Detailed Weather Data for Project: HUDS

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 33.75 6.20 67.67 25.10 07Mar2018 9 a.m. 34.65 6.70 63.69 120.30 07Mar2018 10 a.m. 35.58 6.50 59.95 249.10 07Mar2018 11 a.m. 37.06 6.80 58.29 196.60 07Mar2018 12 p.m. 39.31 6.40 54.35 27.40 07Mar2018 1 p.m. 41.38 8.30 49.17 19.40 07Mar2018 2 p.m. 43.88 8.10 44.83 17.40 07Mar2018 3 p.m. 46.38 8.40 40.16 20.30 07Mar2018 4 p.m. 48.65 8.10 36.20 18.00 07Mar2018 5 p.m. 50.47 7.70 30.96 11.80 07Mar2018 6 p.m. 50.85 7.60 28.33 1.00 07Mar2018 7 p.m. 54.46 0.70 29.65 0.00 07Mar2018 8 p.m. 46.40 1.00 44.90 0.00 07Mar2018 9 p.m. 43.23 0.30 52.00 0.00 07Mar2018 10 p.m. 40.57 2.00 43.61 0.00 07Mar2018 11 p.m. 38.55 1.10 51.89 0.00 08Mar2018 12 a.m. 36.36 1.00 70.10 0.00 08Mar2018 1 a.m. 36.28 1.70 76.00 0.00 08Mar2018 2 a.m. 32.68 2.20 66.33 0.00 08Mar2018 3 a.m. 32.41 0.60 70.18 0.00 08Mar2018 4 a.m. 31.55 1.20 85.01 0.00 08Mar2018 5 a.m. 30.38 1.00 86.86 0.00 08Mar2018 6 a.m. 30.60 0.60 87.65 0.00 08Mar2018 7 a.m. 32.56 3.70 77.33 0.70 Accuml. Values 947.98 97.90 1375.11 707.10 Num. Valid Values 24 24 24 24 Avg. Values 39.50 4.08 57.30 29.46 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.17 157.52 57.30 60.80 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4270 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.5100 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 = 0.4678 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5322 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.4682 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 = 3.5291 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.6598 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.047 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.