Detailed Weather Data for Project: BIGH

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 39.42 6.90 67.15 83.10 03Mar2018 9 a.m. 42.48 9.40 62.65 281.70 03Mar2018 10 a.m. 47.93 9.20 55.18 462.00 03Mar2018 11 a.m. 52.86 11.40 48.34 605.90 03Mar2018 12 p.m. 57.69 12.70 41.15 706.40 03Mar2018 1 p.m. 60.39 13.30 37.77 720.20 03Mar2018 2 p.m. 62.58 12.40 35.92 783.70 03Mar2018 3 p.m. 63.63 12.50 35.97 533.10 03Mar2018 4 p.m. 64.54 12.10 35.50 452.10 03Mar2018 5 p.m. 64.26 12.10 35.70 297.60 03Mar2018 6 p.m. 63.12 10.80 37.67 99.80 03Mar2018 7 p.m. 52.52 10.20 66.55 0.00 03Mar2018 8 p.m. 56.55 6.70 50.06 0.00 03Mar2018 9 p.m. 54.52 7.10 52.43 0.00 03Mar2018 10 p.m. 52.92 8.40 52.67 0.00 03Mar2018 11 p.m. 51.53 8.70 51.77 0.00 04Mar2018 12 a.m. 50.67 8.40 48.96 0.00 04Mar2018 1 a.m. 49.24 6.00 50.03 0.00 04Mar2018 2 a.m. 47.70 6.10 52.29 0.00 04Mar2018 3 a.m. 45.66 5.60 57.22 0.00 04Mar2018 4 a.m. 45.12 7.70 58.82 0.00 04Mar2018 5 a.m. 45.79 8.10 56.82 0.00 04Mar2018 6 a.m. 45.95 7.50 57.83 0.00 04Mar2018 7 a.m. 46.18 7.40 59.60 0.00 Accuml. Values 1263.23 220.70 1208.05 5025.60 Num. Valid Values 24 24 24 24 Avg. Values 52.63 9.20 50.34 209.40 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 11.46 355.11 50.34 432.10 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4966 definition: xcompl = 1 - (RELH_avg/100) TdC = 1.4832 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 = 0.5762 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4238 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.0476 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 = 6.7496 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.7817 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.222 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.