Detailed Weather Data for Project: COPA

Date Time TAIR WSPD RELH SRAD 06Nov2017 8 a.m. 42.62 5.35 84.38 3.67 06Nov2017 9 a.m. 42.71 6.70 83.47 32.96 06Nov2017 10 a.m. 42.69 7.45 81.76 61.75 06Nov2017 11 a.m. 42.42 8.44 80.44 93.77 06Nov2017 12 p.m. 41.49 8.73 81.67 148.91 06Nov2017 1 p.m. 41.86 8.12 82.43 135.23 06Nov2017 2 p.m. 41.94 7.66 85.77 84.12 06Nov2017 3 p.m. 40.78 6.78 95.53 53.93 06Nov2017 4 p.m. 40.59 6.39 97.64 24.43 06Nov2017 5 p.m. 40.80 5.75 95.72 1.55 06Nov2017 6 p.m. 40.75 5.61 96.58 0.00 06Nov2017 7 p.m. 43.05 8.39 73.97 0.00 06Nov2017 8 p.m. 40.73 5.21 96.91 0.00 06Nov2017 9 p.m. 40.71 5.44 94.59 0.00 06Nov2017 10 p.m. 40.80 5.61 96.62 0.00 06Nov2017 11 p.m. 41.04 5.85 98.26 0.00 07Nov2017 12 a.m. 41.00 6.22 98.02 0.00 07Nov2017 1 a.m. 40.95 5.37 98.39 0.00 07Nov2017 2 a.m. 40.75 5.83 98.70 0.00 07Nov2017 3 a.m. 41.07 6.88 98.62 0.00 07Nov2017 4 a.m. 40.95 8.28 98.81 0.00 07Nov2017 5 a.m. 41.04 8.19 98.54 0.00 07Nov2017 6 a.m. 40.89 8.02 98.53 0.00 07Nov2017 7 a.m. 40.41 8.25 98.95 0.00 Accuml. Values 992.03 164.52 2214.30 640.32 Num. Valid Values 24 24 24 24 Avg. Values 41.33 6.86 92.26 26.68 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 5.19 264.71 92.26 55.05 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.0774 definition: xcompl = 1 - (RELH_avg/100) TdC = 4.0067 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 = 0.4834 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5166 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.5132 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 = 0.7022 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.8701 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.008 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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