Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 21.54 9.49 90.40 0.00 30Dec2017 9 a.m. 20.62 9.48 91.71 0.00 30Dec2017 10 a.m. 19.58 9.89 92.01 7.71 30Dec2017 11 a.m. 18.50 11.35 90.50 31.46 30Dec2017 12 p.m. 18.18 10.47 89.40 54.54 30Dec2017 1 p.m. 17.92 9.73 88.49 67.04 30Dec2017 2 p.m. 18.14 8.70 84.60 86.19 30Dec2017 3 p.m. 18.41 8.47 80.72 75.98 30Dec2017 4 p.m. 18.55 7.95 78.26 45.61 30Dec2017 5 p.m. 18.46 7.64 76.21 8.94 30Dec2017 6 p.m. 18.14 7.69 74.15 0.00 30Dec2017 7 p.m. 15.51 7.60 41.52 0.00 30Dec2017 8 p.m. 17.89 6.47 72.55 0.00 30Dec2017 9 p.m. 18.05 5.52 73.90 0.00 30Dec2017 10 p.m. 18.25 6.79 75.44 0.00 30Dec2017 11 p.m. 18.57 5.01 75.93 0.00 31Dec2017 12 a.m. 18.73 5.11 78.32 0.00 31Dec2017 1 a.m. 18.77 7.92 79.58 0.00 31Dec2017 2 a.m. 18.72 9.90 81.32 0.00 31Dec2017 3 a.m. 17.98 13.36 81.33 0.00 31Dec2017 4 a.m. 15.85 11.19 79.54 0.00 31Dec2017 5 a.m. 14.49 14.25 80.41 0.00 31Dec2017 6 a.m. 13.64 12.36 78.47 0.00 31Dec2017 7 a.m. 13.78 10.27 70.55 0.00 Accuml. Values 428.29 216.61 1905.31 377.47 Num. Valid Values 24 24 24 24 Avg. Values 17.85 9.03 79.39 15.73 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -7.86 348.53 79.39 32.45 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2061 definition: xcompl = 1 - (RELH_avg/100) TdC = -10.8060 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 = 0.2863 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7137 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.7722 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 = 0.7044 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.0511 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.021 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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