Detailed Weather Data for Project: KEYS

Date Time TAIR WSPD RELH SRAD 11Jul2018 8 a.m. 79.66 2.73 89.07 198.00 11Jul2018 9 a.m. 83.84 1.45 78.21 383.00 11Jul2018 10 a.m. 88.70 2.06 61.42 568.00 11Jul2018 11 a.m. 91.00 2.43 51.29 732.00 11Jul2018 12 p.m. 91.33 2.62 47.81 803.00 11Jul2018 1 p.m. 92.30 4.89 49.63 884.00 11Jul2018 2 p.m. 92.64 5.39 49.33 811.00 11Jul2018 3 p.m. 94.08 5.41 46.65 902.00 11Jul2018 4 p.m. 95.72 5.99 41.70 744.00 11Jul2018 5 p.m. 94.96 4.68 42.19 490.00 11Jul2018 6 p.m. 94.73 7.18 42.98 423.00 11Jul2018 7 p.m. 93.63 5.64 47.31 322.00 11Jul2018 8 p.m. 92.75 6.99 39.07 129.00 11Jul2018 9 p.m. 88.25 4.81 45.42 16.00 11Jul2018 10 p.m. 85.50 2.03 70.15 0.00 11Jul2018 11 p.m. 84.07 1.59 76.07 0.00 12Jul2018 12 a.m. 81.75 0.48 82.30 0.00 12Jul2018 1 a.m. 80.10 1.76 90.40 0.00 12Jul2018 2 a.m. 78.91 2.37 92.43 0.00 12Jul2018 3 a.m. 78.03 2.08 94.08 0.00 12Jul2018 4 a.m. 77.58 2.13 94.93 0.00 12Jul2018 5 a.m. 76.37 2.69 96.64 0.00 12Jul2018 6 a.m. 76.15 3.59 100.31 0.00 12Jul2018 7 a.m. 77.47 2.26 96.34 20.00 Accuml. Values 2069.53 83.25 1625.73 7425.00 Num. Valid Values 24 24 24 24 Avg. Values 86.23 3.47 67.74 309.38 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 30.13 133.95 67.74 638.40 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3226 definition: xcompl = 1 - (RELH_avg/100) TdC = 23.6569 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 = 0.7880 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.2120 definition: del_lambda2 = 1 - del_lambda1 Qn = 9.2961 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 = 13.5111 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.9921 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.355 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.