Detailed Weather Data for Project: PATM

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 44.85 12.49 49.52 13.00 05Dec2017 9 a.m. 45.07 10.34 47.20 86.00 05Dec2017 10 a.m. 45.52 13.60 41.04 181.00 05Dec2017 11 a.m. 45.95 11.05 38.96 173.00 05Dec2017 12 p.m. 45.75 9.22 33.90 142.00 05Dec2017 1 p.m. 46.51 11.43 33.22 300.00 05Dec2017 2 p.m. 46.51 10.52 27.79 272.00 05Dec2017 3 p.m. 45.84 11.59 27.85 214.00 05Dec2017 4 p.m. 45.64 8.08 28.46 119.00 05Dec2017 5 p.m. 44.10 6.37 32.00 32.00 05Dec2017 6 p.m. 41.99 3.70 37.49 -2.00 05Dec2017 7 p.m. 47.39 1.33 34.93 -2.00 05Dec2017 8 p.m. 40.14 3.24 53.55 -2.00 05Dec2017 9 p.m. 40.24 2.54 59.18 -2.00 05Dec2017 10 p.m. 39.60 2.10 63.88 -2.00 05Dec2017 11 p.m. 40.35 2.23 60.77 -2.00 06Dec2017 12 a.m. 39.69 4.09 56.12 -3.00 06Dec2017 1 a.m. 40.14 5.17 52.22 -3.00 06Dec2017 2 a.m. 38.82 3.28 53.87 -2.00 06Dec2017 3 a.m. 38.71 1.14 53.93 -2.00 06Dec2017 4 a.m. 38.16 2.44 58.75 -2.00 06Dec2017 5 a.m. 38.16 2.48 58.62 -2.00 06Dec2017 6 a.m. 38.05 1.06 62.42 -3.00 06Dec2017 7 a.m. 38.16 0.93 64.31 -2.00 Accuml. Values 1015.32 140.42 1129.98 1501.00 Num. Valid Values 24 24 24 24 Avg. Values 42.31 5.85 47.08 62.54 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 5.73 225.94 47.08 129.06 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5292 definition: xcompl = 1 - (RELH_avg/100) TdC = -4.7506 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 = 0.4916 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5084 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.2162 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 = 4.9007 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.3544 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.091 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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