Detailed Weather Data for Project: HEYB

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 39.56 5.70 44.86 91.50 06Mar2018 9 a.m. 45.46 12.00 37.40 302.70 06Mar2018 10 a.m. 50.02 18.40 31.74 491.60 06Mar2018 11 a.m. 52.25 21.90 28.95 645.10 06Mar2018 12 p.m. 53.82 24.20 27.18 744.60 06Mar2018 1 p.m. 55.38 25.20 24.92 773.10 06Mar2018 2 p.m. 56.43 27.40 22.12 730.50 06Mar2018 3 p.m. 56.43 27.20 22.45 374.40 06Mar2018 4 p.m. 55.96 27.90 21.21 391.90 06Mar2018 5 p.m. 55.33 25.30 21.32 257.30 06Mar2018 6 p.m. 53.15 23.50 25.34 86.80 06Mar2018 7 p.m. 51.22 6.80 30.69 0.70 06Mar2018 8 p.m. 46.51 20.20 38.06 0.00 06Mar2018 9 p.m. 43.39 17.30 44.61 0.00 06Mar2018 10 p.m. 41.54 11.30 46.98 0.00 06Mar2018 11 p.m. 40.35 14.40 49.36 0.00 07Mar2018 12 a.m. 38.86 9.90 52.64 0.00 07Mar2018 1 a.m. 36.99 7.60 55.01 0.00 07Mar2018 2 a.m. 36.27 9.80 58.17 0.00 07Mar2018 3 a.m. 36.01 11.10 60.45 0.00 07Mar2018 4 a.m. 34.59 9.20 62.74 0.00 07Mar2018 5 a.m. 33.58 8.20 65.48 0.00 07Mar2018 6 a.m. 32.02 6.50 68.23 0.00 07Mar2018 7 a.m. 30.79 6.60 72.15 0.80 Accuml. Values 1075.91 377.60 1012.06 4891.00 Num. Valid Values 24 24 24 24 Avg. Values 44.83 15.73 42.17 203.79 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 7.13 607.56 42.17 420.53 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5783 definition: xcompl = 1 - (RELH_avg/100) TdC = -4.9712 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 = 0.5128 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4872 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.5842 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 = 5.9062 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 10.4134 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.272 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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