Detailed Weather Data for Project: ROBE

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. 9.36 5.27 66.14 9.00 01Jan2018 9 a.m. 11.12 6.24 62.17 159.00 01Jan2018 10 a.m. 12.78 6.63 56.13 346.00 01Jan2018 11 a.m. 15.40 5.22 52.16 500.00 01Jan2018 12 p.m. 17.49 4.37 44.59 600.00 01Jan2018 1 p.m. 19.71 3.06 43.06 634.00 01Jan2018 2 p.m. 21.88 2.55 36.28 525.00 01Jan2018 3 p.m. 22.77 3.34 36.34 459.00 01Jan2018 4 p.m. 23.43 4.00 35.85 334.00 01Jan2018 5 p.m. 22.33 4.15 37.38 141.00 01Jan2018 6 p.m. 20.35 5.12 40.31 5.00 01Jan2018 7 p.m. 24.10 3.26 39.51 0.00 01Jan2018 8 p.m. 18.59 4.90 41.96 0.00 01Jan2018 9 p.m. 17.71 5.36 43.24 0.00 01Jan2018 10 p.m. 18.81 2.83 48.19 0.00 01Jan2018 11 p.m. 18.05 2.31 55.51 0.00 02Jan2018 12 a.m. 17.82 1.14 58.45 0.00 02Jan2018 1 a.m. 18.37 2.34 66.94 0.00 02Jan2018 2 a.m. 18.37 1.87 59.06 0.00 02Jan2018 3 a.m. 18.48 3.38 55.63 0.00 02Jan2018 4 a.m. 18.81 2.61 54.77 0.00 02Jan2018 5 a.m. 18.14 2.04 58.79 0.00 02Jan2018 6 a.m. 18.57 1.74 57.27 0.00 02Jan2018 7 a.m. 18.68 2.15 54.46 0.00 Accuml. Values 441.12 85.88 1204.19 3712.00 Num. Valid Values 24 24 24 24 Avg. Values 18.38 3.58 50.17 154.67 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -7.57 138.18 50.17 319.16 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4983 definition: xcompl = 1 - (RELH_avg/100) TdC = -16.1998 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 = 0.2905 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7095 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.7370 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 = 1.7464 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.3406 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.057 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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