Detailed Weather Data for Project: HEYB

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. 43.92 0.20 86.99 3.40 02Dec2017 9 a.m. 45.75 1.00 79.90 125.10 02Dec2017 10 a.m. 53.19 1.30 64.72 269.70 02Dec2017 11 a.m. 59.16 1.30 58.64 386.20 02Dec2017 12 p.m. 63.21 2.80 56.30 453.60 02Dec2017 1 p.m. 65.61 2.10 53.45 464.90 02Dec2017 2 p.m. 66.40 2.50 53.71 409.00 02Dec2017 3 p.m. 68.32 2.50 50.28 178.20 02Dec2017 4 p.m. 69.35 2.40 49.44 132.20 02Dec2017 5 p.m. 68.20 3.20 51.20 21.90 02Dec2017 6 p.m. 64.35 1.80 57.82 0.00 02Dec2017 7 p.m. 67.62 2.20 67.45 0.00 02Dec2017 8 p.m. 57.09 1.30 72.87 0.00 02Dec2017 9 p.m. 52.81 0.30 85.07 0.00 02Dec2017 10 p.m. 51.60 0.90 85.79 0.00 02Dec2017 11 p.m. 50.49 1.60 86.45 0.00 03Dec2017 12 a.m. 49.71 1.10 88.60 0.00 03Dec2017 1 a.m. 48.94 0.70 88.26 0.00 03Dec2017 2 a.m. 49.01 1.50 86.45 0.00 03Dec2017 3 a.m. 48.97 2.30 85.75 0.00 03Dec2017 4 a.m. 49.17 1.20 85.71 0.00 03Dec2017 5 a.m. 48.69 0.50 86.18 0.00 03Dec2017 6 a.m. 48.34 0.30 89.44 0.00 03Dec2017 7 a.m. 48.74 0.20 90.03 0.00 Accuml. Values 1338.64 35.20 1760.50 2444.20 Num. Valid Values 24 24 24 24 Avg. Values 55.78 1.47 73.35 101.84 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.21 56.64 73.35 210.15 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2665 definition: xcompl = 1 - (RELH_avg/100) TdC = 8.6013 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 = 0.6005 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3995 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.3308 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 = 4.0109 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.9836 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.063 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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