Detailed Weather Data for Project: WDMA

Date Time TAIR WSPD RELH SRAD 05Nov2017 8 a.m. 75.63 3.50 77.49 37.70 05Nov2017 9 a.m. 78.08 4.40 71.33 216.60 05Nov2017 10 a.m. 79.99 8.00 64.18 345.70 05Nov2017 11 a.m. 81.54 8.90 59.43 470.70 05Nov2017 12 p.m. 82.72 8.60 56.41 569.50 05Nov2017 1 p.m. 83.34 7.70 54.71 455.70 05Nov2017 2 p.m. 84.33 6.40 52.10 363.90 05Nov2017 3 p.m. 85.53 5.70 49.23 279.90 05Nov2017 4 p.m. 86.36 4.50 47.40 163.90 05Nov2017 5 p.m. 84.72 5.40 47.85 43.70 05Nov2017 6 p.m. 76.78 7.40 46.02 0.10 05Nov2017 7 p.m. 55.89 3.90 96.99 0.00 05Nov2017 8 p.m. 63.79 4.90 69.36 0.00 05Nov2017 9 p.m. 60.85 4.50 72.45 0.00 05Nov2017 10 p.m. 58.32 3.00 76.64 0.00 05Nov2017 11 p.m. 56.21 2.50 81.12 0.00 06Nov2017 12 a.m. 54.99 2.30 83.77 0.00 06Nov2017 1 a.m. 53.74 1.80 86.09 0.00 06Nov2017 2 a.m. 52.86 0.60 88.12 0.00 06Nov2017 3 a.m. 52.05 0.60 90.03 0.00 06Nov2017 4 a.m. 51.19 0.80 91.89 0.00 06Nov2017 5 a.m. 52.66 0.80 92.00 0.00 06Nov2017 6 a.m. 53.83 2.00 90.87 0.00 06Nov2017 7 a.m. 56.07 2.50 88.77 0.00 Accuml. Values 1621.47 100.70 1734.25 2947.40 Num. Valid Values 24 24 24 24 Avg. Values 67.56 4.20 72.26 122.81 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 19.76 162.03 72.26 253.42 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2774 definition: xcompl = 1 - (RELH_avg/100) TdC = 14.7034 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 = 0.6839 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3161 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.1917 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 = 6.2975 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.4936 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.115 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.