Detailed Weather Data for Project: KAWL

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. 2.93 12.90 81.42 7.00 01Jan2018 9 a.m. 3.29 11.30 80.60 147.60 01Jan2018 10 a.m. 4.17 9.60 79.40 340.60 01Jan2018 11 a.m. 5.68 8.80 69.37 416.60 01Jan2018 12 p.m. 8.26 6.80 58.82 500.40 01Jan2018 1 p.m. 10.49 7.50 56.08 514.00 01Jan2018 2 p.m. 12.33 8.70 52.70 465.50 01Jan2018 3 p.m. 14.49 9.00 46.89 398.70 01Jan2018 4 p.m. 15.87 7.00 42.50 267.90 01Jan2018 5 p.m. 16.36 8.40 40.56 97.70 01Jan2018 6 p.m. 15.21 8.10 39.60 0.00 01Jan2018 7 p.m. 21.02 6.50 36.63 0.00 01Jan2018 8 p.m. 13.24 10.20 50.22 0.00 01Jan2018 9 p.m. 11.86 8.80 51.92 0.00 01Jan2018 10 p.m. 12.13 7.10 49.26 0.00 01Jan2018 11 p.m. 12.63 5.80 47.14 0.00 02Jan2018 12 a.m. 12.76 5.20 46.27 0.00 02Jan2018 1 a.m. 12.76 7.30 48.12 0.00 02Jan2018 2 a.m. 12.65 7.00 49.45 0.00 02Jan2018 3 a.m. 12.63 6.50 51.73 0.00 02Jan2018 4 a.m. 12.40 5.70 53.49 0.00 02Jan2018 5 a.m. 12.49 7.00 54.36 0.00 02Jan2018 6 a.m. 12.56 8.30 52.59 0.00 02Jan2018 7 a.m. 12.72 6.30 52.03 0.00 Accuml. Values 280.92 189.80 1291.15 3156.00 Num. Valid Values 24 24 24 24 Avg. Values 11.70 7.91 53.80 131.50 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -11.28 305.39 53.80 271.35 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4620 definition: xcompl = 1 - (RELH_avg/100) TdC = -18.8035 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 = 0.2400 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7600 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.1951 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 = 1.2065 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.5402 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.057 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.