Detailed Weather Data for Project: MERE

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. -0.56 7.00 91.00 24.00 08Nov2017 9 a.m. 0.56 2.00 82.00 86.00 08Nov2017 10 a.m. 2.22 4.00 74.00 141.00 08Nov2017 11 a.m. 3.33 5.00 65.00 265.00 08Nov2017 12 p.m. 5.56 3.00 57.00 409.00 08Nov2017 1 p.m. 7.78 2.00 52.00 555.00 08Nov2017 2 p.m. 8.89 3.00 48.00 489.00 08Nov2017 3 p.m. 10.00 3.00 49.00 415.00 08Nov2017 4 p.m. 10.00 2.00 49.00 261.00 08Nov2017 5 p.m. 8.89 0.00 52.00 91.00 08Nov2017 6 p.m. -901.00 -901.00 -901.00 -901.00 08Nov2017 7 p.m. 11.67 11.00 49.00 2.00 08Nov2017 8 p.m. 3.33 4.00 74.00 0.00 08Nov2017 9 p.m. 0.56 6.00 86.00 0.00 08Nov2017 10 p.m. 0.00 3.00 89.00 0.00 08Nov2017 11 p.m. 1.11 5.00 87.00 0.00 09Nov2017 12 a.m. 0.56 4.00 89.00 0.00 09Nov2017 1 a.m. 0.56 5.00 90.00 0.00 09Nov2017 2 a.m. 0.00 1.00 92.00 0.00 09Nov2017 3 a.m. -0.56 0.00 93.00 0.00 09Nov2017 4 a.m. -1.67 2.00 91.00 0.00 09Nov2017 5 a.m. -1.11 0.00 91.00 0.00 09Nov2017 6 a.m. -1.11 2.00 89.00 0.00 09Nov2017 7 a.m. -0.56 1.00 88.00 6.00 Accuml. Values 69.44 75.00 1727.00 2744.00 Num. Valid Values 21 20 23 23 Avg. Values 3.31 3.75 75.09 119.30 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -15.94 144.81 75.09 246.19 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2491 definition: xcompl = 1 - (RELH_avg/100) TdC = -19.3234 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 = 0.1834 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.8166 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.9031 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 = 0.4422 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.4096 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.020 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.