Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 25.61 7.21 58.25 98.75 07Mar2018 9 a.m. 33.32 6.71 42.33 208.00 07Mar2018 10 a.m. 39.78 6.15 32.75 378.50 07Mar2018 11 a.m. 44.42 6.71 26.33 667.67 07Mar2018 12 p.m. 48.33 5.14 22.50 788.75 07Mar2018 1 p.m. 51.32 3.36 19.67 874.00 07Mar2018 2 p.m. 54.14 4.19 18.25 821.25 07Mar2018 3 p.m. 56.21 4.03 16.50 753.25 07Mar2018 4 p.m. 57.02 5.03 16.00 540.00 07Mar2018 5 p.m. 57.74 5.03 15.75 415.00 07Mar2018 6 p.m. 55.04 6.04 16.00 81.00 07Mar2018 7 p.m. 47.66 7.38 23.00 0.00 07Mar2018 8 p.m. 42.26 6.82 31.00 0.00 07Mar2018 9 p.m. 38.54 6.04 37.67 0.00 07Mar2018 10 p.m. 37.16 3.58 40.67 0.00 07Mar2018 11 p.m. 35.01 3.13 47.50 0.00 08Mar2018 12 a.m. 36.72 2.46 46.00 0.00 08Mar2018 1 a.m. 37.62 2.18 45.25 0.00 08Mar2018 2 a.m. 34.02 1.29 53.75 0.00 08Mar2018 3 a.m. 29.12 2.24 68.00 0.00 08Mar2018 4 a.m. 28.31 3.30 73.00 0.00 08Mar2018 5 a.m. 27.95 3.69 73.00 0.00 08Mar2018 6 a.m. 29.03 6.88 68.00 0.00 08Mar2018 7 a.m. 28.85 5.70 71.50 2.50 Accuml. Values 975.18 114.29 962.67 5628.67 Num. Valid Values 24 24 24 24 Avg. Values 40.63 4.76 40.11 234.53 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.80 183.89 40.11 483.95 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5989 definition: xcompl = 1 - (RELH_avg/100) TdC = -7.7513 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 = 0.4774 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5226 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.2216 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 = 5.2130 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.0762 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.163 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.