Detailed Weather Data for Project: CHOU

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. 46.99 0.50 70.12 10.50 02Dec2017 9 a.m. 50.63 3.30 58.35 135.00 02Dec2017 10 a.m. 55.71 6.30 52.37 293.90 02Dec2017 11 a.m. 59.59 7.40 50.83 423.60 02Dec2017 12 p.m. 62.24 7.50 50.04 507.60 02Dec2017 1 p.m. 64.94 5.20 47.94 533.90 02Dec2017 2 p.m. 66.65 3.80 46.41 498.70 02Dec2017 3 p.m. 67.71 3.10 47.08 382.10 02Dec2017 4 p.m. 68.63 2.30 47.23 246.50 02Dec2017 5 p.m. 67.05 2.00 49.59 66.30 02Dec2017 6 p.m. 60.84 0.60 63.18 0.00 02Dec2017 7 p.m. 66.15 12.50 67.23 0.00 02Dec2017 8 p.m. 52.79 0.20 94.55 0.00 02Dec2017 9 p.m. 50.52 0.50 99.02 0.00 02Dec2017 10 p.m. 49.33 0.30 99.33 0.00 02Dec2017 11 p.m. 48.63 0.10 99.61 0.00 03Dec2017 12 a.m. 47.66 0.10 100.00 0.00 03Dec2017 1 a.m. 47.14 0.10 100.29 0.00 03Dec2017 2 a.m. 46.56 0.40 100.46 0.00 03Dec2017 3 a.m. 49.14 1.80 99.62 0.00 03Dec2017 4 a.m. 54.45 2.90 93.33 0.00 03Dec2017 5 a.m. 56.55 5.50 86.66 0.00 03Dec2017 6 a.m. 57.09 6.90 85.45 0.00 03Dec2017 7 a.m. 57.02 6.50 84.35 0.00 Accuml. Values 1354.01 79.80 1793.04 3098.10 Num. Valid Values 24 24 24 24 Avg. Values 56.42 3.32 74.71 129.09 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.57 128.40 74.71 266.37 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2529 definition: xcompl = 1 - (RELH_avg/100) TdC = 9.2116 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 = 0.6053 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3947 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.0353 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 = 3.8961 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.6223 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.089 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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