Detailed Weather Data for Project: PATM

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 45.64 6.41 99.06 154.00 03Mar2018 9 a.m. 49.24 8.43 84.51 327.00 03Mar2018 10 a.m. 52.99 8.76 69.19 562.00 03Mar2018 11 a.m. 56.52 9.02 53.44 710.00 03Mar2018 12 p.m. 59.92 8.62 43.05 796.00 03Mar2018 1 p.m. 62.78 8.14 35.85 810.00 03Mar2018 2 p.m. 64.20 11.62 36.33 767.00 03Mar2018 3 p.m. 65.19 10.70 35.54 667.00 03Mar2018 4 p.m. 67.28 9.12 31.63 494.00 03Mar2018 5 p.m. 67.28 8.94 33.04 289.00 03Mar2018 6 p.m. 65.52 7.12 33.95 60.00 03Mar2018 7 p.m. 55.29 11.10 96.85 -2.00 03Mar2018 8 p.m. 60.35 6.17 43.05 -2.00 03Mar2018 9 p.m. 59.14 5.63 41.40 -3.00 03Mar2018 10 p.m. 59.58 6.94 40.12 -3.00 03Mar2018 11 p.m. 59.25 7.02 42.07 -3.00 04Mar2018 12 a.m. 59.58 5.72 38.47 -3.00 04Mar2018 1 a.m. 58.93 5.91 41.46 -3.00 04Mar2018 2 a.m. 58.26 8.28 41.10 -3.00 04Mar2018 3 a.m. 57.40 8.25 44.40 -3.00 04Mar2018 4 a.m. 57.16 6.89 44.39 -2.00 04Mar2018 5 a.m. 56.39 7.05 50.81 -3.00 04Mar2018 6 a.m. 55.40 6.82 54.16 -2.00 04Mar2018 7 a.m. 54.54 5.82 58.44 -2.00 Accuml. Values 1407.83 188.48 1192.31 5602.00 Num. Valid Values 24 24 24 24 Avg. Values 58.66 7.85 49.68 233.42 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 14.81 303.26 49.68 481.66 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5032 definition: xcompl = 1 - (RELH_avg/100) TdC = 4.3894 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 = 0.6221 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3779 definition: del_lambda2 = 1 - del_lambda1 Qn = 5.0138 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 = 8.4956 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.5400 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.250 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.