Detailed Weather Data for Project: CHEN

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. 29.03 5.24 84.45 104.00 08Nov2017 9 a.m. 31.66 3.92 82.61 293.00 08Nov2017 10 a.m. 35.83 2.92 79.25 463.00 08Nov2017 11 a.m. 38.80 4.77 70.95 587.00 08Nov2017 12 p.m. 41.77 5.28 60.39 655.00 08Nov2017 1 p.m. 44.62 5.51 55.20 654.00 08Nov2017 2 p.m. 46.71 5.21 48.60 590.00 08Nov2017 3 p.m. 51.98 6.09 33.33 461.00 08Nov2017 4 p.m. 51.87 5.33 32.78 288.00 08Nov2017 5 p.m. 51.66 3.10 32.85 83.00 08Nov2017 6 p.m. 47.05 3.57 37.79 1.00 08Nov2017 7 p.m. 37.15 10.02 56.11 0.00 08Nov2017 8 p.m. 36.37 2.84 60.51 0.00 08Nov2017 9 p.m. 35.40 3.24 59.23 0.00 08Nov2017 10 p.m. 32.99 3.91 65.64 0.00 08Nov2017 11 p.m. 28.69 2.80 78.83 0.00 09Nov2017 12 a.m. 27.37 3.56 80.85 0.00 09Nov2017 1 a.m. 26.60 4.50 82.00 0.00 09Nov2017 2 a.m. 29.46 2.15 78.16 1.00 09Nov2017 3 a.m. 28.36 3.25 76.20 0.00 09Nov2017 4 a.m. 28.15 3.51 78.04 0.00 09Nov2017 5 a.m. 26.49 3.32 85.55 0.00 09Nov2017 6 a.m. 26.92 2.62 85.54 0.00 09Nov2017 7 a.m. 28.26 2.29 81.15 2.00 Accuml. Values 863.20 98.95 1586.01 4182.00 Num. Valid Values 24 24 24 24 Avg. Values 35.97 4.12 66.08 174.25 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 2.20 159.21 66.08 359.57 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3392 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.4372 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 = 0.4375 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5625 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.5617 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 = 2.4317 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.9272 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.087 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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