Detailed Weather Data for Project: TOMS

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 22.60 20.36 88.50 1.25 30Dec2017 9 a.m. 20.78 23.71 89.00 17.00 30Dec2017 10 a.m. 19.94 23.71 89.25 43.00 30Dec2017 11 a.m. 19.22 25.05 89.67 97.67 30Dec2017 12 p.m. 18.73 19.74 90.75 100.50 30Dec2017 1 p.m. 18.80 18.72 89.67 121.67 30Dec2017 2 p.m. 19.45 14.99 87.00 133.50 30Dec2017 3 p.m. 18.68 12.69 88.50 77.75 30Dec2017 4 p.m. 19.13 11.63 87.25 62.00 30Dec2017 5 p.m. 19.00 11.24 86.25 27.00 30Dec2017 6 p.m. 18.50 10.96 86.00 0.00 30Dec2017 7 p.m. 17.96 11.18 85.00 0.00 30Dec2017 8 p.m. 18.05 8.39 85.50 0.00 30Dec2017 9 p.m. 17.72 8.28 89.00 0.00 30Dec2017 10 p.m. 17.56 7.38 92.50 0.00 30Dec2017 11 p.m. 17.83 5.76 93.50 0.00 31Dec2017 12 a.m. 18.19 6.60 94.00 0.00 31Dec2017 1 a.m. 18.37 9.67 94.75 0.00 31Dec2017 2 a.m. 18.41 15.10 94.75 0.00 31Dec2017 3 a.m. 18.26 14.84 93.00 0.00 31Dec2017 4 a.m. 17.74 16.50 89.75 0.00 31Dec2017 5 a.m. 17.51 16.89 88.50 0.00 31Dec2017 6 a.m. 16.39 18.29 87.25 0.00 31Dec2017 7 a.m. 15.17 21.03 86.50 0.00 Accuml. Values 443.99 352.71 2145.84 681.34 Num. Valid Values 24 24 24 24 Avg. Values 18.50 14.70 89.41 28.39 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -7.50 567.51 89.41 58.58 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1059 definition: xcompl = 1 - (RELH_avg/100) TdC = -8.9679 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 = 0.2915 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7085 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.5658 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 = 0.3789 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.8795 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.018 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.