Detailed Weather Data for Project: CHOU

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 34.70 11.00 46.36 0.00 05Dec2017 9 a.m. 34.66 10.30 44.40 23.10 05Dec2017 10 a.m. 35.08 8.60 43.48 40.40 05Dec2017 11 a.m. 35.35 8.20 42.13 45.50 05Dec2017 12 p.m. 36.34 8.00 41.15 160.30 05Dec2017 1 p.m. 38.19 7.90 37.39 258.20 05Dec2017 2 p.m. 39.69 7.30 36.36 298.10 05Dec2017 3 p.m. 41.09 5.20 33.12 228.00 05Dec2017 4 p.m. 41.59 3.00 30.62 158.50 05Dec2017 5 p.m. 41.07 1.70 31.33 55.80 05Dec2017 6 p.m. 38.46 0.80 36.96 0.00 05Dec2017 7 p.m. 45.64 3.40 41.60 0.00 05Dec2017 8 p.m. 35.01 1.60 49.79 0.00 05Dec2017 9 p.m. 34.07 1.90 46.31 0.00 05Dec2017 10 p.m. 33.04 1.70 54.84 0.00 05Dec2017 11 p.m. 31.98 2.10 52.65 0.00 06Dec2017 12 a.m. 31.71 1.40 61.42 0.00 06Dec2017 1 a.m. 31.08 1.90 59.07 0.00 06Dec2017 2 a.m. 30.58 1.50 59.32 0.00 06Dec2017 3 a.m. 30.45 2.60 57.44 0.00 06Dec2017 4 a.m. 29.97 2.90 57.60 0.00 06Dec2017 5 a.m. 29.52 3.00 58.79 0.00 06Dec2017 6 a.m. 29.71 1.70 61.55 0.00 06Dec2017 7 a.m. 27.55 0.40 71.61 0.00 Accuml. Values 836.54 98.10 1155.29 1267.90 Num. Valid Values 24 24 24 24 Avg. Values 34.86 4.09 48.14 52.83 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 1.59 157.84 48.14 109.01 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5186 definition: xcompl = 1 - (RELH_avg/100) TdC = -8.2637 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 = 0.4280 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5720 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.0491 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 = 3.5928 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.7049 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.060 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.