Detailed Weather Data for Project: BIGH

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 37.15 6.60 31.43 118.80 06Mar2018 9 a.m. 40.62 11.50 27.24 344.50 06Mar2018 10 a.m. 43.39 20.20 23.76 549.80 06Mar2018 11 a.m. 45.37 23.40 21.52 707.30 06Mar2018 12 p.m. 46.24 24.10 20.85 744.30 06Mar2018 1 p.m. 45.86 20.50 24.31 676.10 06Mar2018 2 p.m. 44.64 23.30 27.31 654.40 06Mar2018 3 p.m. 42.73 22.30 33.74 544.90 06Mar2018 4 p.m. 38.53 19.60 46.08 299.70 06Mar2018 5 p.m. 37.17 21.30 42.78 265.20 06Mar2018 6 p.m. 36.30 16.00 43.05 64.60 06Mar2018 7 p.m. 43.50 4.60 21.55 0.30 06Mar2018 8 p.m. 33.84 11.40 44.44 0.00 06Mar2018 9 p.m. 32.70 8.10 47.56 0.00 06Mar2018 10 p.m. 32.70 9.20 48.19 0.00 06Mar2018 11 p.m. 32.09 9.10 49.59 0.00 07Mar2018 12 a.m. 30.81 6.40 53.18 0.00 07Mar2018 1 a.m. 29.34 5.40 57.92 0.00 07Mar2018 2 a.m. 29.10 6.40 58.62 0.00 07Mar2018 3 a.m. 29.21 6.60 58.89 0.00 07Mar2018 4 a.m. 29.03 5.50 58.78 0.00 07Mar2018 5 a.m. 28.89 5.70 58.12 0.00 07Mar2018 6 a.m. 28.96 4.40 59.46 0.00 07Mar2018 7 a.m. 28.81 5.80 59.52 0.00 Accuml. Values 866.98 297.40 1017.89 4969.90 Num. Valid Values 24 24 24 24 Avg. Values 36.12 12.39 42.41 207.08 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 2.29 478.52 42.41 427.31 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5759 definition: xcompl = 1 - (RELH_avg/100) TdC = -9.2873 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 = 0.4389 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5611 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.3542 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 = 4.2030 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.3953 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.199 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.