Detailed Weather Data for Project: ARBU

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 54.50 23.71 53.67 109.67 05Mar2018 9 a.m. 53.78 21.33 44.00 327.00 05Mar2018 10 a.m. 56.93 23.38 37.25 541.50 05Mar2018 11 a.m. 58.16 22.82 33.67 691.33 05Mar2018 12 p.m. 59.72 19.54 28.67 809.67 05Mar2018 1 p.m. 60.26 19.91 27.00 893.00 05Mar2018 2 p.m. 62.06 16.11 23.00 823.00 05Mar2018 3 p.m. 61.34 19.01 19.67 607.67 05Mar2018 4 p.m. -901.00 -901.00 -901.00 -901.00 05Mar2018 5 p.m. -901.00 -901.00 -901.00 -901.00 05Mar2018 6 p.m. -901.00 -901.00 -901.00 -901.00 05Mar2018 7 p.m. -901.00 -901.00 -901.00 -901.00 05Mar2018 8 p.m. -901.00 -901.00 -901.00 -901.00 05Mar2018 9 p.m. -901.00 -901.00 -901.00 -901.00 05Mar2018 10 p.m. -901.00 -901.00 -901.00 -901.00 05Mar2018 11 p.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 12 a.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 1 a.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 2 a.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 3 a.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 4 a.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 5 a.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 6 a.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 7 a.m. -901.00 -901.00 -901.00 -901.00 Accuml. Values 466.75 165.81 266.93 4802.84 Num. Valid Values 8 8 8 8 Avg. Values 58.34 20.73 33.37 600.35 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 14.64 800.36 33.37 1238.84 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6663 definition: xcompl = 1 - (RELH_avg/100) TdC = -1.4461 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 = 0.6197 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3803 definition: del_lambda2 = 1 - del_lambda1 Qn = 18.0306 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 = 11.1803 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 22.9380 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.783 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.