Detailed Weather Data for Project: PENS

Date Time TAIR WSPD RELH SRAD 06Nov2017 8 a.m. 53.78 8.16 84.21 64.60 06Nov2017 9 a.m. 54.52 7.88 80.52 112.56 06Nov2017 10 a.m. 55.18 7.46 79.33 63.16 06Nov2017 11 a.m. 51.85 11.81 83.41 45.90 06Nov2017 12 p.m. 50.63 10.66 85.25 63.40 06Nov2017 1 p.m. 49.64 10.39 92.88 69.12 06Nov2017 2 p.m. 48.92 10.54 95.51 60.18 06Nov2017 3 p.m. 48.36 11.25 95.20 31.17 06Nov2017 4 p.m. 46.94 11.28 96.17 21.83 06Nov2017 5 p.m. 46.33 12.03 97.74 4.64 06Nov2017 6 p.m. 45.90 12.77 98.18 0.00 06Nov2017 7 p.m. 44.83 13.46 91.97 0.00 06Nov2017 8 p.m. 45.41 10.12 98.94 0.00 06Nov2017 9 p.m. 46.06 10.14 99.17 0.00 06Nov2017 10 p.m. 45.54 10.14 99.37 0.00 06Nov2017 11 p.m. 45.12 10.28 99.70 0.00 07Nov2017 12 a.m. 45.00 9.61 99.97 0.00 07Nov2017 1 a.m. 45.48 9.37 100.16 0.00 07Nov2017 2 a.m. 45.93 10.38 100.31 0.00 07Nov2017 3 a.m. 46.00 10.54 100.32 0.00 07Nov2017 4 a.m. 46.08 10.81 100.32 0.00 07Nov2017 5 a.m. 45.99 12.41 100.32 0.00 07Nov2017 6 a.m. 45.77 12.85 100.32 0.00 07Nov2017 7 a.m. 45.32 13.21 100.32 0.00 Accuml. Values 1144.58 257.55 2279.59 536.56 Num. Valid Values 24 24 24 24 Avg. Values 47.69 10.73 94.98 22.36 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 8.72 414.40 94.98 46.13 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.0502 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.9351 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 = 0.5365 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4635 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.5708 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 = 0.5834 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.0093 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.006 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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