Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 36.59 10.18 36.00 5.75 05Dec2017 9 a.m. 37.22 10.51 34.50 45.00 05Dec2017 10 a.m. 38.21 9.67 32.25 90.50 05Dec2017 11 a.m. 39.65 8.39 31.00 187.50 05Dec2017 12 p.m. 41.22 9.95 28.75 234.50 05Dec2017 1 p.m. 41.78 9.84 28.00 251.33 05Dec2017 2 p.m. 43.43 6.71 25.75 270.50 05Dec2017 3 p.m. 44.64 5.31 24.25 238.25 05Dec2017 4 p.m. -901.00 -901.00 -901.00 -901.00 05Dec2017 5 p.m. -901.00 -901.00 -901.00 -901.00 05Dec2017 6 p.m. -901.00 -901.00 -901.00 -901.00 05Dec2017 7 p.m. -901.00 -901.00 -901.00 -901.00 05Dec2017 8 p.m. 28.94 0.67 58.00 0.00 05Dec2017 9 p.m. 30.38 1.12 54.00 0.00 05Dec2017 10 p.m. 27.23 1.79 67.00 0.00 05Dec2017 11 p.m. 30.16 1.62 64.00 0.00 06Dec2017 12 a.m. 31.91 1.17 64.25 0.00 06Dec2017 1 a.m. 31.78 1.40 67.00 0.00 06Dec2017 2 a.m. 31.60 2.07 73.00 0.00 06Dec2017 3 a.m. 30.20 1.12 74.67 0.00 06Dec2017 4 a.m. 27.82 4.25 73.00 0.00 06Dec2017 5 a.m. 24.89 2.91 75.00 0.00 06Dec2017 6 a.m. 25.30 3.24 76.25 0.00 06Dec2017 7 a.m. 22.91 3.58 78.00 0.00 Accuml. Values 665.86 95.50 1064.67 1323.33 Num. Valid Values 20 20 20 20 Avg. Values 33.29 4.78 53.23 66.17 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 0.72 184.39 53.23 136.54 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4677 definition: xcompl = 1 - (RELH_avg/100) TdC = -7.7327 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 = 0.4146 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5854 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.1950 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 = 3.0364 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.5372 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.062 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.