Detailed Weather Data for Project: KAWL

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 37.80 10.90 37.86 105.60 06Mar2018 9 a.m. 41.94 14.60 34.75 329.10 06Mar2018 10 a.m. 45.90 20.40 29.84 531.90 06Mar2018 11 a.m. 48.60 26.20 27.24 690.80 06Mar2018 12 p.m. 50.95 32.00 22.71 790.90 06Mar2018 1 p.m. 51.98 34.90 20.25 788.70 06Mar2018 2 p.m. 52.14 33.10 19.63 723.20 06Mar2018 3 p.m. 52.32 34.00 18.62 610.40 06Mar2018 4 p.m. 51.49 34.90 21.26 469.40 06Mar2018 5 p.m. 49.33 33.80 27.00 291.80 06Mar2018 6 p.m. 46.38 30.80 32.55 85.70 06Mar2018 7 p.m. 49.51 5.00 26.24 2.50 06Mar2018 8 p.m. 40.01 21.20 44.06 0.00 06Mar2018 9 p.m. 38.23 14.50 47.54 0.00 06Mar2018 10 p.m. 37.08 13.60 51.77 0.00 06Mar2018 11 p.m. 35.17 9.40 54.11 0.00 07Mar2018 12 a.m. 33.80 8.10 57.80 0.00 07Mar2018 1 a.m. 32.94 9.10 60.91 0.00 07Mar2018 2 a.m. 32.02 9.20 63.66 0.00 07Mar2018 3 a.m. 30.88 11.20 66.65 0.00 07Mar2018 4 a.m. 30.07 11.10 68.27 0.00 07Mar2018 5 a.m. 28.98 10.80 70.99 0.00 07Mar2018 6 a.m. 28.18 10.00 74.18 0.00 07Mar2018 7 a.m. 26.83 10.90 76.86 0.10 Accuml. Values 972.53 449.70 1054.75 5420.10 Num. Valid Values 24 24 24 24 Avg. Values 40.52 18.74 43.95 225.84 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.73 723.57 43.95 466.02 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5605 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.5911 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 = 0.4765 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5235 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.9902 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 = 4.8539 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 10.1128 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.283 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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