Detailed Weather Data for Project: MARI

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 41.43 24.61 68.50 146.00 05Mar2018 9 a.m. 42.21 33.23 69.54 254.00 05Mar2018 10 a.m. 43.95 31.00 57.88 569.00 05Mar2018 11 a.m. 44.73 32.38 53.91 720.00 05Mar2018 12 p.m. 46.60 28.87 37.36 821.00 05Mar2018 1 p.m. 47.91 28.83 34.00 854.00 05Mar2018 2 p.m. 48.92 31.24 33.52 810.00 05Mar2018 3 p.m. 49.57 30.06 30.65 697.00 05Mar2018 4 p.m. 50.00 31.99 33.64 514.00 05Mar2018 5 p.m. 50.77 29.39 33.94 296.00 05Mar2018 6 p.m. 49.78 25.96 32.36 96.00 05Mar2018 7 p.m. 33.64 22.85 62.34 1.00 05Mar2018 8 p.m. 46.38 8.51 39.50 0.00 05Mar2018 9 p.m. 42.21 7.42 37.31 0.00 05Mar2018 10 p.m. 40.44 10.42 40.05 0.00 05Mar2018 11 p.m. 44.40 15.25 41.51 0.00 06Mar2018 12 a.m. 41.43 12.57 43.53 0.00 06Mar2018 1 a.m. 38.03 10.73 45.91 0.00 06Mar2018 2 a.m. 39.13 17.59 46.28 0.00 06Mar2018 3 a.m. 41.00 23.80 41.70 0.00 06Mar2018 4 a.m. 38.91 20.93 42.19 0.00 06Mar2018 5 a.m. 40.68 25.56 43.53 0.00 06Mar2018 6 a.m. 40.89 30.06 43.41 0.00 06Mar2018 7 a.m. 41.43 35.57 42.25 4.00 Accuml. Values 1044.44 568.82 1054.81 5782.00 Num. Valid Values 24 24 24 24 Avg. Values 43.52 23.70 43.95 240.92 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.40 915.23 43.95 497.14 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5605 definition: xcompl = 1 - (RELH_avg/100) TdC = -5.0718 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 = 0.5018 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4982 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.5149 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 = 5.4437 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 13.6558 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.357 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.