158.30 06Dec2017 5 p.m. 50.58 5.90 37.56 37.10 06Dec2017 6 p.m. 48.07 1.30 42.36 0.00 06Dec2017 7 p.m. 34.52 13.00 46.43 0.00 06Dec2017 8 p.m. 41.63 1.90 56.23 0.00 06Dec2017 9 p.m. 38.61 3.30 63.55 0.00 06Dec2017 10 p.m. 39.25 5.00 63.62 0.00 06Dec2017 11 p.m. 45.61 13.10 54.68 0.00 07Dec2017 12 a.m. 44.73 12.20 54.58 0.00 07Dec2017 1 a.m. 44.08 7.90 55.26 0.00 07Dec2017 2 a.m. 43.61 6.10 56.45 0.00 07Dec2017 3 a.m. 42.67 9.00 64.07 0.00 07Dec2017 4 a.m. 41.43 17.70 61.07 0.00 07Dec2017 5 a.m. 38.08 13.50 63.84 0.00 07Dec2017 6 a.m. 36.37 10.00 68.85 0.00 07Dec2017 7 a.m. 34.65 17.30 71.16 0.00 Accuml. Values 1004.65 167.70 1394.89 1854.00 Num. Valid Values 24 24 24 24 Avg. Values 41.86 6.99 58.12 77.25 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 5.48 269.83 58.12 159.41 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4188 definition: xcompl = 1 - (RELH_avg/100) TdC = -2.0785 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 = 0.4878 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5122 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.5199 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 = 3.7879 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.8822 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.088 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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