Detailed Weather Data for Project: PENS

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 33.35 1.43 49.94 0.00 29Dec2017 9 a.m. 33.85 1.11 48.62 8.30 29Dec2017 10 a.m. 34.63 1.54 47.34 36.54 29Dec2017 11 a.m. 35.62 2.98 47.09 64.87 29Dec2017 12 p.m. 36.77 3.64 46.01 97.90 29Dec2017 1 p.m. 38.43 4.79 45.41 130.10 29Dec2017 2 p.m. 39.74 6.99 45.73 125.91 29Dec2017 3 p.m. 40.51 5.03 48.82 123.16 29Dec2017 4 p.m. 41.86 6.44 47.90 177.42 29Dec2017 5 p.m. 42.96 5.32 49.12 82.34 29Dec2017 6 p.m. 41.18 2.25 56.14 0.00 29Dec2017 7 p.m. 26.64 7.87 68.08 0.00 29Dec2017 8 p.m. 38.64 0.27 72.84 0.00 29Dec2017 9 p.m. 39.34 2.76 70.16 0.00 29Dec2017 10 p.m. 39.47 1.58 70.23 0.00 29Dec2017 11 p.m. 39.97 2.60 72.67 0.00 30Dec2017 12 a.m. 40.66 5.73 72.53 0.00 30Dec2017 1 a.m. 40.17 7.32 75.33 0.00 30Dec2017 2 a.m. 40.03 7.52 76.87 0.00 30Dec2017 3 a.m. 39.87 6.95 76.97 0.00 30Dec2017 4 a.m. 39.40 10.37 79.23 0.00 30Dec2017 5 a.m. 35.83 18.96 84.41 0.00 30Dec2017 6 a.m. 31.26 17.78 93.54 0.00 30Dec2017 7 a.m. 29.35 16.16 97.95 0.00 Accuml. Values 899.54 147.39 1542.93 846.54 Num. Valid Values 24 24 24 24 Avg. Values 37.48 6.14 64.29 35.27 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.04 237.15 64.29 72.79 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3571 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.0049 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 = 0.4505 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5495 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.3676 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 = 2.7185 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.6708 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.051 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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