Detailed Weather Data for Project: SARD

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 22.71 20.20 89.17 0.00 31Dec2017 9 a.m. 22.91 17.40 88.81 3.10 31Dec2017 10 a.m. 22.17 20.20 87.27 19.60 31Dec2017 11 a.m. 21.27 21.00 82.20 60.10 31Dec2017 12 p.m. 21.58 26.70 77.81 158.30 31Dec2017 1 p.m. 22.23 25.20 75.88 201.80 31Dec2017 2 p.m. 22.82 18.80 67.98 279.60 31Dec2017 3 p.m. 25.65 21.20 55.95 371.70 31Dec2017 4 p.m. 26.67 18.00 52.71 181.30 31Dec2017 5 p.m. 26.22 14.80 50.57 40.40 31Dec2017 6 p.m. 25.00 14.40 50.62 0.00 31Dec2017 7 p.m. 21.13 13.60 46.24 0.00 31Dec2017 8 p.m. 22.17 17.00 50.52 0.00 31Dec2017 9 p.m. 20.84 19.90 51.74 0.00 31Dec2017 10 p.m. 19.89 15.60 52.74 0.00 31Dec2017 11 p.m. 19.09 12.00 55.70 0.00 01Jan2018 12 a.m. 18.18 13.30 58.36 0.00 01Jan2018 1 a.m. 17.37 14.00 61.36 0.00 01Jan2018 2 a.m. 16.52 14.70 63.69 0.00 01Jan2018 3 a.m. 15.85 13.30 67.49 0.00 01Jan2018 4 a.m. 15.21 11.40 70.02 0.00 01Jan2018 5 a.m. 14.40 14.50 71.31 0.00 01Jan2018 6 a.m. 13.66 12.80 72.52 0.00 01Jan2018 7 a.m. 12.85 11.40 72.16 0.00 Accuml. Values 486.37 401.40 1572.82 1315.90 Num. Valid Values 24 24 24 24 Avg. Values 20.27 16.72 65.53 54.83 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -6.52 645.85 65.53 113.14 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3447 definition: xcompl = 1 - (RELH_avg/100) TdC = -11.8831 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 = 0.3055 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6945 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.1122 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 = 1.3008 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.8901 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.