Detailed Weather Data for Project: KEYS

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. 42.44 3.44 84.76 24.00 02Dec2017 9 a.m. 47.71 3.78 76.33 202.00 02Dec2017 10 a.m. 54.09 4.68 58.81 366.00 02Dec2017 11 a.m. 60.24 3.21 55.51 477.00 02Dec2017 12 p.m. 63.64 2.84 52.15 532.00 02Dec2017 1 p.m. 61.90 1.06 57.65 420.00 02Dec2017 2 p.m. 64.98 2.03 54.84 58.00 02Dec2017 3 p.m. 67.71 3.97 49.16 128.00 02Dec2017 4 p.m. 67.71 5.25 50.01 167.00 02Dec2017 5 p.m. 66.51 4.59 51.66 64.00 02Dec2017 6 p.m. 62.10 4.17 59.04 2.00 02Dec2017 7 p.m. 67.28 7.71 69.74 0.00 02Dec2017 8 p.m. 53.20 4.29 80.00 0.00 02Dec2017 9 p.m. 52.86 2.51 80.72 0.00 02Dec2017 10 p.m. 52.32 2.85 81.58 0.00 02Dec2017 11 p.m. 48.38 3.41 90.19 0.00 03Dec2017 12 a.m. 47.39 4.05 94.22 0.00 03Dec2017 1 a.m. 46.49 3.90 95.19 0.00 03Dec2017 2 a.m. 46.94 4.18 94.22 0.00 03Dec2017 3 a.m. 46.62 4.91 96.42 0.00 03Dec2017 4 a.m. 49.37 5.91 88.30 0.00 03Dec2017 5 a.m. 48.27 5.41 92.33 0.00 03Dec2017 6 a.m. 49.14 5.24 94.65 0.00 03Dec2017 7 a.m. 48.38 5.83 94.47 0.00 Accuml. Values 1315.67 99.22 1801.95 2440.00 Num. Valid Values 24 24 24 24 Avg. Values 54.82 4.13 75.08 101.67 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 12.68 159.64 75.08 209.79 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2492 definition: xcompl = 1 - (RELH_avg/100) TdC = 8.4232 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 = 0.5932 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4068 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.3055 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 = 3.6260 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.7431 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.074 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.