Detailed Weather Data for Project: PENS

Date Time TAIR WSPD RELH SRAD 05Nov2017 8 a.m. 73.22 4.70 78.92 36.09 05Nov2017 9 a.m. 74.82 7.31 74.93 196.52 05Nov2017 10 a.m. 76.14 7.85 70.65 326.97 05Nov2017 11 a.m. 77.34 8.34 66.32 432.43 05Nov2017 12 p.m. 78.78 6.99 57.12 301.29 05Nov2017 1 p.m. 78.64 9.12 53.84 458.99 05Nov2017 2 p.m. 67.98 14.18 67.74 488.31 05Nov2017 3 p.m. 62.74 13.23 72.71 349.85 05Nov2017 4 p.m. 59.50 12.82 78.17 138.92 05Nov2017 5 p.m. 57.27 13.26 81.36 9.06 05Nov2017 6 p.m. 56.46 12.65 81.82 0.00 05Nov2017 7 p.m. 45.23 10.35 98.63 0.00 05Nov2017 8 p.m. 55.33 11.25 83.55 0.00 05Nov2017 9 p.m. 55.33 12.65 82.49 0.00 05Nov2017 10 p.m. 55.04 13.81 81.87 0.00 05Nov2017 11 p.m. 54.77 12.51 82.52 0.00 06Nov2017 12 a.m. 54.57 12.08 80.89 0.00 06Nov2017 1 a.m. 54.18 10.42 79.63 0.00 06Nov2017 2 a.m. 53.78 8.68 78.99 0.00 06Nov2017 3 a.m. 52.92 5.16 78.83 0.00 06Nov2017 4 a.m. 53.22 6.01 80.96 0.00 06Nov2017 5 a.m. 53.29 8.54 83.43 0.00 06Nov2017 6 a.m. 53.24 8.22 84.51 0.00 06Nov2017 7 a.m. 53.19 8.77 84.70 0.00 Accuml. Values 1456.99 238.90 1864.58 2738.43 Num. Valid Values 24 24 24 24 Avg. Values 60.71 9.95 77.69 114.10 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.95 384.39 77.69 235.45 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2231 definition: xcompl = 1 - (RELH_avg/100) TdC = 12.0994 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 = 0.6370 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3630 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.7621 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 = 4.0048 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.2036 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.119 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.