Detailed Weather Data for Project: JOHN

Date Time TAIR WSPD RELH SRAD 06Nov2017 8 a.m. 33.31 9.70 84.92 52.40 06Nov2017 9 a.m. 34.25 11.00 81.10 93.50 06Nov2017 10 a.m. 35.33 10.70 80.23 167.70 06Nov2017 11 a.m. 37.63 9.10 72.40 292.10 06Nov2017 12 p.m. 40.95 8.60 61.98 264.20 06Nov2017 1 p.m. 43.29 9.70 56.19 160.20 06Nov2017 2 p.m. 43.81 7.80 57.34 101.50 06Nov2017 3 p.m. 44.37 8.50 59.08 74.20 06Nov2017 4 p.m. 44.17 9.40 61.94 40.70 06Nov2017 5 p.m. 43.72 9.00 63.22 4.90 06Nov2017 6 p.m. 43.00 8.50 69.50 0.00 06Nov2017 7 p.m. 42.76 11.70 52.27 0.00 06Nov2017 8 p.m. 40.93 8.30 94.09 0.00 06Nov2017 9 p.m. 40.60 6.80 97.95 0.00 06Nov2017 10 p.m. 40.46 6.70 96.03 0.00 06Nov2017 11 p.m. 40.62 6.10 95.27 0.00 07Nov2017 12 a.m. 40.75 6.70 93.06 0.00 07Nov2017 1 a.m. 40.23 8.10 96.00 0.00 07Nov2017 2 a.m. 40.12 7.70 97.64 0.00 07Nov2017 3 a.m. 40.33 8.20 98.38 0.00 07Nov2017 4 a.m. 40.64 11.60 94.87 0.00 07Nov2017 5 a.m. 40.78 15.80 87.98 0.00 07Nov2017 6 a.m. 40.55 14.30 82.31 0.00 07Nov2017 7 a.m. 39.72 12.40 82.93 0.00 Accuml. Values 972.32 226.40 1916.68 1251.40 Num. Valid Values 24 24 24 24 Avg. Values 40.51 9.43 79.86 52.14 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.73 364.28 79.86 107.60 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2014 definition: xcompl = 1 - (RELH_avg/100) TdC = 1.5581 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 = 0.4764 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5236 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.0147 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 = 1.7287 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.3900 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.049 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.