Detailed Weather Data for Project: WEBB

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 24.10 1.20 88.43 0.60 06Dec2017 9 a.m. 28.65 2.00 86.87 155.10 06Dec2017 10 a.m. 34.90 2.40 74.95 359.10 06Dec2017 11 a.m. 39.88 3.90 52.99 500.90 06Dec2017 12 p.m. 42.75 4.90 45.74 596.70 06Dec2017 1 p.m. 46.42 3.90 40.71 606.40 06Dec2017 2 p.m. 50.56 6.70 33.44 559.70 06Dec2017 3 p.m. 52.14 7.10 29.36 451.20 06Dec2017 4 p.m. 51.96 9.00 31.54 251.90 06Dec2017 5 p.m. 51.66 7.20 33.96 58.00 06Dec2017 6 p.m. 48.04 2.00 39.01 0.00 06Dec2017 7 p.m. 31.51 6.20 43.64 0.00 06Dec2017 8 p.m. 41.52 2.10 60.65 0.00 06Dec2017 9 p.m. 40.10 1.80 68.15 0.00 06Dec2017 10 p.m. 37.56 2.50 76.80 0.00 06Dec2017 11 p.m. 36.82 2.50 79.18 0.00 07Dec2017 12 a.m. 36.16 3.40 82.76 0.00 07Dec2017 1 a.m. 35.85 4.80 86.76 0.00 07Dec2017 2 a.m. 35.22 6.80 78.77 0.00 07Dec2017 3 a.m. 34.99 10.10 66.30 0.00 07Dec2017 4 a.m. 34.07 13.20 67.68 0.00 07Dec2017 5 a.m. 31.46 14.00 61.40 0.00 07Dec2017 6 a.m. 29.28 12.60 59.12 0.00 07Dec2017 7 a.m. 28.45 10.30 61.02 0.00 Accuml. Values 924.06 140.60 1449.23 3539.60 Num. Valid Values 24 24 24 24 Avg. Values 38.50 5.86 60.38 147.48 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.61 226.23 60.38 304.33 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3962 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.3159 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 = 0.4593 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5407 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.0078 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 = 3.1440 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.9487 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.099 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.