Detailed Weather Data for Project: ROBE

Date Time TAIR WSPD RELH SRAD 06Nov2017 8 a.m. 57.96 2.44 0.43 15.00 06Nov2017 9 a.m. 58.17 5.32 0.43 31.00 06Nov2017 10 a.m. 59.16 3.13 0.43 60.00 06Nov2017 11 a.m. 58.84 5.58 0.55 79.00 06Nov2017 12 p.m. 58.28 3.84 0.31 77.00 06Nov2017 1 p.m. 58.60 2.86 0.37 71.00 06Nov2017 2 p.m. 58.37 2.14 0.43 72.00 06Nov2017 3 p.m. 59.14 1.42 100.27 50.00 06Nov2017 4 p.m. 58.28 1.40 100.28 34.00 06Nov2017 5 p.m. 57.18 6.23 100.28 11.00 06Nov2017 6 p.m. 53.89 9.15 100.40 1.00 06Nov2017 7 p.m. 49.57 5.41 0.43 0.00 06Nov2017 8 p.m. 51.80 7.89 100.22 0.00 06Nov2017 9 p.m. 49.93 10.22 100.22 0.00 06Nov2017 10 p.m. 48.72 9.46 100.34 0.00 06Nov2017 11 p.m. 48.27 8.72 100.22 0.00 07Nov2017 12 a.m. 48.16 7.80 100.28 0.00 07Nov2017 1 a.m. 48.38 7.05 100.28 0.00 07Nov2017 2 a.m. 47.95 6.35 100.35 0.00 07Nov2017 3 a.m. 48.27 6.58 63.39 0.00 07Nov2017 4 a.m. 47.95 7.35 0.49 0.00 07Nov2017 5 a.m. 48.16 7.79 0.43 0.00 07Nov2017 6 a.m. 47.73 7.81 0.43 0.00 07Nov2017 7 a.m. 48.29 6.22 0.49 1.00 Accuml. Values 1271.06 142.16 1171.75 502.00 Num. Valid Values 24 24 24 24 Avg. Values 52.96 5.92 48.82 20.92 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 11.65 228.74 48.82 43.16 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5118 definition: xcompl = 1 - (RELH_avg/100) TdC = 1.2119 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 = 0.5787 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4213 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.5778 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 = 7.0449 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.0380 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.087 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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