Detailed Weather Data for Project: PATM

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 40.39 1.60 31.66 83.50 06Mar2018 9 a.m. 45.19 5.50 23.31 302.00 06Mar2018 10 a.m. 50.65 8.40 17.72 541.20 06Mar2018 11 a.m. 56.26 11.20 10.15 712.00 06Mar2018 12 p.m. 58.14 13.80 7.07 825.30 06Mar2018 1 p.m. 59.23 13.40 6.50 869.30 06Mar2018 2 p.m. 60.73 14.40 5.43 840.70 06Mar2018 3 p.m. 62.04 17.10 4.68 741.60 06Mar2018 4 p.m. 62.31 16.80 4.82 580.00 06Mar2018 5 p.m. 61.63 17.50 4.69 367.80 06Mar2018 6 p.m. 60.19 17.00 4.94 120.80 06Mar2018 7 p.m. 49.71 2.80 16.77 2.50 06Mar2018 8 p.m. 55.87 12.20 6.60 0.00 06Mar2018 9 p.m. 54.07 12.70 8.46 0.00 06Mar2018 10 p.m. 52.18 15.00 8.63 0.00 06Mar2018 11 p.m. 48.60 16.20 12.33 0.00 07Mar2018 12 a.m. 45.86 14.70 14.39 0.00 07Mar2018 1 a.m. 42.85 10.60 19.37 0.00 07Mar2018 2 a.m. 39.99 8.30 21.67 0.00 07Mar2018 3 a.m. 38.89 10.60 23.88 0.00 07Mar2018 4 a.m. 36.93 6.80 30.20 0.00 07Mar2018 5 a.m. 35.46 5.60 32.16 0.00 07Mar2018 6 a.m. 34.30 6.20 36.54 0.00 07Mar2018 7 a.m. 33.17 6.10 39.08 0.00 Accuml. Values 1184.65 264.50 391.05 5986.70 Num. Valid Values 24 24 24 24 Avg. Values 49.36 11.02 16.29 249.45 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 9.64 425.58 16.29 514.74 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.8371 definition: xcompl = 1 - (RELH_avg/100) TdC = -14.7937 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 = 0.5501 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4499 definition: del_lambda2 = 1 - del_lambda1 Qn = 5.0212 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 = 10.0904 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 12.6481 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.333 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.