Detailed Weather Data for Project: SARD

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 53.91 24.30 53.49 74.60 04Mar2018 9 a.m. 54.54 26.60 54.26 174.40 04Mar2018 10 a.m. 55.11 23.20 54.80 147.00 04Mar2018 11 a.m. 54.77 22.20 58.57 81.90 04Mar2018 12 p.m. 51.76 18.10 79.53 99.70 04Mar2018 1 p.m. 51.98 15.30 79.91 67.30 04Mar2018 2 p.m. 52.56 15.60 77.66 58.80 04Mar2018 3 p.m. 52.84 15.00 80.41 118.40 04Mar2018 4 p.m. 54.70 20.30 74.62 195.10 04Mar2018 5 p.m. 54.86 16.40 71.38 66.20 04Mar2018 6 p.m. 54.41 16.50 70.63 3.60 04Mar2018 7 p.m. 56.98 19.20 31.64 0.40 04Mar2018 8 p.m. 54.25 9.70 69.93 0.00 04Mar2018 9 p.m. 53.51 13.80 74.68 0.00 04Mar2018 10 p.m. 53.46 20.10 74.80 0.00 04Mar2018 11 p.m. 54.75 21.00 69.79 0.00 05Mar2018 12 a.m. 55.51 27.70 67.70 0.00 05Mar2018 1 a.m. 55.80 25.90 68.10 0.00 05Mar2018 2 a.m. 56.08 26.90 69.80 0.00 05Mar2018 3 a.m. 56.48 25.10 73.99 0.00 05Mar2018 4 a.m. 58.19 19.00 78.57 0.00 05Mar2018 5 a.m. 59.95 14.90 81.10 0.00 05Mar2018 6 a.m. 61.21 21.10 82.89 0.00 05Mar2018 7 a.m. 62.51 24.00 83.91 0.00 Accuml. Values 1330.12 481.90 1682.16 1087.40 Num. Valid Values 24 24 24 24 Avg. Values 55.42 20.08 70.09 45.31 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.01 775.38 70.09 93.49 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2991 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.7510 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 = 0.5978 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4022 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.0197 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 = 4.4453 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 9.9183 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.157 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.