Detailed Weather Data for Project: KAWL

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 20.12 24.60 87.79 0.00 30Dec2017 9 a.m. 19.15 19.60 82.13 1.40 30Dec2017 10 a.m. 17.98 19.60 79.59 26.60 30Dec2017 11 a.m. 17.24 19.30 76.77 64.20 30Dec2017 12 p.m. 16.99 15.60 73.21 91.90 30Dec2017 1 p.m. 17.46 14.50 69.94 105.00 30Dec2017 2 p.m. 18.28 13.20 68.52 109.40 30Dec2017 3 p.m. 19.20 12.70 66.31 86.20 30Dec2017 4 p.m. 20.01 11.90 62.13 59.60 30Dec2017 5 p.m. 21.33 11.00 58.75 19.90 30Dec2017 6 p.m. 21.65 8.70 54.56 0.00 30Dec2017 7 p.m. 15.58 22.20 58.72 0.00 30Dec2017 8 p.m. 21.58 6.00 54.32 0.00 30Dec2017 9 p.m. 21.63 14.30 56.38 0.00 30Dec2017 10 p.m. 20.88 14.30 56.72 0.00 30Dec2017 11 p.m. 20.35 15.30 59.41 0.00 31Dec2017 12 a.m. 19.58 21.50 63.18 0.00 31Dec2017 1 a.m. 17.87 23.10 67.75 0.00 31Dec2017 2 a.m. 16.86 23.40 67.67 0.00 31Dec2017 3 a.m. 15.82 24.30 71.14 0.00 31Dec2017 4 a.m. 14.59 24.50 77.76 0.00 31Dec2017 5 a.m. 14.27 20.50 71.54 0.00 31Dec2017 6 a.m. 14.09 20.80 70.84 0.00 31Dec2017 7 a.m. 13.98 21.70 71.70 0.00 Accuml. Values 436.49 422.60 1626.83 564.20 Num. Valid Values 24 24 24 24 Avg. Values 18.19 17.61 67.78 23.51 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -7.67 679.96 67.78 48.51 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3222 definition: xcompl = 1 - (RELH_avg/100) TdC = -12.5687 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 = 0.2890 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7110 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.6462 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 = 1.1120 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.6261 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.066 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.