Detailed Weather Data for Project: ARBU

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. 7.07 10.07 71.75 14.00 01Jan2018 9 a.m. 8.48 11.86 69.00 146.00 01Jan2018 10 a.m. 11.08 12.02 64.25 322.50 01Jan2018 11 a.m. 13.70 12.30 57.67 456.00 01Jan2018 12 p.m. 16.66 11.74 50.25 550.50 01Jan2018 1 p.m. 18.80 9.10 46.00 577.67 01Jan2018 2 p.m. 20.93 9.67 41.25 545.25 01Jan2018 3 p.m. 21.83 10.12 36.75 448.75 01Jan2018 4 p.m. 21.92 10.18 35.75 300.75 01Jan2018 5 p.m. 20.57 10.18 37.50 133.50 01Jan2018 6 p.m. 16.16 4.70 47.00 0.00 01Jan2018 7 p.m. 14.54 4.47 53.00 0.00 01Jan2018 8 p.m. 12.74 6.04 60.00 0.00 01Jan2018 9 p.m. 12.92 4.70 59.50 0.00 01Jan2018 10 p.m. 12.26 4.32 60.33 0.00 01Jan2018 11 p.m. 10.72 4.98 66.75 0.00 02Jan2018 12 a.m. 10.18 6.26 67.25 0.00 02Jan2018 1 a.m. 9.28 6.71 68.75 0.00 02Jan2018 2 a.m. 8.38 5.03 72.00 0.00 02Jan2018 3 a.m. 8.48 4.92 73.67 0.00 02Jan2018 4 a.m. 9.64 6.04 71.75 0.00 02Jan2018 5 a.m. 10.40 8.16 68.50 0.00 02Jan2018 6 a.m. 10.63 4.31 71.00 0.00 02Jan2018 7 a.m. 12.20 3.69 71.50 0.00 Accuml. Values 319.57 181.57 1421.17 3494.92 Num. Valid Values 24 24 24 24 Avg. Values 13.32 7.57 59.22 145.62 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -10.38 292.15 59.22 300.49 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4078 definition: xcompl = 1 - (RELH_avg/100) TdC = -16.8021 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 = 0.2518 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7482 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.4816 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 = 1.1413 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.4235 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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