Detailed Weather Data for Project: COPA

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 54.77 11.10 48.36 10.54 04Mar2018 9 a.m. 56.07 12.04 47.43 67.02 04Mar2018 10 a.m. 56.59 11.84 49.11 66.50 04Mar2018 11 a.m. 57.34 14.29 48.92 123.21 04Mar2018 12 p.m. 58.69 15.29 48.61 203.48 04Mar2018 1 p.m. 58.17 15.12 49.28 173.08 04Mar2018 2 p.m. 58.75 16.48 49.07 359.24 04Mar2018 3 p.m. 58.73 15.14 53.38 203.09 04Mar2018 4 p.m. 57.11 13.50 59.95 86.80 04Mar2018 5 p.m. 55.71 12.11 64.46 28.07 04Mar2018 6 p.m. 55.44 12.31 65.17 5.10 04Mar2018 7 p.m. 53.20 5.45 28.09 1.94 04Mar2018 8 p.m. 54.59 12.79 69.01 0.00 04Mar2018 9 p.m. 54.39 12.21 73.22 0.00 04Mar2018 10 p.m. 54.50 13.95 80.10 0.00 04Mar2018 11 p.m. 54.48 13.86 81.77 0.00 05Mar2018 12 a.m. 54.73 13.03 82.02 0.00 05Mar2018 1 a.m. 54.61 10.59 80.85 0.00 05Mar2018 2 a.m. 54.14 10.51 79.80 0.00 05Mar2018 3 a.m. 54.68 11.03 78.90 0.00 05Mar2018 4 a.m. 55.67 10.33 79.77 0.00 05Mar2018 5 a.m. 56.98 6.28 82.45 0.00 05Mar2018 6 a.m. 59.41 5.82 87.34 0.00 05Mar2018 7 a.m. 59.23 7.98 83.33 0.00 Accuml. Values 1348.00 283.05 1570.39 1328.07 Num. Valid Values 24 24 24 24 Avg. Values 56.17 11.79 65.43 55.34 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.43 455.43 65.43 114.19 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3457 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.1463 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 = 0.6034 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3966 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.2199 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 = 5.2839 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.5324 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.123 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.