Detailed Weather Data for Project: FCOB

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 33.53 13.09 90.75 0.75 29Dec2017 9 a.m. 33.62 15.73 89.33 13.67 29Dec2017 10 a.m. 34.16 16.50 87.00 39.75 29Dec2017 11 a.m. 35.90 16.78 83.33 103.00 29Dec2017 12 p.m. 38.42 20.65 78.00 189.67 29Dec2017 1 p.m. 39.08 15.88 78.00 143.00 29Dec2017 2 p.m. 39.87 17.73 78.25 153.50 29Dec2017 3 p.m. 40.59 14.99 77.50 114.75 29Dec2017 4 p.m. 41.63 11.02 75.50 116.25 29Dec2017 5 p.m. 42.35 9.12 74.25 122.75 29Dec2017 6 p.m. 35.78 9.17 87.00 0.00 29Dec2017 7 p.m. 33.80 5.14 91.00 0.00 29Dec2017 8 p.m. 34.16 3.24 95.00 0.00 29Dec2017 9 p.m. 32.60 3.58 97.00 0.00 29Dec2017 10 p.m. 32.66 2.98 98.67 0.00 29Dec2017 11 p.m. 30.38 2.68 99.00 0.00 30Dec2017 12 a.m. 32.72 3.63 98.50 0.00 30Dec2017 1 a.m. 31.42 4.31 98.25 0.00 30Dec2017 2 a.m. 32.76 7.05 98.00 0.00 30Dec2017 3 a.m. 30.08 19.46 91.33 0.00 30Dec2017 4 a.m. 28.31 16.66 87.75 0.00 30Dec2017 5 a.m. 26.87 17.56 86.00 0.00 30Dec2017 6 a.m. 25.12 19.07 84.50 0.00 30Dec2017 7 a.m. 23.18 20.24 82.50 0.00 Accuml. Values 808.99 286.26 2106.41 997.09 Num. Valid Values 24 24 24 24 Avg. Values 33.71 11.93 87.77 41.55 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 0.95 460.59 87.77 85.73 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1223 definition: xcompl = 1 - (RELH_avg/100) TdC = -0.8731 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 = 0.4182 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5818 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2713 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 = 0.8156 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.4675 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.029 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.