Detailed Weather Data for Project: THUN

Date Time TAIR WSPD RELH SRAD 06Nov2017 8 a.m. 46.67 9.84 87.75 15.25 06Nov2017 9 a.m. 45.98 9.77 94.33 56.67 06Nov2017 10 a.m. 46.62 9.12 95.25 79.75 06Nov2017 11 a.m. 47.12 10.07 92.67 107.33 06Nov2017 12 p.m. 47.84 10.07 90.25 136.00 06Nov2017 1 p.m. 48.86 9.10 83.67 170.33 06Nov2017 2 p.m. 51.03 8.61 78.75 233.25 06Nov2017 3 p.m. 51.71 7.10 76.75 162.50 06Nov2017 4 p.m. 51.66 7.66 74.50 101.50 06Nov2017 5 p.m. 50.22 9.45 74.50 37.50 06Nov2017 6 p.m. 48.02 8.28 78.00 0.00 06Nov2017 7 p.m. 47.12 8.28 78.00 0.00 06Nov2017 8 p.m. 46.94 7.83 78.00 0.00 06Nov2017 9 p.m. 46.40 6.71 78.00 0.00 06Nov2017 10 p.m. 45.86 6.64 79.33 0.00 06Nov2017 11 p.m. 45.27 7.05 80.25 0.00 07Nov2017 12 a.m. 44.87 8.61 81.75 0.00 07Nov2017 1 a.m. 44.51 6.77 82.25 0.00 07Nov2017 2 a.m. 44.06 8.72 84.25 0.00 07Nov2017 3 a.m. 43.88 9.99 85.33 0.00 07Nov2017 4 a.m. 43.83 11.24 86.50 0.00 07Nov2017 5 a.m. 43.52 13.98 87.00 0.00 07Nov2017 6 a.m. 43.52 10.57 86.00 0.00 07Nov2017 7 a.m. 43.34 10.07 85.00 0.50 Accuml. Values 1118.85 215.53 1998.08 1100.58 Num. Valid Values 24 24 24 24 Avg. Values 46.62 8.98 83.25 45.86 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 8.12 346.79 83.25 94.63 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1675 definition: xcompl = 1 - (RELH_avg/100) TdC = 5.4513 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 = 0.5276 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4724 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.0900 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 = 1.8182 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.4128 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.043 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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