Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 11.79 3.54 58.91 0.00 02Jan2018 9 a.m. 12.27 3.05 58.84 12.17 02Jan2018 10 a.m. 13.33 2.60 58.10 56.93 02Jan2018 11 a.m. 15.17 2.07 55.86 111.66 02Jan2018 12 p.m. 16.70 2.54 52.63 176.45 02Jan2018 1 p.m. 17.98 3.51 50.97 193.26 02Jan2018 2 p.m. 18.41 2.96 48.81 147.88 02Jan2018 3 p.m. 18.77 3.11 48.66 101.76 02Jan2018 4 p.m. 19.36 3.39 48.23 82.31 02Jan2018 5 p.m. 19.54 5.91 47.83 21.72 02Jan2018 6 p.m. 19.17 7.05 47.78 0.00 02Jan2018 7 p.m. 34.14 4.20 42.72 0.00 02Jan2018 8 p.m. 19.18 5.11 46.66 0.00 02Jan2018 9 p.m. 19.51 7.05 47.67 0.00 02Jan2018 10 p.m. 19.38 9.68 50.33 0.00 02Jan2018 11 p.m. 18.46 9.37 56.42 0.00 03Jan2018 12 a.m. 17.92 10.36 60.97 0.00 03Jan2018 1 a.m. 17.65 11.58 63.44 0.00 03Jan2018 2 a.m. 17.83 12.02 63.55 0.00 03Jan2018 3 a.m. 18.59 14.46 60.77 0.00 03Jan2018 4 a.m. 19.83 12.50 60.73 0.00 03Jan2018 5 a.m. 20.26 11.07 59.88 0.00 03Jan2018 6 a.m. 20.23 10.18 58.59 0.00 03Jan2018 7 a.m. 20.19 8.39 54.91 0.00 Accuml. Values 445.69 165.70 1303.26 904.14 Num. Valid Values 24 24 24 24 Avg. Values 18.57 6.90 54.30 37.67 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -7.46 266.61 54.30 77.74 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4570 definition: xcompl = 1 - (RELH_avg/100) TdC = -15.1210 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 = 0.2920 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7080 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.4120 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 = 1.6119 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.8161 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.046 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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