Detailed Weather Data for Project: PENS

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 57.09 1.05 76.08 8.11 03Dec2017 9 a.m. 58.51 0.50 74.03 63.41 03Dec2017 10 a.m. 60.96 0.76 70.77 139.69 03Dec2017 11 a.m. 66.04 3.59 62.84 374.26 03Dec2017 12 p.m. 68.38 3.32 59.01 351.76 03Dec2017 1 p.m. 69.30 4.12 57.21 292.01 03Dec2017 2 p.m. 70.72 4.16 54.59 362.19 03Dec2017 3 p.m. 71.53 4.13 54.47 272.16 03Dec2017 4 p.m. 73.42 4.19 52.38 205.55 03Dec2017 5 p.m. 71.06 4.08 58.15 38.54 03Dec2017 6 p.m. 68.25 3.10 64.31 0.00 03Dec2017 7 p.m. 63.37 9.68 38.28 0.00 03Dec2017 8 p.m. 67.01 4.09 63.84 0.00 03Dec2017 9 p.m. 66.63 4.02 62.36 0.00 03Dec2017 10 p.m. 66.09 3.77 62.89 0.00 03Dec2017 11 p.m. 66.20 4.18 62.20 0.00 04Dec2017 12 a.m. 66.24 4.41 61.72 0.00 04Dec2017 1 a.m. 65.61 4.49 62.54 0.00 04Dec2017 2 a.m. 65.03 4.13 62.47 0.00 04Dec2017 3 a.m. 64.92 4.55 63.23 0.00 04Dec2017 4 a.m. 64.17 4.12 67.02 0.00 04Dec2017 5 a.m. 63.72 4.88 70.56 0.00 04Dec2017 6 a.m. 63.50 5.41 76.04 0.00 04Dec2017 7 a.m. 62.80 4.29 83.28 0.00 Accuml. Values 1580.54 95.02 1520.27 2107.68 Num. Valid Values 24 24 24 24 Avg. Values 65.86 3.96 63.34 87.82 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 18.81 152.89 63.34 181.22 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3666 definition: xcompl = 1 - (RELH_avg/100) TdC = 11.7918 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 = 0.6727 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3273 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.1927 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 = 7.8756 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.3080 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.100 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.