Detailed Weather Data for Project: BIRC

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 62.76 15.54 78.67 0.10 04Dec2017 9 a.m. 63.48 17.24 77.98 0.10 04Dec2017 10 a.m. 64.83 16.29 74.75 0.10 04Dec2017 11 a.m. 67.17 17.63 68.46 0.10 04Dec2017 12 p.m. 68.94 12.59 62.00 0.11 04Dec2017 1 p.m. 70.07 10.94 56.47 0.11 04Dec2017 2 p.m. 71.67 10.26 49.46 0.42 04Dec2017 3 p.m. 72.86 9.96 40.90 93.17 04Dec2017 4 p.m. 68.09 10.03 37.23 92.80 04Dec2017 5 p.m. 61.81 6.94 34.84 0.10 04Dec2017 6 p.m. 60.44 5.78 32.84 0.10 04Dec2017 7 p.m. 38.95 3.38 35.13 0.11 04Dec2017 8 p.m. 54.25 9.37 32.84 0.11 04Dec2017 9 p.m. 49.91 8.11 35.95 0.10 04Dec2017 10 p.m. 46.63 7.59 35.31 0.11 04Dec2017 11 p.m. 43.59 8.25 37.99 0.11 05Dec2017 12 a.m. 41.31 6.33 42.25 0.12 05Dec2017 1 a.m. 39.58 5.72 44.41 0.11 05Dec2017 2 a.m. 37.94 5.90 43.63 0.11 05Dec2017 3 a.m. 35.94 6.88 40.41 0.11 05Dec2017 4 a.m. 33.08 5.91 35.30 0.10 05Dec2017 5 a.m. 31.95 5.56 35.57 0.10 05Dec2017 6 a.m. 31.55 5.40 37.27 0.10 05Dec2017 7 a.m. 31.78 4.23 37.42 0.10 Accuml. Values 1248.58 215.83 1107.08 188.60 Num. Valid Values 24 24 24 24 Avg. Values 52.02 8.99 46.13 7.86 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 11.12 347.27 46.13 16.22 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5387 definition: xcompl = 1 - (RELH_avg/100) TdC = -0.0783 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 = 0.5714 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4286 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.8571 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 = 7.1775 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.0855 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.117 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.