Detailed Weather Data for Project: FCOB

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 56.48 16.78 97.00 8.00 04Mar2018 9 a.m. 56.96 18.04 98.00 35.33 04Mar2018 10 a.m. 57.65 18.01 97.75 65.75 04Mar2018 11 a.m. 57.80 20.13 98.00 79.33 04Mar2018 12 p.m. 58.01 18.90 98.75 89.00 04Mar2018 1 p.m. 58.88 16.18 98.67 56.67 04Mar2018 2 p.m. 60.80 15.99 96.75 77.25 04Mar2018 3 p.m. 62.24 19.07 94.25 70.75 04Mar2018 4 p.m. 62.37 20.97 94.00 83.50 04Mar2018 5 p.m. 62.51 18.34 92.75 34.75 04Mar2018 6 p.m. 64.04 21.03 90.00 83.00 04Mar2018 7 p.m. 62.78 18.57 92.00 0.00 04Mar2018 8 p.m. 63.50 19.91 91.00 0.00 04Mar2018 9 p.m. 63.32 22.15 93.00 0.00 04Mar2018 10 p.m. 63.14 21.14 94.00 0.00 04Mar2018 11 p.m. 62.60 20.19 95.50 0.00 05Mar2018 12 a.m. 62.96 23.54 94.50 0.00 05Mar2018 1 a.m. 63.23 24.16 92.25 0.00 05Mar2018 2 a.m. 61.92 20.47 93.25 0.00 05Mar2018 3 a.m. 60.86 15.66 91.67 0.00 05Mar2018 4 a.m. 59.90 15.43 82.50 0.00 05Mar2018 5 a.m. 56.93 20.58 57.50 0.00 05Mar2018 6 a.m. 50.63 15.71 49.00 0.00 05Mar2018 7 a.m. 47.84 11.97 50.50 2.50 Accuml. Values 1437.35 452.92 2132.59 685.83 Num. Valid Values 24 24 24 24 Avg. Values 59.89 18.87 88.86 28.58 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.49 728.75 88.86 58.97 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1114 definition: xcompl = 1 - (RELH_avg/100) TdC = 13.6517 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 = 0.6311 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3689 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.3679 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 = 1.9748 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.6107 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.058 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.