Detailed Weather Data for Project: FOSS

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 20.08 7.55 80.00 13.25 06Dec2017 9 a.m. 26.42 5.74 71.33 148.67 06Dec2017 10 a.m. 37.13 9.84 47.75 305.50 06Dec2017 11 a.m. 44.30 10.22 37.67 425.33 06Dec2017 12 p.m. 50.22 12.75 29.75 509.25 06Dec2017 1 p.m. 51.74 13.57 25.67 532.67 06Dec2017 2 p.m. 54.14 15.21 19.50 496.75 06Dec2017 3 p.m. 54.00 15.99 17.75 406.75 06Dec2017 4 p.m. 52.34 16.83 20.00 273.00 06Dec2017 5 p.m. 49.37 12.97 22.00 115.75 06Dec2017 6 p.m. 41.18 6.71 30.00 0.00 06Dec2017 7 p.m. 36.50 4.70 37.00 0.00 06Dec2017 8 p.m. 35.15 5.59 38.00 0.00 06Dec2017 9 p.m. 31.88 4.47 43.67 0.00 06Dec2017 10 p.m. 30.07 4.36 47.50 0.00 06Dec2017 11 p.m. 29.03 5.26 50.00 0.00 07Dec2017 12 a.m. 27.55 5.59 53.25 0.00 07Dec2017 1 a.m. 28.54 10.40 54.75 0.00 07Dec2017 2 a.m. 29.66 8.89 60.75 0.00 07Dec2017 3 a.m. 28.34 12.30 70.67 0.00 07Dec2017 4 a.m. 27.50 12.81 77.25 0.00 07Dec2017 5 a.m. 25.79 11.63 78.50 0.00 07Dec2017 6 a.m. 23.50 11.35 79.50 0.00 07Dec2017 7 a.m. 21.83 12.64 72.00 0.00 Accuml. Values 856.26 237.37 1164.26 3226.92 Num. Valid Values 24 24 24 24 Avg. Values 35.68 9.89 48.51 134.46 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 2.04 381.93 48.51 277.45 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5149 definition: xcompl = 1 - (RELH_avg/100) TdC = -7.7397 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 = 0.4351 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5649 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.6491 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 = 3.6840 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.8125 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.135 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.