Detailed Weather Data for Project: ROBE

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 48.83 5.97 100.28 8.00 07Nov2017 9 a.m. 49.39 4.57 0.37 36.00 07Nov2017 10 a.m. 50.68 4.50 0.43 67.00 07Nov2017 11 a.m. 52.56 5.34 0.49 117.00 07Nov2017 12 p.m. 53.20 6.16 0.49 155.00 07Nov2017 1 p.m. 53.44 8.08 0.49 157.00 07Nov2017 2 p.m. 52.99 8.31 0.43 86.00 07Nov2017 3 p.m. 52.21 7.66 1.04 46.00 07Nov2017 4 p.m. 50.13 7.79 100.27 33.00 07Nov2017 5 p.m. 49.69 6.92 0.43 19.00 07Nov2017 6 p.m. 50.02 5.41 0.55 1.00 07Nov2017 7 p.m. 48.27 0.22 100.27 0.00 07Nov2017 8 p.m. 48.38 6.36 0.49 0.00 07Nov2017 9 p.m. 48.49 6.16 0.49 1.00 07Nov2017 10 p.m. 48.04 6.44 0.73 0.00 07Nov2017 11 p.m. 47.80 6.51 0.49 0.00 08Nov2017 12 a.m. 48.34 4.02 0.98 0.00 08Nov2017 1 a.m. 47.48 4.05 0.55 0.00 08Nov2017 2 a.m. 46.92 4.59 0.49 0.00 08Nov2017 3 a.m. 47.80 2.85 0.49 0.00 08Nov2017 4 a.m. 48.02 3.59 0.49 0.00 08Nov2017 5 a.m. 47.91 3.66 100.43 0.00 08Nov2017 6 a.m. 48.13 4.16 100.37 0.00 08Nov2017 7 a.m. 47.70 4.11 0.55 1.00 Accuml. Values 1186.43 127.43 512.09 727.00 Num. Valid Values 24 24 24 24 Avg. Values 49.43 5.31 21.34 30.29 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 9.69 205.03 21.34 62.51 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.7866 definition: xcompl = 1 - (RELH_avg/100) TdC = -11.4611 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 = 0.5507 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4493 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.3969 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 = 9.5146 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.3668 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.122 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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