Detailed Weather Data for Project: MARI

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 27.05 8.67 98.91 2.00 29Dec2017 9 a.m. 28.02 8.97 96.96 23.00 29Dec2017 10 a.m. 29.89 15.32 95.56 48.00 29Dec2017 11 a.m. 31.66 16.05 91.71 56.00 29Dec2017 12 p.m. 32.97 15.05 87.86 90.00 29Dec2017 1 p.m. 34.95 13.48 82.49 145.00 29Dec2017 2 p.m. 35.73 13.75 79.99 155.00 29Dec2017 3 p.m. 36.37 11.34 77.60 183.00 29Dec2017 4 p.m. 36.16 8.07 76.68 105.00 29Dec2017 5 p.m. 35.60 3.92 78.45 24.00 29Dec2017 6 p.m. 33.73 1.18 82.48 1.00 29Dec2017 7 p.m. 9.12 10.19 58.98 0.00 29Dec2017 8 p.m. 30.78 14.75 90.11 0.00 29Dec2017 9 p.m. 25.61 20.04 98.97 0.00 29Dec2017 10 p.m. 22.64 24.58 99.10 1.00 29Dec2017 11 p.m. 19.35 25.17 97.14 1.00 30Dec2017 12 a.m. 17.58 21.33 92.93 0.00 30Dec2017 1 a.m. 16.50 20.94 85.31 0.00 30Dec2017 2 a.m. 14.20 26.19 85.25 0.00 30Dec2017 3 a.m. 12.97 21.20 86.10 0.00 30Dec2017 4 a.m. 12.09 22.66 85.85 0.00 30Dec2017 5 a.m. 10.35 20.77 84.45 0.00 30Dec2017 6 a.m. 8.80 17.78 82.93 0.00 30Dec2017 7 a.m. 8.26 15.88 79.20 0.00 Accuml. Values 570.38 377.28 2075.01 834.00 Num. Valid Values 24 24 24 24 Avg. Values 23.77 15.72 86.46 34.75 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -4.57 607.04 86.46 71.71 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1354 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.5115 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 = 0.3340 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6660 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.4423 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 = 0.6011 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.3933 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.031 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.