Detailed Weather Data for Project: THUN

Date Time TAIR WSPD RELH SRAD 05Nov2017 8 a.m. 65.25 10.68 79.75 84.00 05Nov2017 9 a.m. 68.18 11.33 67.00 262.67 05Nov2017 10 a.m. 72.86 12.41 49.50 432.50 05Nov2017 11 a.m. 75.26 11.56 40.33 552.67 05Nov2017 12 p.m. 74.43 13.37 39.50 624.75 05Nov2017 1 p.m. 70.34 15.36 45.67 573.67 05Nov2017 2 p.m. 66.78 15.43 55.00 575.25 05Nov2017 3 p.m. 63.36 14.88 61.25 460.75 05Nov2017 4 p.m. 62.64 13.42 63.25 305.25 05Nov2017 5 p.m. 59.31 13.20 69.00 126.50 05Nov2017 6 p.m. 54.68 10.96 79.00 0.00 05Nov2017 7 p.m. 52.88 15.88 80.00 0.00 05Nov2017 8 p.m. 51.35 10.96 83.00 0.00 05Nov2017 9 p.m. 49.88 9.69 84.67 0.00 05Nov2017 10 p.m. 49.23 10.96 85.50 0.00 05Nov2017 11 p.m. 49.28 10.46 84.00 0.00 06Nov2017 12 a.m. 48.47 5.14 85.25 0.00 06Nov2017 1 a.m. 46.71 4.42 88.50 0.00 06Nov2017 2 a.m. 45.68 5.42 91.50 0.00 06Nov2017 3 a.m. 45.68 7.23 91.00 0.00 06Nov2017 4 a.m. 46.17 8.56 90.25 0.00 06Nov2017 5 a.m. 46.76 9.06 88.50 0.00 06Nov2017 6 a.m. 46.76 9.28 86.75 0.00 06Nov2017 7 a.m. 46.67 8.39 87.00 1.00 Accuml. Values 1358.61 258.05 1775.17 3999.01 Num. Valid Values 24 24 24 24 Avg. Values 56.61 10.75 73.97 166.63 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.67 415.20 73.97 343.83 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2603 definition: xcompl = 1 - (RELH_avg/100) TdC = 9.1691 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 = 0.6068 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3932 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.0330 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 = 4.0376 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.5462 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.158 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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