Detailed Weather Data for Project: WIST

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 25.93 0.43 72.28 3.00 29Dec2017 9 a.m. 28.35 0.37 66.61 38.00 29Dec2017 10 a.m. 32.76 0.33 59.04 127.00 29Dec2017 11 a.m. 36.72 0.38 54.71 180.00 29Dec2017 12 p.m. 44.85 1.26 31.99 251.00 29Dec2017 1 p.m. 44.62 2.47 36.21 271.00 29Dec2017 2 p.m. 45.27 3.30 36.14 227.00 29Dec2017 3 p.m. 44.08 2.09 46.59 139.00 29Dec2017 4 p.m. 43.07 3.92 52.63 67.00 29Dec2017 5 p.m. 42.21 1.60 53.36 34.00 29Dec2017 6 p.m. 41.32 0.84 60.13 4.00 29Dec2017 7 p.m. 30.43 5.32 68.68 0.00 29Dec2017 8 p.m. 41.54 1.35 63.13 0.00 29Dec2017 9 p.m. 40.98 1.62 58.55 0.00 29Dec2017 10 p.m. 40.57 0.23 63.87 0.00 29Dec2017 11 p.m. 40.57 0.27 66.25 0.00 30Dec2017 12 a.m. 40.33 0.35 67.03 0.00 30Dec2017 1 a.m. 39.56 0.13 68.74 0.00 30Dec2017 2 a.m. 39.24 0.41 71.00 0.00 30Dec2017 3 a.m. 38.80 0.41 69.36 0.00 30Dec2017 4 a.m. 38.68 0.36 67.77 0.00 30Dec2017 5 a.m. 38.80 0.28 69.48 0.00 30Dec2017 6 a.m. 39.00 0.36 66.97 0.00 30Dec2017 7 a.m. 39.00 0.37 68.25 0.00 Accuml. Values 936.68 28.45 1438.77 1341.00 Num. Valid Values 24 24 24 24 Avg. Values 39.03 1.19 59.95 55.88 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.90 45.78 59.95 115.30 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4005 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.1383 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 = 0.4638 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5362 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.0468 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 = 3.2449 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.5574 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.034 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.