Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 06Nov2017 8 a.m. 44.78 6.70 85.71 0.00 06Nov2017 9 a.m. 44.64 6.36 88.85 17.64 06Nov2017 10 a.m. 44.71 6.62 92.07 63.29 06Nov2017 11 a.m. 44.85 7.00 89.86 75.28 06Nov2017 12 p.m. 45.82 6.65 85.36 114.70 06Nov2017 1 p.m. 47.21 6.00 82.57 145.26 06Nov2017 2 p.m. 48.27 6.35 79.22 159.32 06Nov2017 3 p.m. 49.26 6.64 73.65 143.98 06Nov2017 4 p.m. 48.65 7.28 72.63 84.59 06Nov2017 5 p.m. 47.21 7.55 74.50 20.15 06Nov2017 6 p.m. 46.33 5.83 74.19 0.00 06Nov2017 7 p.m. 43.86 9.11 68.03 0.00 06Nov2017 8 p.m. 44.64 5.27 74.86 0.00 06Nov2017 9 p.m. 43.99 5.68 76.45 0.00 06Nov2017 10 p.m. 43.61 4.19 77.62 0.00 06Nov2017 11 p.m. 43.16 5.16 79.18 0.00 07Nov2017 12 a.m. 42.73 5.55 80.86 0.00 07Nov2017 1 a.m. 42.71 4.88 82.15 0.00 07Nov2017 2 a.m. 42.87 4.97 84.44 0.00 07Nov2017 3 a.m. 42.82 5.44 85.18 0.00 07Nov2017 4 a.m. 42.64 6.72 84.30 0.00 07Nov2017 5 a.m. 42.35 8.16 82.53 0.00 07Nov2017 6 a.m. 42.04 7.50 81.80 0.00 07Nov2017 7 a.m. 41.95 8.33 81.50 0.00 Accuml. Values 1071.10 153.94 1937.51 824.21 Num. Valid Values 24 24 24 24 Avg. Values 44.63 6.41 80.73 34.34 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 7.02 247.69 80.73 70.87 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1927 definition: xcompl = 1 - (RELH_avg/100) TdC = 3.9397 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 = 0.5111 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4889 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.3430 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 = 1.9359 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.0357 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.032 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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