Detailed Weather Data for Project: PENS

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 63.23 3.79 84.40 1.66 04Dec2017 9 a.m. 64.74 4.60 81.67 10.93 04Dec2017 10 a.m. 65.93 5.66 79.76 35.26 04Dec2017 11 a.m. 67.62 6.58 76.88 115.94 04Dec2017 12 p.m. 69.12 6.36 74.08 191.14 04Dec2017 1 p.m. 71.56 7.19 68.48 258.23 04Dec2017 2 p.m. 73.81 8.63 62.69 357.05 04Dec2017 3 p.m. 74.28 8.15 61.14 147.51 04Dec2017 4 p.m. 73.45 6.27 64.14 67.11 04Dec2017 5 p.m. 70.54 5.72 73.84 2.18 04Dec2017 6 p.m. 66.83 13.01 45.87 0.00 04Dec2017 7 p.m. 40.01 1.41 35.07 0.00 04Dec2017 8 p.m. 61.57 15.02 34.11 0.00 04Dec2017 9 p.m. 56.05 20.50 47.30 0.00 04Dec2017 10 p.m. 52.03 17.40 47.63 0.00 04Dec2017 11 p.m. 49.33 14.78 46.17 0.00 05Dec2017 12 a.m. 46.67 11.73 49.04 0.00 05Dec2017 1 a.m. 44.33 15.81 53.01 0.00 05Dec2017 2 a.m. 42.89 13.36 57.24 0.00 05Dec2017 3 a.m. 41.36 11.71 60.14 0.00 05Dec2017 4 a.m. 38.80 15.38 59.60 0.00 05Dec2017 5 a.m. 37.49 14.31 58.93 0.00 05Dec2017 6 a.m. 36.18 13.15 57.46 0.00 05Dec2017 7 a.m. 35.91 12.36 52.54 0.00 Accuml. Values 1343.75 252.88 1431.19 1187.01 Num. Valid Values 24 24 24 24 Avg. Values 55.99 10.54 59.63 49.46 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.33 406.88 59.63 102.06 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4037 definition: xcompl = 1 - (RELH_avg/100) TdC = 5.6935 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 = 0.6021 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3979 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.0815 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 = 6.1525 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.9154 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.126 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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