Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 13.10 12.89 69.18 0.29 31Dec2017 9 a.m. 12.94 12.72 61.24 37.55 31Dec2017 10 a.m. 12.74 14.22 58.39 158.35 31Dec2017 11 a.m. 13.78 14.74 54.45 451.66 31Dec2017 12 p.m. 15.48 14.23 49.15 565.65 31Dec2017 1 p.m. 16.47 12.99 42.75 524.67 31Dec2017 2 p.m. 17.33 12.64 37.71 458.59 31Dec2017 3 p.m. 18.36 13.05 34.09 398.36 31Dec2017 4 p.m. 19.02 13.61 31.74 296.71 31Dec2017 5 p.m. 18.36 13.66 33.04 65.70 31Dec2017 6 p.m. 16.54 10.19 35.91 0.00 31Dec2017 7 p.m. 14.29 5.13 43.31 0.00 31Dec2017 8 p.m. 14.47 10.91 45.66 0.00 31Dec2017 9 p.m. 12.92 11.53 47.63 0.00 31Dec2017 10 p.m. 11.80 7.30 50.27 0.00 31Dec2017 11 p.m. 11.16 7.38 51.31 0.00 01Jan2018 12 a.m. 10.31 7.13 52.41 0.00 01Jan2018 1 a.m. 9.16 7.72 52.58 0.00 01Jan2018 2 a.m. 7.95 7.21 55.14 0.00 01Jan2018 3 a.m. 7.07 7.13 57.19 0.00 01Jan2018 4 a.m. 6.37 7.44 59.39 0.00 01Jan2018 5 a.m. 5.81 5.74 60.78 0.00 01Jan2018 6 a.m. 4.93 5.25 64.55 0.00 01Jan2018 7 a.m. 4.01 5.37 67.19 0.00 Accuml. Values 294.35 240.18 1215.06 2957.53 Num. Valid Values 24 24 24 24 Avg. Values 12.26 10.01 50.63 123.23 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -10.96 386.45 50.63 254.29 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4937 definition: xcompl = 1 - (RELH_avg/100) TdC = -19.2441 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 = 0.2441 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7559 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.0481 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 = 1.3237 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.9719 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.069 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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