Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 14.81 15.32 78.75 1.50 31Dec2017 9 a.m. 14.72 13.72 75.67 32.67 31Dec2017 10 a.m. 15.26 16.25 72.33 92.33 31Dec2017 11 a.m. 16.04 16.33 68.00 156.33 31Dec2017 12 p.m. 17.60 18.29 63.25 257.00 31Dec2017 1 p.m. 20.12 17.60 56.00 480.33 31Dec2017 2 p.m. 21.65 18.17 49.25 488.00 31Dec2017 3 p.m. 22.73 16.22 42.00 495.00 31Dec2017 4 p.m. 21.88 14.48 38.25 287.25 31Dec2017 5 p.m. 19.94 15.77 37.00 100.00 31Dec2017 6 p.m. 16.16 12.30 41.00 0.00 31Dec2017 7 p.m. 14.36 8.28 45.00 0.00 31Dec2017 8 p.m. 13.64 7.61 48.00 0.00 31Dec2017 9 p.m. 13.19 7.16 49.50 0.00 31Dec2017 10 p.m. 11.60 5.00 55.00 0.00 31Dec2017 11 p.m. 12.20 7.05 53.75 0.00 01Jan2018 12 a.m. 11.93 7.94 52.75 0.00 01Jan2018 1 a.m. 11.35 9.56 53.25 0.00 01Jan2018 2 a.m. 10.22 8.84 55.00 0.00 01Jan2018 3 a.m. 9.68 8.43 56.33 0.00 01Jan2018 4 a.m. 8.78 11.63 56.33 0.00 01Jan2018 5 a.m. 7.61 11.86 58.00 0.00 01Jan2018 6 a.m. 6.85 10.35 59.50 0.00 01Jan2018 7 a.m. 6.35 10.07 61.00 0.00 Accuml. Values 338.67 288.23 1324.91 2390.41 Num. Valid Values 24 24 24 24 Avg. Values 14.11 12.01 55.20 99.60 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -9.94 463.76 55.20 205.53 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4480 definition: xcompl = 1 - (RELH_avg/100) TdC = -17.2391 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 = 0.2577 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7423 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.6354 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 = 1.3007 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.2244 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.071 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.