Detailed Weather Data for Project: HEYB

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 36.36 11.10 45.33 0.20 05Dec2017 9 a.m. 36.32 8.60 42.77 14.30 05Dec2017 10 a.m. 36.99 8.90 44.42 27.10 05Dec2017 11 a.m. 37.58 9.30 41.63 99.20 05Dec2017 12 p.m. 38.97 8.60 37.05 268.70 05Dec2017 1 p.m. 41.22 8.10 32.59 410.00 05Dec2017 2 p.m. 43.63 6.20 30.06 302.00 05Dec2017 3 p.m. 45.27 6.00 26.47 201.60 05Dec2017 4 p.m. 46.36 5.00 26.24 99.90 05Dec2017 5 p.m. 45.59 4.60 27.39 28.10 05Dec2017 6 p.m. 43.02 3.10 29.76 0.00 05Dec2017 7 p.m. 48.42 7.80 42.49 0.00 05Dec2017 8 p.m. 36.91 0.50 51.53 0.00 05Dec2017 9 p.m. 34.16 0.70 61.57 0.00 05Dec2017 10 p.m. 32.56 0.60 59.51 0.00 05Dec2017 11 p.m. 30.15 1.00 61.52 0.00 06Dec2017 12 a.m. 32.14 1.10 61.93 0.00 06Dec2017 1 a.m. 32.86 1.60 56.17 0.00 06Dec2017 2 a.m. 32.45 0.70 54.70 0.00 06Dec2017 3 a.m. 32.14 1.50 64.38 0.00 06Dec2017 4 a.m. 33.12 1.20 58.79 0.00 06Dec2017 5 a.m. 33.30 0.60 55.97 0.00 06Dec2017 6 a.m. 31.23 0.60 65.49 0.00 06Dec2017 7 a.m. 29.98 0.80 66.36 0.00 Accuml. Values 890.71 98.20 1144.12 1451.10 Num. Valid Values 24 24 24 24 Avg. Values 37.11 4.09 47.67 60.46 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 2.84 158.00 47.67 124.77 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5233 definition: xcompl = 1 - (RELH_avg/100) TdC = -7.2374 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 = 0.4474 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5526 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.1201 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 = 3.9630 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.9502 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.066 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.