Detailed Weather Data for Project: MARI

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. 31.64 2.45 99.21 29.00 02Dec2017 9 a.m. 38.25 3.33 99.34 192.00 02Dec2017 10 a.m. 41.65 6.80 89.50 354.00 02Dec2017 11 a.m. 46.71 7.12 78.08 476.00 02Dec2017 12 p.m. 51.10 6.70 62.27 545.00 02Dec2017 1 p.m. 50.88 7.11 66.85 550.00 02Dec2017 2 p.m. 53.17 6.00 61.78 494.00 02Dec2017 3 p.m. 56.05 4.40 51.77 377.00 02Dec2017 4 p.m. 55.04 6.43 54.69 217.00 02Dec2017 5 p.m. 54.72 6.02 59.94 33.00 02Dec2017 6 p.m. 54.39 1.62 60.26 0.00 02Dec2017 7 p.m. 61.30 20.54 68.18 0.00 02Dec2017 8 p.m. 43.52 3.39 73.99 0.00 02Dec2017 9 p.m. 41.41 3.07 81.13 0.00 02Dec2017 10 p.m. 44.73 1.32 87.00 0.00 02Dec2017 11 p.m. 43.52 2.85 90.35 0.00 03Dec2017 12 a.m. 39.99 3.22 89.87 0.00 03Dec2017 1 a.m. 33.85 3.34 95.85 0.00 03Dec2017 2 a.m. 34.61 3.93 99.02 0.00 03Dec2017 3 a.m. 35.17 3.49 99.27 0.00 03Dec2017 4 a.m. 36.27 2.25 99.51 0.00 03Dec2017 5 a.m. 36.93 1.61 99.63 0.00 03Dec2017 6 a.m. 37.47 2.06 99.69 0.00 03Dec2017 7 a.m. 34.18 2.27 99.58 0.00 Accuml. Values 1056.54 111.32 1966.76 3267.00 Num. Valid Values 24 24 24 24 Avg. Values 44.02 4.64 81.95 136.13 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.68 179.11 81.95 280.90 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1805 definition: xcompl = 1 - (RELH_avg/100) TdC = 3.8180 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 = 0.5061 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4939 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.8807 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 = 1.7750 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.5565 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.068 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.