Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 41.92 7.13 80.72 5.12 07Nov2017 9 a.m. 42.08 8.57 81.31 23.33 07Nov2017 10 a.m. 42.10 8.36 84.91 35.88 07Nov2017 11 a.m. 42.69 9.62 85.69 94.73 07Nov2017 12 p.m. 42.66 10.04 87.11 85.51 07Nov2017 1 p.m. 42.62 8.86 86.36 68.93 07Nov2017 2 p.m. 42.73 10.95 76.20 142.12 07Nov2017 3 p.m. 44.06 11.53 70.70 155.02 07Nov2017 4 p.m. 44.83 11.58 67.61 110.71 07Nov2017 5 p.m. 44.29 10.74 69.81 16.55 07Nov2017 6 p.m. 43.29 9.82 75.12 0.00 07Nov2017 7 p.m. 46.65 2.08 62.76 0.00 07Nov2017 8 p.m. 43.74 8.84 64.48 0.00 07Nov2017 9 p.m. 43.02 11.06 60.89 0.00 07Nov2017 10 p.m. 42.49 9.96 64.64 0.00 07Nov2017 11 p.m. 42.19 10.58 68.44 0.00 08Nov2017 12 a.m. 41.11 11.19 72.66 0.00 08Nov2017 1 a.m. 41.05 8.70 72.32 0.00 08Nov2017 2 a.m. 41.20 8.24 71.11 0.00 08Nov2017 3 a.m. 41.14 4.05 73.29 0.00 08Nov2017 4 a.m. 40.42 3.83 81.09 0.00 08Nov2017 5 a.m. 39.33 5.53 88.25 0.00 08Nov2017 6 a.m. 39.49 5.18 88.50 0.00 08Nov2017 7 a.m. 39.49 3.70 85.70 0.00 Accuml. Values 1014.58 200.14 1819.67 737.90 Num. Valid Values 24 24 24 24 Avg. Values 42.27 8.34 75.82 30.75 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 5.71 322.03 75.82 63.44 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2418 definition: xcompl = 1 - (RELH_avg/100) TdC = 1.8007 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 = 0.4913 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5087 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.4288 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 = 2.2135 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.7242 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.046 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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