Detailed Weather Data for Project: HEYB

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 48.43 1.20 91.94 3.20 03Dec2017 9 a.m. 51.08 0.70 92.79 81.00 03Dec2017 10 a.m. 58.93 3.20 83.70 105.00 03Dec2017 11 a.m. 60.26 3.20 80.95 159.90 03Dec2017 12 p.m. 62.92 3.30 75.74 176.60 03Dec2017 1 p.m. 66.31 4.30 68.35 364.40 03Dec2017 2 p.m. 71.02 5.90 58.02 419.80 03Dec2017 3 p.m. 71.35 5.50 57.03 165.40 03Dec2017 4 p.m. 70.48 5.00 59.02 68.70 03Dec2017 5 p.m. 71.08 4.20 60.11 35.70 03Dec2017 6 p.m. 69.94 3.00 62.61 0.00 03Dec2017 7 p.m. 63.43 16.40 33.95 0.00 03Dec2017 8 p.m. 65.91 2.20 70.41 0.00 03Dec2017 9 p.m. 66.92 3.00 67.06 0.00 03Dec2017 10 p.m. 67.03 4.70 68.21 0.00 03Dec2017 11 p.m. 67.73 6.20 71.14 0.00 04Dec2017 12 a.m. 67.05 5.40 70.30 0.00 04Dec2017 1 a.m. 66.04 5.10 68.84 0.00 04Dec2017 2 a.m. 64.98 5.80 69.68 0.00 04Dec2017 3 a.m. 64.72 5.70 72.24 0.00 04Dec2017 4 a.m. 64.74 5.70 76.16 0.00 04Dec2017 5 a.m. 65.07 5.50 78.68 0.00 04Dec2017 6 a.m. 65.46 5.40 80.26 0.00 04Dec2017 7 a.m. 66.36 6.60 80.57 0.00 Accuml. Values 1557.25 117.20 1697.76 1579.70 Num. Valid Values 24 24 24 24 Avg. Values 64.89 4.88 70.74 65.82 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 18.27 188.57 70.74 135.82 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2926 definition: xcompl = 1 - (RELH_avg/100) TdC = 12.9482 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 = 0.6661 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3339 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.6002 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 = 6.0624 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.7217 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.078 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.