Detailed Weather Data for Project: CHEN

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 34.07 13.23 65.51 24.00 06Dec2017 9 a.m. 36.37 11.99 62.28 147.00 06Dec2017 10 a.m. 39.79 21.02 61.42 356.00 06Dec2017 11 a.m. 40.87 18.34 56.84 484.00 06Dec2017 12 p.m. 42.85 25.04 49.76 571.00 06Dec2017 1 p.m. 43.41 23.77 46.28 548.00 06Dec2017 2 p.m. 44.51 24.37 45.55 513.00 06Dec2017 3 p.m. 45.05 24.19 43.28 391.00 06Dec2017 4 p.m. 45.82 22.54 43.59 201.00 06Dec2017 5 p.m. 44.94 20.74 43.65 36.00 06Dec2017 6 p.m. 42.75 15.67 49.33 0.00 06Dec2017 7 p.m. 23.52 5.02 42.62 0.00 06Dec2017 8 p.m. 35.71 15.67 67.09 0.00 06Dec2017 9 p.m. 34.18 20.50 65.94 0.00 06Dec2017 10 p.m. 30.00 23.48 61.12 0.00 06Dec2017 11 p.m. 28.36 17.88 61.91 0.00 07Dec2017 12 a.m. 25.93 17.77 65.64 0.00 07Dec2017 1 a.m. 24.08 19.60 69.48 0.00 07Dec2017 2 a.m. 24.30 19.85 74.37 0.00 07Dec2017 3 a.m. 23.65 24.65 79.63 0.00 07Dec2017 4 a.m. 22.86 25.04 80.96 0.00 07Dec2017 5 a.m. 21.99 23.42 85.60 0.00 07Dec2017 6 a.m. 21.00 25.11 89.40 0.00 07Dec2017 7 a.m. 20.23 23.35 87.45 1.00 Accuml. Values 796.26 482.24 1498.70 3272.00 Num. Valid Values 24 24 24 24 Avg. Values 33.18 20.09 62.45 136.33 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 0.65 775.92 62.45 281.33 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3755 definition: xcompl = 1 - (RELH_avg/100) TdC = -5.6701 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 = 0.4136 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5864 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.6374 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 = 2.4146 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.8003 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.161 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.