Detailed Weather Data for Project: HUDS

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 16.57 9.30 67.05 2.50 31Dec2017 9 a.m. 15.80 9.30 65.91 43.50 31Dec2017 10 a.m. 15.87 10.10 62.75 168.90 31Dec2017 11 a.m. 16.92 9.70 57.37 300.10 31Dec2017 12 p.m. 18.03 10.80 50.63 26.80 31Dec2017 1 p.m. 19.26 10.10 44.20 25.80 31Dec2017 2 p.m. 20.25 11.50 41.05 24.60 31Dec2017 3 p.m. 20.89 10.70 39.79 41.70 31Dec2017 4 p.m. 20.41 11.50 42.18 7.10 31Dec2017 5 p.m. 19.92 11.50 45.15 8.10 31Dec2017 6 p.m. 19.47 10.50 50.25 0.00 31Dec2017 7 p.m. 16.11 4.20 50.66 0.00 31Dec2017 8 p.m. 17.85 9.90 56.48 0.00 31Dec2017 9 p.m. 17.06 10.30 57.57 0.00 31Dec2017 10 p.m. 16.30 10.50 59.32 0.00 31Dec2017 11 p.m. 15.33 10.30 60.52 0.00 01Jan2018 12 a.m. 14.36 9.00 62.16 0.00 01Jan2018 1 a.m. 12.97 6.90 64.61 0.00 01Jan2018 2 a.m. 11.55 6.90 66.22 0.00 01Jan2018 3 a.m. 9.99 6.60 67.82 0.00 01Jan2018 4 a.m. 8.98 6.70 69.44 0.00 01Jan2018 5 a.m. 8.74 7.30 74.85 0.00 01Jan2018 6 a.m. 7.50 5.90 75.87 0.00 01Jan2018 7 a.m. 6.19 7.30 75.67 0.00 Accuml. Values 366.33 216.80 1407.52 649.10 Num. Valid Values 24 24 24 24 Avg. Values 15.26 9.03 58.65 27.05 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -9.30 348.83 58.65 55.81 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4135 definition: xcompl = 1 - (RELH_avg/100) TdC = -15.8975 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 = 0.2664 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7336 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.5952 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 = 1.2611 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.7558 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.044 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.