Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 11.75 6.65 68.75 2.50 02Jan2018 9 a.m. 12.68 4.92 65.00 45.00 02Jan2018 10 a.m. 16.12 4.08 55.25 170.00 02Jan2018 11 a.m. 19.58 5.37 49.00 310.67 02Jan2018 12 p.m. 23.00 4.92 41.75 494.00 02Jan2018 1 p.m. -901.00 3.80 39.33 322.33 02Jan2018 2 p.m. -901.00 5.20 38.00 334.50 02Jan2018 3 p.m. -901.00 4.14 34.75 496.25 02Jan2018 4 p.m. -901.00 3.97 33.00 314.50 02Jan2018 5 p.m. -901.00 2.07 33.50 167.25 02Jan2018 6 p.m. -901.00 5.59 46.00 0.00 02Jan2018 7 p.m. -901.00 5.59 53.00 0.00 02Jan2018 8 p.m. -901.00 4.70 57.00 0.00 02Jan2018 9 p.m. -901.00 4.25 59.00 0.00 02Jan2018 10 p.m. -901.00 3.21 61.33 0.00 02Jan2018 11 p.m. -901.00 4.08 63.75 0.00 03Jan2018 12 a.m. -901.00 3.08 66.50 0.00 03Jan2018 1 a.m. -901.00 3.75 71.50 0.00 03Jan2018 2 a.m. -901.00 2.52 74.75 0.00 03Jan2018 3 a.m. -901.00 0.89 76.00 0.00 03Jan2018 4 a.m. -901.00 2.29 76.75 0.00 03Jan2018 5 a.m. -901.00 1.01 79.00 0.00 03Jan2018 6 a.m. -901.00 3.19 77.00 0.00 03Jan2018 7 a.m. -901.00 4.92 71.00 0.00 Accuml. Values 83.13 94.19 1390.91 2657.00 Num. Valid Values 5 24 24 24 Avg. Values 16.63 3.92 57.95 110.71 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -8.54 151.55 57.95 228.45 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4205 definition: xcompl = 1 - (RELH_avg/100) TdC = -15.3294 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 = 0.2769 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7231 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.8630 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 = 1.3610 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.1273 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.042 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.