Detailed Weather Data for Project: PENS

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. 42.19 11.55 83.92 6.66 08Nov2017 9 a.m. 42.01 10.93 81.52 56.67 08Nov2017 10 a.m. 43.65 8.63 78.83 165.82 08Nov2017 11 a.m. 46.08 6.49 68.14 347.83 08Nov2017 12 p.m. 48.56 5.87 63.46 392.36 08Nov2017 1 p.m. 50.36 6.55 55.44 356.99 08Nov2017 2 p.m. 51.85 5.53 51.70 477.77 08Nov2017 3 p.m. 53.53 5.96 46.99 392.91 08Nov2017 4 p.m. 54.86 5.27 43.90 240.93 08Nov2017 5 p.m. 55.17 6.61 44.13 73.85 08Nov2017 6 p.m. 54.25 7.73 48.08 0.00 08Nov2017 7 p.m. 57.06 6.46 52.72 0.00 08Nov2017 8 p.m. 47.48 0.57 67.68 0.00 08Nov2017 9 p.m. 43.95 1.13 76.10 0.00 08Nov2017 10 p.m. 41.41 1.71 83.01 0.00 08Nov2017 11 p.m. 40.24 0.68 88.67 0.00 09Nov2017 12 a.m. 39.09 1.57 86.54 0.00 09Nov2017 1 a.m. 38.14 1.25 90.05 0.00 09Nov2017 2 a.m. 37.67 1.09 91.68 0.00 09Nov2017 3 a.m. 37.08 0.29 92.64 0.00 09Nov2017 4 a.m. 37.18 0.54 91.27 0.00 09Nov2017 5 a.m. 36.19 0.68 92.51 0.00 09Nov2017 6 a.m. 36.14 0.61 93.89 0.00 09Nov2017 7 a.m. 35.17 1.34 93.35 0.00 Accuml. Values 1069.30 99.04 1766.22 2511.79 Num. Valid Values 24 24 24 24 Avg. Values 44.55 4.13 73.59 104.66 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.97 159.36 73.59 215.96 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2641 definition: xcompl = 1 - (RELH_avg/100) TdC = 2.6174 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 = 0.5105 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4895 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.1651 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 = 2.6331 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.0680 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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