Detailed Weather Data for Project: SARD

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. 55.54 18.20 55.28 35.70 02Dec2017 9 a.m. 57.18 17.60 55.89 191.00 02Dec2017 10 a.m. 59.31 18.30 54.27 365.30 02Dec2017 11 a.m. 62.04 16.80 51.62 448.80 02Dec2017 12 p.m. 64.99 12.50 49.86 458.90 02Dec2017 1 p.m. 67.86 11.20 49.31 449.30 02Dec2017 2 p.m. 70.02 11.80 47.52 456.80 02Dec2017 3 p.m. 71.22 13.00 47.34 311.70 02Dec2017 4 p.m. 71.47 10.90 47.89 148.20 02Dec2017 5 p.m. 69.76 3.90 50.97 23.30 02Dec2017 6 p.m. 66.92 1.10 57.16 0.00 02Dec2017 7 p.m. 69.31 10.30 54.38 0.00 02Dec2017 8 p.m. 61.43 1.70 68.24 0.00 02Dec2017 9 p.m. 60.01 2.60 73.02 0.00 02Dec2017 10 p.m. 58.64 1.40 75.56 0.00 02Dec2017 11 p.m. 60.42 5.50 70.98 0.00 03Dec2017 12 a.m. 61.48 10.60 69.19 0.00 03Dec2017 1 a.m. 62.29 15.10 68.15 0.00 03Dec2017 2 a.m. 61.25 10.70 70.72 0.00 03Dec2017 3 a.m. 60.71 6.60 72.69 0.00 03Dec2017 4 a.m. 59.95 8.50 74.19 0.00 03Dec2017 5 a.m. 59.58 6.30 74.96 0.00 03Dec2017 6 a.m. 58.98 9.00 76.37 0.00 03Dec2017 7 a.m. 59.47 14.20 74.84 0.00 Accuml. Values 1509.85 237.80 1490.40 2889.00 Num. Valid Values 24 24 24 24 Avg. Values 62.91 9.91 62.10 120.38 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 17.17 382.62 62.10 248.40 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3790 definition: xcompl = 1 - (RELH_avg/100) TdC = 9.9368 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 = 0.6526 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3474 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.9887 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 = 7.3617 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.8617 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.172 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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