Detailed Weather Data for Project: KEYS

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 54.30 8.67 55.99 9.00 04Mar2018 9 a.m. 56.39 8.26 53.74 92.00 04Mar2018 10 a.m. 58.37 9.32 53.06 188.00 04Mar2018 11 a.m. 57.60 10.03 53.67 289.00 04Mar2018 12 p.m. 57.70 9.25 55.68 152.00 04Mar2018 1 p.m. 58.93 11.58 55.20 301.00 04Mar2018 2 p.m. 59.92 9.44 59.66 114.00 04Mar2018 3 p.m. 59.23 10.56 70.28 57.00 04Mar2018 4 p.m. 57.61 10.96 73.40 85.00 04Mar2018 5 p.m. 56.93 12.28 79.44 80.00 04Mar2018 6 p.m. 56.28 11.20 82.56 22.00 04Mar2018 7 p.m. 55.62 8.78 24.67 6.00 04Mar2018 8 p.m. 56.17 10.26 84.94 0.00 04Mar2018 9 p.m. 56.39 10.79 82.93 0.00 04Mar2018 10 p.m. 56.17 9.71 82.37 0.00 04Mar2018 11 p.m. 56.17 11.97 81.39 0.00 05Mar2018 12 a.m. 56.84 10.72 78.59 0.00 05Mar2018 1 a.m. 57.61 10.05 79.87 0.00 05Mar2018 2 a.m. 58.14 10.42 82.55 0.00 05Mar2018 3 a.m. 60.22 9.27 84.26 0.00 05Mar2018 4 a.m. 62.20 7.79 85.66 0.00 05Mar2018 5 a.m. 62.76 8.97 86.03 0.00 05Mar2018 6 a.m. 63.86 10.35 84.08 0.00 05Mar2018 7 a.m. 50.47 19.49 69.49 1.00 Accuml. Values 1385.90 250.12 1699.51 1396.00 Num. Valid Values 24 24 24 24 Avg. Values 57.75 10.42 70.81 58.17 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 14.30 402.44 70.81 120.03 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2919 definition: xcompl = 1 - (RELH_avg/100) TdC = 9.1436 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 = 0.6153 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3847 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.3065 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 = 4.7124 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.2095 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.101 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.