Detailed Weather Data for Project: ROBE

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. 47.80 4.65 0.55 40.00 08Nov2017 9 a.m. 48.90 4.56 0.55 110.00 08Nov2017 10 a.m. 49.14 5.50 0.55 154.00 08Nov2017 11 a.m. 49.46 5.03 0.49 141.00 08Nov2017 12 p.m. 50.90 4.54 0.92 194.00 08Nov2017 1 p.m. 51.67 3.30 0.43 241.00 08Nov2017 2 p.m. 52.66 4.31 0.37 214.00 08Nov2017 3 p.m. 53.65 4.08 0.49 114.00 08Nov2017 4 p.m. 53.76 4.25 0.49 130.00 08Nov2017 5 p.m. 53.33 2.69 0.67 61.00 08Nov2017 6 p.m. 52.45 1.20 0.73 4.00 08Nov2017 7 p.m. 50.36 0.43 0.43 0.00 08Nov2017 8 p.m. 45.61 0.23 99.34 0.00 08Nov2017 9 p.m. 44.74 0.46 100.39 0.00 08Nov2017 10 p.m. 44.96 0.67 100.32 0.00 08Nov2017 11 p.m. 45.95 2.33 100.33 0.00 09Nov2017 12 a.m. 42.66 0.50 100.39 0.00 09Nov2017 1 a.m. 40.35 1.59 0.43 0.00 09Nov2017 2 a.m. 39.90 0.90 0.55 0.00 09Nov2017 3 a.m. 39.24 1.23 0.49 0.00 09Nov2017 4 a.m. 40.35 0.90 0.49 0.00 09Nov2017 5 a.m. 40.24 1.08 0.43 0.00 09Nov2017 6 a.m. 38.59 2.60 0.43 0.00 09Nov2017 7 a.m. 37.81 1.00 0.49 1.00 Accuml. Values 1114.50 58.03 510.75 1404.00 Num. Valid Values 24 24 24 24 Avg. Values 46.44 2.42 21.28 58.50 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 8.02 93.37 21.28 120.72 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.7872 definition: xcompl = 1 - (RELH_avg/100) TdC = -12.8902 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 = 0.5262 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4738 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.1767 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 = 8.5120 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.5474 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.088 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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