Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. 39.00 6.39 78.96 2.98 08Nov2017 9 a.m. 38.95 6.02 75.23 47.85 08Nov2017 10 a.m. 40.06 8.74 68.01 224.54 08Nov2017 11 a.m. 42.01 7.95 63.93 162.35 08Nov2017 12 p.m. 44.04 7.80 61.01 327.92 08Nov2017 1 p.m. 45.54 7.38 58.22 204.44 08Nov2017 2 p.m. 46.00 5.19 57.35 180.25 08Nov2017 3 p.m. 46.56 4.26 55.79 223.13 08Nov2017 4 p.m. 47.57 4.23 52.29 233.06 08Nov2017 5 p.m. 48.69 3.65 50.68 132.63 08Nov2017 6 p.m. 48.25 1.23 49.68 3.25 08Nov2017 7 p.m. 51.06 1.49 61.17 0.00 08Nov2017 8 p.m. 44.35 2.59 77.81 0.00 08Nov2017 9 p.m. 41.74 2.65 78.08 0.00 08Nov2017 10 p.m. 39.69 1.57 77.93 0.00 08Nov2017 11 p.m. 40.30 2.71 85.12 0.00 09Nov2017 12 a.m. 38.70 2.05 87.16 0.00 09Nov2017 1 a.m. 38.35 3.69 89.78 0.00 09Nov2017 2 a.m. 37.74 1.64 90.78 0.00 09Nov2017 3 a.m. 34.43 1.05 90.53 0.00 09Nov2017 4 a.m. 31.37 2.13 90.90 0.00 09Nov2017 5 a.m. 31.28 2.00 91.95 0.00 09Nov2017 6 a.m. 31.15 1.58 93.32 0.00 09Nov2017 7 a.m. 34.56 2.12 93.86 0.00 Accuml. Values 981.39 90.11 1779.54 1742.40 Num. Valid Values 24 24 24 24 Avg. Values 40.89 3.75 74.15 72.60 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.94 144.99 74.15 149.81 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2585 definition: xcompl = 1 - (RELH_avg/100) TdC = 0.7511 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 = 0.4796 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5204 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.4093 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 = 2.2433 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.7112 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.043 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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