Detailed Weather Data for Project: SKIA

Date Time TAIR WSPD RELH SRAD 05Nov2017 8 a.m. -901.00 9.16 84.53 65.68 05Nov2017 9 a.m. -901.00 11.23 78.98 268.39 05Nov2017 10 a.m. -901.00 16.25 66.44 400.41 05Nov2017 11 a.m. -901.00 14.65 60.18 603.32 05Nov2017 12 p.m. -901.00 11.98 49.48 666.41 05Nov2017 1 p.m. -901.00 11.42 61.52 671.41 05Nov2017 2 p.m. -901.00 13.76 76.50 293.43 05Nov2017 3 p.m. -901.00 12.16 79.89 59.09 05Nov2017 4 p.m. -901.00 12.08 79.55 24.79 05Nov2017 5 p.m. -901.00 9.65 77.95 6.55 05Nov2017 6 p.m. -901.00 8.93 75.85 0.00 05Nov2017 7 p.m. -901.00 7.32 90.00 0.00 05Nov2017 8 p.m. -901.00 7.75 73.11 0.00 05Nov2017 9 p.m. -901.00 5.40 74.10 0.00 05Nov2017 10 p.m. -901.00 5.81 82.56 0.00 05Nov2017 11 p.m. -901.00 10.16 80.14 0.00 06Nov2017 12 a.m. -901.00 11.32 78.19 0.00 06Nov2017 1 a.m. -901.00 11.07 80.17 0.00 06Nov2017 2 a.m. -901.00 7.52 78.90 0.00 06Nov2017 3 a.m. -901.00 7.31 79.84 0.00 06Nov2017 4 a.m. -901.00 10.63 80.02 0.00 06Nov2017 5 a.m. -901.00 11.03 79.22 0.00 06Nov2017 6 a.m. -901.00 9.59 79.71 0.00 06Nov2017 7 a.m. -901.00 9.49 79.79 0.00 Accuml. Values 0.00 245.67 1826.62 3059.48 Num. Valid Values 0 24 24 24 Avg. Values 10.24 76.11 127.48 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -17.78 395.28 76.11 263.05 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2389 definition: xcompl = 1 - (RELH_avg/100) TdC = -20.9525 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 = 0.1635 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.8365 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.0277 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 = 0.3631 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.6422 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.028 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.