Detailed Weather Data for Project: SARD

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 34.18 11.60 54.47 0.00 29Dec2017 9 a.m. 34.25 11.90 53.73 30.90 29Dec2017 10 a.m. 34.99 10.80 51.84 90.10 29Dec2017 11 a.m. 36.61 12.30 47.28 192.90 29Dec2017 12 p.m. 39.11 16.40 45.31 298.80 29Dec2017 1 p.m. 40.30 15.30 47.63 225.10 29Dec2017 2 p.m. 40.05 15.40 54.63 198.30 29Dec2017 3 p.m. 40.33 15.80 56.43 160.10 29Dec2017 4 p.m. 41.41 9.80 55.31 91.90 29Dec2017 5 p.m. 41.65 9.00 56.87 20.90 29Dec2017 6 p.m. 41.68 9.80 59.40 0.00 29Dec2017 7 p.m. 29.32 11.80 83.00 0.00 29Dec2017 8 p.m. 41.34 4.50 64.24 0.00 29Dec2017 9 p.m. 41.20 5.00 66.85 0.00 29Dec2017 10 p.m. 40.95 8.20 70.38 0.00 29Dec2017 11 p.m. 40.84 5.50 73.61 0.00 30Dec2017 12 a.m. 40.59 3.80 74.80 0.00 30Dec2017 1 a.m. 40.35 4.80 76.03 0.00 30Dec2017 2 a.m. 40.41 2.10 75.86 0.00 30Dec2017 3 a.m. 40.41 0.20 76.74 0.00 30Dec2017 4 a.m. 39.90 0.00 79.22 0.00 30Dec2017 5 a.m. 39.67 1.10 78.58 0.00 30Dec2017 6 a.m. 39.79 0.00 77.28 0.00 30Dec2017 7 a.m. 39.58 0.00 78.21 0.00 Accuml. Values 938.89 185.10 1557.70 1309.00 Num. Valid Values 24 21 24 24 Avg. Values 39.12 8.81 64.90 54.54 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.96 340.37 64.90 112.55 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3510 definition: xcompl = 1 - (RELH_avg/100) TdC = -2.0070 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 = 0.4646 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5354 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.0209 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 = 2.8466 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.5329 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.075 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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