Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 28.87 6.05 66.03 94.27 07Mar2018 9 a.m. 30.18 7.45 63.71 284.00 07Mar2018 10 a.m. 32.92 8.40 58.85 562.41 07Mar2018 11 a.m. 35.76 9.47 53.91 720.49 07Mar2018 12 p.m. 38.97 10.16 49.11 830.91 07Mar2018 1 p.m. 42.13 10.32 41.27 861.37 07Mar2018 2 p.m. 45.59 9.29 32.98 826.11 07Mar2018 3 p.m. 47.91 8.67 29.39 735.53 07Mar2018 4 p.m. 49.86 8.43 26.44 584.82 07Mar2018 5 p.m. 50.81 8.70 25.74 390.14 07Mar2018 6 p.m. 50.72 8.66 25.96 157.11 07Mar2018 7 p.m. 61.29 9.46 24.85 5.32 07Mar2018 8 p.m. 45.90 1.63 49.54 0.00 07Mar2018 9 p.m. 41.41 2.83 62.66 0.00 07Mar2018 10 p.m. 39.45 3.74 68.68 0.00 07Mar2018 11 p.m. 38.77 2.81 73.21 0.00 08Mar2018 12 a.m. 37.15 3.06 75.69 0.00 08Mar2018 1 a.m. 36.55 3.43 78.33 0.00 08Mar2018 2 a.m. 37.31 7.52 71.60 0.00 08Mar2018 3 a.m. 37.33 4.92 74.21 0.00 08Mar2018 4 a.m. 36.18 4.20 80.66 0.00 08Mar2018 5 a.m. 30.72 4.61 82.71 0.00 08Mar2018 6 a.m. 27.34 3.55 83.76 0.00 08Mar2018 7 a.m. 29.16 1.42 85.07 0.00 Accuml. Values 952.27 148.78 1384.36 6052.48 Num. Valid Values 24 24 24 24 Avg. Values 39.68 6.20 57.68 252.19 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.27 239.39 57.68 520.39 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4232 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.3249 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 = 0.4693 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5307 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.6484 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 = 3.5206 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.3729 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.156 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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