Detailed Weather Data for Project: PENS

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 15.03 1.80 60.68 0.00 02Jan2018 9 a.m. 15.66 1.45 61.23 20.40 02Jan2018 10 a.m. 16.32 1.80 57.70 61.72 02Jan2018 11 a.m. 17.49 2.09 52.03 91.64 02Jan2018 12 p.m. 18.63 1.43 51.68 108.06 02Jan2018 1 p.m. 19.60 1.90 48.98 138.11 02Jan2018 2 p.m. 20.32 2.75 48.71 124.54 02Jan2018 3 p.m. 20.75 2.30 48.34 102.05 02Jan2018 4 p.m. 21.43 2.75 46.69 101.71 02Jan2018 5 p.m. 21.79 2.36 46.59 27.90 02Jan2018 6 p.m. 22.12 1.34 47.92 0.00 02Jan2018 7 p.m. 31.59 4.72 43.21 0.00 02Jan2018 8 p.m. 20.32 0.72 54.63 0.00 02Jan2018 9 p.m. 19.29 0.96 59.33 0.00 02Jan2018 10 p.m. 18.52 1.12 60.11 0.00 02Jan2018 11 p.m. 18.12 1.04 61.99 0.00 03Jan2018 12 a.m. 17.71 2.47 61.86 0.00 03Jan2018 1 a.m. 17.87 2.20 62.29 0.00 03Jan2018 2 a.m. 18.86 2.57 58.86 0.00 03Jan2018 3 a.m. 19.13 3.11 54.63 0.00 03Jan2018 4 a.m. 18.79 3.39 54.91 0.00 03Jan2018 5 a.m. 18.36 1.82 58.35 0.00 03Jan2018 6 a.m. 17.96 2.29 59.79 0.00 03Jan2018 7 a.m. 17.80 3.18 60.53 0.00 Accuml. Values 463.44 51.56 1321.04 776.13 Num. Valid Values 24 24 24 24 Avg. Values 19.31 2.15 55.04 32.34 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -7.05 82.96 55.04 66.73 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4496 definition: xcompl = 1 - (RELH_avg/100) TdC = -14.5674 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 = 0.2979 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7021 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.4984 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 = 1.6363 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.0189 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.022 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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