Detailed Weather Data for Project: PENS

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. 52.47 0.31 64.97 19.45 02Dec2017 9 a.m. 53.58 0.36 60.51 155.41 02Dec2017 10 a.m. 57.04 1.43 54.54 256.10 02Dec2017 11 a.m. 61.52 2.77 52.31 406.28 02Dec2017 12 p.m. 65.44 3.37 47.86 467.42 02Dec2017 1 p.m. 66.04 4.08 48.50 474.91 02Dec2017 2 p.m. 64.78 4.16 57.67 422.64 02Dec2017 3 p.m. 64.76 3.07 60.67 321.50 02Dec2017 4 p.m. 64.78 3.67 62.16 180.62 02Dec2017 5 p.m. 64.20 1.84 65.36 38.09 02Dec2017 6 p.m. 62.01 2.84 72.60 0.00 02Dec2017 7 p.m. 67.60 3.11 64.91 0.00 02Dec2017 8 p.m. 58.06 1.18 77.73 0.00 02Dec2017 9 p.m. 57.18 2.13 81.10 0.00 02Dec2017 10 p.m. 54.72 0.73 81.02 0.00 02Dec2017 11 p.m. 53.47 0.44 80.86 0.00 03Dec2017 12 a.m. 53.46 0.60 82.00 0.00 03Dec2017 1 a.m. 52.95 0.10 84.35 0.00 03Dec2017 2 a.m. 54.70 0.04 84.38 0.00 03Dec2017 3 a.m. 55.96 0.25 73.76 0.00 03Dec2017 4 a.m. 55.74 0.26 73.05 0.00 03Dec2017 5 a.m. 55.78 0.73 74.95 0.00 03Dec2017 6 a.m. 55.87 0.74 76.28 0.00 03Dec2017 7 a.m. 56.08 1.03 77.22 0.00 Accuml. Values 1408.19 39.24 1658.76 2742.42 Num. Valid Values 24 24 24 24 Avg. Values 58.67 1.63 69.11 114.27 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 14.82 63.14 69.11 235.79 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3089 definition: xcompl = 1 - (RELH_avg/100) TdC = 9.2836 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 = 0.6222 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3778 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.7138 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 = 5.1547 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.5534 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.080 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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