Detailed Weather Data for Project: PATM

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 63.00 9.98 99.49 6.00 04Dec2017 9 a.m. 63.00 12.88 99.54 111.00 04Dec2017 10 a.m. 65.19 11.98 99.17 112.00 04Dec2017 11 a.m. 66.07 12.19 99.18 132.00 04Dec2017 12 p.m. 68.94 16.48 97.22 257.00 04Dec2017 1 p.m. 72.12 15.06 84.33 146.00 04Dec2017 2 p.m. 73.33 15.96 79.81 116.00 04Dec2017 3 p.m. 74.86 16.64 74.44 251.00 04Dec2017 4 p.m. 75.63 17.74 72.67 225.00 04Dec2017 5 p.m. 73.33 11.74 78.41 27.00 04Dec2017 6 p.m. 72.12 14.39 84.82 -2.00 04Dec2017 7 p.m. 41.58 1.22 41.71 -3.00 04Dec2017 8 p.m. 70.70 4.37 65.96 -3.00 04Dec2017 9 p.m. 60.24 9.14 99.60 -2.00 04Dec2017 10 p.m. 57.06 8.53 98.86 -2.00 04Dec2017 11 p.m. 54.75 4.49 99.29 -2.00 05Dec2017 12 a.m. 54.54 5.09 98.80 -2.00 05Dec2017 1 a.m. 53.33 9.74 69.56 -2.00 05Dec2017 2 a.m. 52.56 10.59 51.48 -3.00 05Dec2017 3 a.m. 50.58 13.54 44.09 -3.00 05Dec2017 4 a.m. 49.24 12.31 46.47 -3.00 05Dec2017 5 a.m. 48.15 9.90 45.37 -3.00 05Dec2017 6 a.m. 46.63 9.73 46.66 -3.00 05Dec2017 7 a.m. 45.64 10.24 45.99 -2.00 Accuml. Values 1452.58 263.93 1822.92 1348.00 Num. Valid Values 24 24 24 24 Avg. Values 60.52 11.00 75.96 56.17 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.85 424.66 75.96 115.90 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2404 definition: xcompl = 1 - (RELH_avg/100) TdC = 11.6663 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 = 0.6357 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3643 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.2950 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 = 4.2849 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.9428 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.093 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.