Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 34.90 4.93 51.12 6.75 06Dec2017 9 a.m. 34.99 12.12 48.69 167.86 06Dec2017 10 a.m. 38.28 8.48 42.55 342.03 06Dec2017 11 a.m. 42.53 6.58 37.82 467.93 06Dec2017 12 p.m. 45.43 6.33 35.64 543.74 06Dec2017 1 p.m. 49.14 7.36 32.63 559.46 06Dec2017 2 p.m. 50.88 9.70 29.94 517.47 06Dec2017 3 p.m. 51.60 11.60 28.22 418.85 06Dec2017 4 p.m. 52.25 11.29 26.43 270.71 06Dec2017 5 p.m. 51.46 10.17 24.99 95.72 06Dec2017 6 p.m. 48.70 7.63 27.94 0.00 06Dec2017 7 p.m. 29.01 3.89 39.45 0.00 06Dec2017 8 p.m. 43.45 4.01 36.81 0.00 06Dec2017 9 p.m. 41.27 3.07 40.57 0.00 06Dec2017 10 p.m. 38.84 1.80 53.64 0.00 06Dec2017 11 p.m. 35.28 2.40 57.79 0.00 07Dec2017 12 a.m. 34.23 8.14 55.91 0.00 07Dec2017 1 a.m. 33.15 9.23 57.00 0.00 07Dec2017 2 a.m. 33.60 9.89 58.62 0.00 07Dec2017 3 a.m. 32.31 6.95 64.86 0.00 07Dec2017 4 a.m. 30.81 6.74 69.15 0.00 07Dec2017 5 a.m. 29.59 8.56 66.89 0.00 07Dec2017 6 a.m. 26.44 11.72 56.55 0.00 07Dec2017 7 a.m. 24.30 9.57 58.37 0.00 Accuml. Values 932.43 182.16 1101.58 3390.52 Num. Valid Values 24 24 24 24 Avg. Values 38.85 7.59 45.90 141.27 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.81 293.10 45.90 291.52 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5410 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.8573 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 = 0.4623 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5377 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.8740 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 = 4.3882 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.6667 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.133 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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