Detailed Weather Data for Project: HULA

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 8.82 3.10 52.46 0.00 02Jan2018 9 a.m. 9.03 2.90 53.37 22.00 02Jan2018 10 a.m. 9.81 1.90 52.56 68.60 02Jan2018 11 a.m. 11.32 1.20 51.15 134.30 02Jan2018 12 p.m. 12.81 2.10 51.55 246.80 02Jan2018 1 p.m. 15.91 3.50 46.89 618.80 02Jan2018 2 p.m. 18.37 4.60 43.28 607.00 02Jan2018 3 p.m. 21.31 3.80 37.52 535.40 02Jan2018 4 p.m. 23.68 2.70 33.46 405.20 02Jan2018 5 p.m. 23.99 3.40 32.44 99.60 02Jan2018 6 p.m. 20.93 3.20 36.71 0.00 02Jan2018 7 p.m. 27.05 4.30 43.96 0.00 02Jan2018 8 p.m. 19.13 5.90 41.29 0.00 02Jan2018 9 p.m. 18.68 9.00 46.77 0.00 02Jan2018 10 p.m. 17.44 8.50 47.23 0.00 02Jan2018 11 p.m. 15.94 6.60 45.03 0.00 03Jan2018 12 a.m. 15.40 6.80 46.72 0.00 03Jan2018 1 a.m. 14.59 6.00 49.38 0.00 03Jan2018 2 a.m. 15.10 8.00 51.83 0.00 03Jan2018 3 a.m. 16.05 8.20 50.13 0.00 03Jan2018 4 a.m. 14.86 5.10 51.28 0.00 03Jan2018 5 a.m. 15.33 6.90 56.68 0.00 03Jan2018 6 a.m. 15.60 7.20 58.56 0.00 03Jan2018 7 a.m. 14.65 7.40 59.52 0.00 Accuml. Values 395.81 122.30 1139.77 2737.70 Num. Valid Values 24 24 24 24 Avg. Values 16.49 5.10 47.49 114.07 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -8.62 196.78 47.49 235.39 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5251 definition: xcompl = 1 - (RELH_avg/100) TdC = -17.8441 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 = 0.2758 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7242 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.9241 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 = 1.6978 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.5784 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.055 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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