Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. 42.44 3.60 93.51 9.19 02Dec2017 9 a.m. 43.52 1.93 94.25 143.08 02Dec2017 10 a.m. 48.72 2.72 93.65 303.62 02Dec2017 11 a.m. 54.97 1.75 84.61 436.99 02Dec2017 12 p.m. 58.35 2.74 68.91 514.48 02Dec2017 1 p.m. 62.20 3.98 61.27 528.42 02Dec2017 2 p.m. 64.83 5.40 56.17 479.46 02Dec2017 3 p.m. 66.16 4.25 53.80 382.26 02Dec2017 4 p.m. 67.44 3.74 51.98 231.64 02Dec2017 5 p.m. 66.99 3.76 53.03 61.45 02Dec2017 6 p.m. 64.69 3.58 57.38 0.43 02Dec2017 7 p.m. 69.17 8.77 57.51 0.00 02Dec2017 8 p.m. 56.26 1.44 77.02 0.00 02Dec2017 9 p.m. 53.56 1.46 82.12 0.00 02Dec2017 10 p.m. 51.39 1.23 84.36 0.00 02Dec2017 11 p.m. 48.56 1.95 85.55 0.00 03Dec2017 12 a.m. 46.33 2.32 88.66 0.00 03Dec2017 1 a.m. 45.43 2.71 89.82 0.00 03Dec2017 2 a.m. 45.59 2.51 91.09 0.00 03Dec2017 3 a.m. 45.61 1.01 91.84 0.00 03Dec2017 4 a.m. 46.90 0.70 91.94 0.00 03Dec2017 5 a.m. 46.06 0.87 91.74 0.00 03Dec2017 6 a.m. 45.07 0.80 91.84 0.00 03Dec2017 7 a.m. 45.99 1.39 92.93 0.00 Accuml. Values 1286.24 64.61 1884.98 3091.02 Num. Valid Values 24 24 24 24 Avg. Values 53.59 2.69 78.54 128.79 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 12.00 103.96 78.54 265.77 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2146 definition: xcompl = 1 - (RELH_avg/100) TdC = 8.4100 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 = 0.5837 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4163 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.9503 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 = 2.9934 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.8934 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.076 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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