Detailed Weather Data for Project: CHOU

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. 41.67 5.50 91.23 17.40 08Nov2017 9 a.m. 41.86 6.90 87.73 83.00 08Nov2017 10 a.m. 42.40 7.80 86.44 143.30 08Nov2017 11 a.m. 43.79 6.20 82.53 194.50 08Nov2017 12 p.m. 45.39 5.40 77.40 232.30 08Nov2017 1 p.m. 47.55 4.50 71.29 304.80 08Nov2017 2 p.m. 49.87 2.70 63.74 319.40 08Nov2017 3 p.m. 53.06 2.00 55.55 490.70 08Nov2017 4 p.m. 54.01 2.70 50.04 318.80 08Nov2017 5 p.m. 54.09 1.50 47.62 129.10 08Nov2017 6 p.m. 49.14 0.50 64.96 0.00 08Nov2017 7 p.m. 47.01 0.00 90.12 0.00 08Nov2017 8 p.m. 42.04 0.60 98.92 0.00 08Nov2017 9 p.m. 40.24 0.00 99.48 0.00 08Nov2017 10 p.m. 39.87 0.40 97.25 0.00 08Nov2017 11 p.m. 38.61 0.30 96.86 0.00 09Nov2017 12 a.m. 36.05 0.10 99.97 0.00 09Nov2017 1 a.m. 35.10 0.10 100.11 0.00 09Nov2017 2 a.m. 34.03 0.10 100.15 0.00 09Nov2017 3 a.m. 32.85 0.00 100.16 0.00 09Nov2017 4 a.m. 32.34 0.30 100.16 0.00 09Nov2017 5 a.m. 31.68 0.40 100.13 0.00 09Nov2017 6 a.m. 30.49 0.40 100.07 0.00 09Nov2017 7 a.m. 30.29 0.20 100.04 0.00 Accuml. Values 993.43 48.60 2061.95 2233.30 Num. Valid Values 24 21 24 24 Avg. Values 41.39 2.31 85.91 93.05 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 5.22 89.37 85.91 192.02 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1409 definition: xcompl = 1 - (RELH_avg/100) TdC = 3.0395 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 = 0.4839 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5161 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.8519 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 = 1.2614 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.8332 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.033 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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