Detailed Weather Data for Project: KAWL

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. 39.15 15.70 72.57 0.00 08Nov2017 9 a.m. 39.27 15.10 71.85 74.40 08Nov2017 10 a.m. 41.63 11.90 66.33 385.90 08Nov2017 11 a.m. 45.23 10.50 60.96 538.40 08Nov2017 12 p.m. 47.97 10.70 56.57 606.20 08Nov2017 1 p.m. 49.64 11.70 53.43 609.20 08Nov2017 2 p.m. 51.13 7.70 47.29 550.70 08Nov2017 3 p.m. 52.95 7.10 41.38 437.50 08Nov2017 4 p.m. 54.82 4.20 35.25 282.00 08Nov2017 5 p.m. 54.97 3.00 32.99 107.30 08Nov2017 6 p.m. 52.66 4.10 35.51 1.10 08Nov2017 7 p.m. 53.13 1.60 67.81 0.00 08Nov2017 8 p.m. 47.50 1.20 62.86 0.00 08Nov2017 9 p.m. 41.49 2.20 76.49 0.00 08Nov2017 10 p.m. 39.00 2.70 80.29 0.00 08Nov2017 11 p.m. 39.45 2.10 68.41 0.00 09Nov2017 12 a.m. 37.62 2.10 78.54 0.00 09Nov2017 1 a.m. 38.28 1.90 72.77 0.00 09Nov2017 2 a.m. 33.73 2.90 93.21 0.00 09Nov2017 3 a.m. 33.62 3.70 90.15 0.00 09Nov2017 4 a.m. 32.90 3.70 90.10 0.00 09Nov2017 5 a.m. 31.80 3.70 96.34 0.00 09Nov2017 6 a.m. 33.17 1.50 96.82 0.00 09Nov2017 7 a.m. 32.95 2.40 94.32 0.00 Accuml. Values 1024.07 133.40 1642.24 3592.70 Num. Valid Values 24 24 24 24 Avg. Values 42.67 5.56 68.43 149.70 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 5.93 214.64 68.43 308.90 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3157 definition: xcompl = 1 - (RELH_avg/100) TdC = 0.6035 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 = 0.4947 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5053 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.1672 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 = 2.9313 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.6858 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.096 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.