Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 47.07 3.62 93.97 2.72 03Dec2017 9 a.m. 47.61 3.04 94.64 81.82 03Dec2017 10 a.m. 50.67 4.00 95.15 189.10 03Dec2017 11 a.m. 56.25 8.17 80.63 357.51 03Dec2017 12 p.m. 59.94 10.88 62.76 235.39 03Dec2017 1 p.m. 62.55 13.20 66.83 233.09 03Dec2017 2 p.m. 64.56 12.49 65.23 274.72 03Dec2017 3 p.m. 67.46 12.47 60.80 219.24 03Dec2017 4 p.m. 71.26 13.11 55.50 226.73 03Dec2017 5 p.m. 72.23 14.27 53.81 73.60 03Dec2017 6 p.m. 71.11 11.65 53.80 0.00 03Dec2017 7 p.m. 59.16 11.83 20.63 0.00 03Dec2017 8 p.m. 68.04 10.93 60.71 0.00 03Dec2017 9 p.m. 67.91 16.83 65.45 0.00 03Dec2017 10 p.m. 66.52 21.99 73.82 0.00 03Dec2017 11 p.m. 65.48 20.27 78.07 0.00 04Dec2017 12 a.m. 64.69 22.73 80.56 0.00 04Dec2017 1 a.m. 64.47 23.69 82.32 0.00 04Dec2017 2 a.m. 64.83 22.34 82.00 0.00 04Dec2017 3 a.m. 64.96 21.35 81.42 0.00 04Dec2017 4 a.m. 64.42 20.11 82.49 0.00 04Dec2017 5 a.m. 65.26 21.01 80.73 0.00 04Dec2017 6 a.m. 65.07 21.18 81.20 0.00 04Dec2017 7 a.m. 64.71 20.79 82.39 0.00 Accuml. Values 1516.21 361.95 1734.91 1893.92 Num. Valid Values 24 24 24 24 Avg. Values 63.18 15.08 72.29 78.91 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 17.32 582.38 72.29 162.84 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2771 definition: xcompl = 1 - (RELH_avg/100) TdC = 12.3570 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 = 0.6544 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3456 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.9058 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 = 5.4121 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 9.3200 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.150 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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