Detailed Weather Data for Project: PENS

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 53.62 1.52 97.62 0.00 04Nov2017 9 a.m. 54.23 1.47 97.84 4.57 04Nov2017 10 a.m. 55.35 2.34 97.08 32.22 04Nov2017 11 a.m. 56.37 1.37 96.72 45.80 04Nov2017 12 p.m. 57.54 0.93 97.55 66.72 04Nov2017 1 p.m. 60.03 1.39 98.15 69.09 04Nov2017 2 p.m. 62.91 2.54 98.24 73.19 04Nov2017 3 p.m. 65.46 4.27 93.80 210.21 04Nov2017 4 p.m. 69.13 4.91 81.23 356.94 04Nov2017 5 p.m. 70.11 2.66 78.08 165.11 04Nov2017 6 p.m. 69.19 1.17 79.31 37.35 04Nov2017 7 p.m. 66.51 1.76 87.88 0.00 04Nov2017 8 p.m. 55.65 13.67 83.84 0.00 04Nov2017 9 p.m. 63.54 3.28 91.12 0.00 04Nov2017 10 p.m. 63.45 2.06 94.06 0.00 04Nov2017 11 p.m. 62.92 0.47 95.20 0.00 05Nov2017 12 a.m. 71.87 3.57 83.20 0.00 05Nov2017 1 a.m. 72.68 4.34 80.26 0.00 05Nov2017 2 a.m. 73.27 4.89 77.91 0.00 05Nov2017 3 a.m. 73.02 3.95 78.19 0.00 05Nov2017 4 a.m. 72.46 3.94 79.66 0.00 05Nov2017 5 a.m. 72.72 3.45 79.59 0.00 05Nov2017 6 a.m. 72.37 3.28 80.48 0.00 05Nov2017 7 a.m. 73.38 4.67 77.02 0.00 Accuml. Values 1567.78 77.90 2104.03 1061.20 Num. Valid Values 24 24 24 24 Avg. Values 65.32 3.25 87.67 44.22 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 18.51 125.34 87.67 91.24 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1233 definition: xcompl = 1 - (RELH_avg/100) TdC = 16.4246 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 = 0.6691 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3309 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.0585 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 = 2.6317 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.8359 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.025 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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