Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 34.16 11.07 76.59 0.00 29Dec2017 9 a.m. 33.78 11.35 80.99 9.56 29Dec2017 10 a.m. 33.93 13.79 83.88 40.51 29Dec2017 11 a.m. 35.04 17.06 84.97 51.60 29Dec2017 12 p.m. 35.33 18.47 87.56 26.51 29Dec2017 1 p.m. 35.91 18.00 87.97 61.90 29Dec2017 2 p.m. 38.07 15.30 81.37 67.48 29Dec2017 3 p.m. 39.56 13.62 77.95 81.94 29Dec2017 4 p.m. 40.57 16.05 75.89 62.85 29Dec2017 5 p.m. 40.51 13.95 77.47 2.86 29Dec2017 6 p.m. 40.66 10.72 77.49 0.00 29Dec2017 7 p.m. 17.83 8.11 71.89 0.00 29Dec2017 8 p.m. 40.68 1.31 76.54 0.00 29Dec2017 9 p.m. 40.32 1.69 77.20 0.00 29Dec2017 10 p.m. 39.04 2.96 80.74 0.00 29Dec2017 11 p.m. 36.99 4.12 84.84 0.00 30Dec2017 12 a.m. 34.38 2.31 88.83 0.00 30Dec2017 1 a.m. 32.77 1.77 90.05 0.00 30Dec2017 2 a.m. 32.70 1.17 91.95 0.00 30Dec2017 3 a.m. 32.49 8.80 92.44 0.00 30Dec2017 4 a.m. 31.55 11.66 87.26 0.00 30Dec2017 5 a.m. 28.72 11.31 84.65 0.00 30Dec2017 6 a.m. 26.08 11.16 84.83 0.00 30Dec2017 7 a.m. 23.16 11.36 86.61 0.00 Accuml. Values 824.21 237.11 1989.96 405.21 Num. Valid Values 24 24 24 24 Avg. Values 34.34 9.88 82.91 16.88 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 1.30 381.51 82.91 34.84 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1709 definition: xcompl = 1 - (RELH_avg/100) TdC = -1.2887 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 = 0.4236 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5764 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.7210 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 = 1.1577 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.7363 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.027 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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