Detailed Weather Data for Project: HEYB

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 30.97 7.70 72.66 106.30 07Mar2018 9 a.m. 33.03 10.50 67.31 290.50 07Mar2018 10 a.m. 34.79 10.50 63.17 463.90 07Mar2018 11 a.m. 37.20 10.20 57.11 648.80 07Mar2018 12 p.m. 40.12 9.30 51.92 759.20 07Mar2018 1 p.m. 44.22 11.50 46.22 794.00 07Mar2018 2 p.m. 46.24 12.20 41.37 754.30 07Mar2018 3 p.m. 48.72 10.00 35.96 373.60 07Mar2018 4 p.m. 50.90 10.40 32.48 448.00 07Mar2018 5 p.m. 51.87 12.00 28.88 324.50 07Mar2018 6 p.m. 52.21 9.30 29.16 141.90 07Mar2018 7 p.m. 57.51 1.70 29.37 1.20 07Mar2018 8 p.m. 45.86 0.90 52.55 0.00 07Mar2018 9 p.m. 41.14 0.70 63.00 0.00 07Mar2018 10 p.m. 39.51 1.00 71.90 0.00 07Mar2018 11 p.m. 35.94 1.90 70.36 0.00 08Mar2018 12 a.m. 34.72 2.60 72.27 0.00 08Mar2018 1 a.m. 33.60 2.30 75.99 0.00 08Mar2018 2 a.m. 33.24 3.40 80.08 0.00 08Mar2018 3 a.m. 32.56 2.90 82.88 0.00 08Mar2018 4 a.m. 29.66 1.40 83.80 0.00 08Mar2018 5 a.m. 29.07 1.40 80.66 0.00 08Mar2018 6 a.m. 28.04 1.10 84.31 0.00 08Mar2018 7 a.m. 26.80 0.90 91.06 1.60 Accuml. Values 937.92 135.80 1464.47 5107.80 Num. Valid Values 24 24 24 24 Avg. Values 39.08 5.66 61.02 212.83 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.93 218.50 61.02 439.17 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3898 definition: xcompl = 1 - (RELH_avg/100) TdC = -2.8695 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 = 0.4642 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5358 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.6019 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 = 3.1626 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.9023 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.127 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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