Detailed Weather Data for Project: BIRC

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 26.42 3.79 71.68 130.07 07Mar2018 9 a.m. 30.60 5.01 60.18 363.28 07Mar2018 10 a.m. 33.87 5.83 54.06 27.37 07Mar2018 11 a.m. 36.77 5.11 47.72 0.11 07Mar2018 12 p.m. 40.53 5.96 42.31 0.11 07Mar2018 1 p.m. 43.68 7.00 36.26 0.10 07Mar2018 2 p.m. 46.74 6.98 27.12 0.10 07Mar2018 3 p.m. 49.19 7.17 20.01 0.10 07Mar2018 4 p.m. 50.27 6.61 18.54 0.10 07Mar2018 5 p.m. 50.72 5.16 17.40 0.10 07Mar2018 6 p.m. 49.68 5.79 17.96 0.11 07Mar2018 7 p.m. 52.86 6.27 26.34 0.10 07Mar2018 8 p.m. 43.41 0.65 33.50 0.11 07Mar2018 9 p.m. 39.04 1.01 59.24 0.11 07Mar2018 10 p.m. 36.32 1.80 64.33 0.12 07Mar2018 11 p.m. 34.21 1.27 61.57 0.12 08Mar2018 12 a.m. 29.95 2.43 63.98 0.12 08Mar2018 1 a.m. 31.37 1.08 60.72 0.11 08Mar2018 2 a.m. 29.44 1.38 63.96 0.11 08Mar2018 3 a.m. 26.67 1.90 69.29 0.11 08Mar2018 4 a.m. 25.93 0.56 70.69 0.11 08Mar2018 5 a.m. 24.69 0.43 73.84 0.11 08Mar2018 6 a.m. 25.27 0.04 73.91 0.11 08Mar2018 7 a.m. 25.83 1.19 64.79 0.11 Accuml. Values 883.47 84.42 1199.40 523.00 Num. Valid Values 24 24 24 24 Avg. Values 36.81 3.52 49.98 21.79 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 2.67 135.83 49.98 44.97 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5002 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.7595 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 = 0.4448 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5552 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.6241 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 = 3.7397 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.5982 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.046 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.