Detailed Weather Data for Project: SARD

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 40.03 1.90 77.68 0.00 30Dec2017 9 a.m. 40.86 9.70 76.46 4.70 30Dec2017 10 a.m. 40.51 15.10 75.32 29.90 30Dec2017 11 a.m. 37.00 17.90 80.04 31.20 30Dec2017 12 p.m. 34.34 12.90 81.64 39.00 30Dec2017 1 p.m. 32.56 17.20 84.89 36.40 30Dec2017 2 p.m. 31.06 13.60 87.96 25.90 30Dec2017 3 p.m. 30.00 13.00 88.85 27.80 30Dec2017 4 p.m. 29.84 14.20 88.31 31.50 30Dec2017 5 p.m. 29.93 13.50 86.23 2.00 30Dec2017 6 p.m. 29.61 14.10 84.78 0.00 30Dec2017 7 p.m. 23.52 16.70 50.42 0.00 30Dec2017 8 p.m. 29.26 13.90 82.21 0.00 30Dec2017 9 p.m. 28.99 11.70 80.57 0.00 30Dec2017 10 p.m. 28.89 8.60 79.06 0.00 30Dec2017 11 p.m. 29.14 6.70 79.01 0.00 31Dec2017 12 a.m. 29.25 6.30 78.51 0.00 31Dec2017 1 a.m. 29.39 9.30 78.77 0.00 31Dec2017 2 a.m. 29.35 9.70 79.98 0.00 31Dec2017 3 a.m. 29.05 13.00 83.87 0.00 31Dec2017 4 a.m. 28.72 11.20 86.50 0.00 31Dec2017 5 a.m. 28.74 10.60 86.67 0.00 31Dec2017 6 a.m. 28.04 22.10 89.27 0.00 31Dec2017 7 a.m. 23.67 26.30 88.04 0.00 Accuml. Values 741.76 309.20 1955.04 228.40 Num. Valid Values 24 24 24 24 Avg. Values 30.91 12.88 81.46 9.52 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -0.61 497.50 81.46 19.64 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1854 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.3913 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 = 0.3942 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6058 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.8572 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 = 1.0934 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.0150 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.035 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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