Detailed Weather Data for Project: HUDS

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 32.65 2.30 48.94 0.00 29Dec2017 9 a.m. 33.04 2.40 49.60 13.20 29Dec2017 10 a.m. 34.16 1.20 49.44 28.30 29Dec2017 11 a.m. 35.28 1.40 49.06 65.00 29Dec2017 12 p.m. 37.54 1.40 47.20 73.50 29Dec2017 1 p.m. 39.31 2.00 48.62 107.90 29Dec2017 2 p.m. 39.83 3.00 50.38 97.20 29Dec2017 3 p.m. 41.40 1.80 49.92 114.70 29Dec2017 4 p.m. 43.39 3.10 49.39 47.30 29Dec2017 5 p.m. 43.45 3.20 53.40 19.00 29Dec2017 6 p.m. 41.58 1.10 60.00 0.00 29Dec2017 7 p.m. 25.90 7.50 69.97 0.00 29Dec2017 8 p.m. 39.76 1.50 68.06 0.00 29Dec2017 9 p.m. 40.08 0.70 69.69 0.00 29Dec2017 10 p.m. 40.12 0.40 71.43 0.00 29Dec2017 11 p.m. 40.73 1.20 71.37 0.00 30Dec2017 12 a.m. 40.06 1.10 73.74 0.00 30Dec2017 1 a.m. 40.06 2.30 74.13 0.00 30Dec2017 2 a.m. 40.33 2.80 73.46 0.00 30Dec2017 3 a.m. 40.03 2.90 74.01 0.00 30Dec2017 4 a.m. 39.58 3.70 75.52 0.00 30Dec2017 5 a.m. 37.98 8.00 77.51 0.00 30Dec2017 6 a.m. 32.59 9.80 81.26 0.00 30Dec2017 7 a.m. 30.29 10.60 87.47 0.00 Accuml. Values 909.14 75.40 1523.57 566.10 Num. Valid Values 24 24 24 24 Avg. Values 37.88 3.14 63.48 23.59 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.27 121.32 63.48 48.67 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3652 definition: xcompl = 1 - (RELH_avg/100) TdC = -2.9643 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 = 0.4540 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5460 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.5868 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 = 2.8245 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.9246 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.031 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.