Detailed Weather Data for Project: TORO

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. -2.18 3.50 69.05 6.40 01Jan2018 9 a.m. -1.19 2.50 63.47 154.30 01Jan2018 10 a.m. 1.56 2.00 55.96 329.50 01Jan2018 11 a.m. 5.20 1.80 49.61 462.70 01Jan2018 12 p.m. 8.20 1.00 45.21 539.70 01Jan2018 1 p.m. 11.64 0.60 40.60 552.00 01Jan2018 2 p.m. 13.78 0.40 37.52 479.80 01Jan2018 3 p.m. 13.57 0.70 37.83 184.30 01Jan2018 4 p.m. 14.79 0.60 35.26 192.40 01Jan2018 5 p.m. 15.22 1.20 33.87 56.00 01Jan2018 6 p.m. 12.92 2.50 36.11 0.00 01Jan2018 7 p.m. 16.97 3.10 42.44 0.00 01Jan2018 8 p.m. 11.16 4.90 41.69 0.00 01Jan2018 9 p.m. 10.54 4.40 42.19 0.00 01Jan2018 10 p.m. 10.20 1.90 44.26 0.00 01Jan2018 11 p.m. 9.75 3.50 45.71 0.00 02Jan2018 12 a.m. 9.27 2.50 44.24 0.00 02Jan2018 1 a.m. 8.69 1.00 45.98 0.00 02Jan2018 2 a.m. 8.29 1.00 47.83 0.00 02Jan2018 3 a.m. 7.45 0.80 53.14 0.00 02Jan2018 4 a.m. 6.87 0.60 54.04 0.00 02Jan2018 5 a.m. 6.28 0.70 55.03 0.00 02Jan2018 6 a.m. 6.17 0.90 55.65 0.00 02Jan2018 7 a.m. 5.76 0.30 53.45 0.00 Accuml. Values 210.92 42.40 1130.14 2957.10 Num. Valid Values 24 24 24 24 Avg. Values 8.79 1.77 47.09 123.21 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -12.90 68.22 47.09 254.25 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5291 definition: xcompl = 1 - (RELH_avg/100) TdC = -21.8908 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 = 0.2194 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7806 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.0138 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 = 1.2146 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.7331 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.031 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.