Detailed Weather Data for Project: MARI

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 50.77 16.15 63.80 47.00 04Mar2018 9 a.m. 55.71 17.94 58.36 148.00 04Mar2018 10 a.m. 59.79 20.97 58.00 232.00 04Mar2018 11 a.m. 63.63 22.90 56.23 586.00 04Mar2018 12 p.m. 66.15 22.11 52.93 477.00 04Mar2018 1 p.m. 67.37 23.66 55.80 680.00 04Mar2018 2 p.m. 68.47 22.66 55.07 537.00 04Mar2018 3 p.m. 67.35 25.06 58.42 392.00 04Mar2018 4 p.m. 65.61 21.37 62.64 88.00 04Mar2018 5 p.m. 62.62 24.35 68.37 48.00 04Mar2018 6 p.m. 60.66 20.22 63.80 21.00 04Mar2018 7 p.m. 47.80 10.53 38.46 1.00 04Mar2018 8 p.m. 56.16 19.46 81.32 0.00 04Mar2018 9 p.m. 54.18 18.84 89.19 0.00 04Mar2018 10 p.m. 55.49 17.32 92.78 0.00 04Mar2018 11 p.m. 54.50 17.52 99.88 0.00 05Mar2018 12 a.m. 53.74 17.96 100.31 1.00 05Mar2018 1 a.m. 53.85 18.47 100.49 2.00 05Mar2018 2 a.m. 55.27 16.22 100.61 2.00 05Mar2018 3 a.m. 57.79 13.65 100.12 1.00 05Mar2018 4 a.m. 52.86 10.20 83.76 1.00 05Mar2018 5 a.m. 42.85 35.30 85.53 1.00 05Mar2018 6 a.m. 42.10 33.34 81.27 0.00 05Mar2018 7 a.m. 41.67 29.75 71.56 3.00 Accuml. Values 1356.38 495.95 1778.70 3268.00 Num. Valid Values 24 24 24 24 Avg. Values 56.52 20.66 74.11 136.17 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.62 797.98 74.11 280.98 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2589 definition: xcompl = 1 - (RELH_avg/100) TdC = 9.1481 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 = 0.6061 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3939 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.2216 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 = 4.0016 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 9.2639 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.197 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.