Detailed Weather Data for Project: PENS

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 56.70 2.09 46.36 2.51 04Mar2018 9 a.m. 56.82 2.17 47.86 43.63 04Mar2018 10 a.m. 57.90 2.84 48.73 93.91 04Mar2018 11 a.m. 59.07 3.29 48.07 116.51 04Mar2018 12 p.m. 60.24 4.33 47.30 104.64 04Mar2018 1 p.m. 59.79 3.89 50.76 75.90 04Mar2018 2 p.m. 58.37 3.76 58.08 73.75 04Mar2018 3 p.m. 57.70 3.12 57.80 39.80 04Mar2018 4 p.m. 57.70 3.15 57.17 32.19 04Mar2018 5 p.m. 57.43 2.62 58.72 6.73 04Mar2018 6 p.m. 57.20 3.65 61.87 0.00 04Mar2018 7 p.m. 56.05 7.64 18.40 0.00 04Mar2018 8 p.m. 56.84 3.41 66.16 0.00 04Mar2018 9 p.m. 56.05 3.62 73.85 0.12 04Mar2018 10 p.m. 55.31 3.55 79.39 0.02 04Mar2018 11 p.m. 55.96 3.84 74.80 0.00 05Mar2018 12 a.m. 56.44 3.39 71.67 0.00 05Mar2018 1 a.m. 56.68 3.07 71.24 0.00 05Mar2018 2 a.m. 57.29 2.89 71.12 0.00 05Mar2018 3 a.m. 58.37 2.85 72.82 0.00 05Mar2018 4 a.m. 60.64 4.12 75.82 0.00 05Mar2018 5 a.m. 61.57 4.69 77.93 0.00 05Mar2018 6 a.m. 63.32 6.33 78.79 0.00 05Mar2018 7 a.m. 63.55 6.53 80.76 0.00 Accuml. Values 1397.01 90.84 1495.47 589.71 Num. Valid Values 24 24 24 24 Avg. Values 58.21 3.79 62.31 24.57 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 14.56 146.16 62.31 50.70 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3769 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.5081 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 = 0.6188 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3812 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.4705 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 = 6.2062 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.2069 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.052 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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