Detailed Weather Data for Project: HULA

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 9.07 10.30 58.48 0.00 31Dec2017 9 a.m. 8.37 11.80 59.80 102.10 31Dec2017 10 a.m. 8.24 11.50 56.97 245.50 31Dec2017 11 a.m. 10.40 11.10 45.64 411.10 31Dec2017 12 p.m. 12.58 11.60 40.39 580.00 31Dec2017 1 p.m. 13.89 12.60 36.50 581.10 31Dec2017 2 p.m. 14.67 11.40 36.37 553.80 31Dec2017 3 p.m. 15.17 12.40 40.56 473.20 31Dec2017 4 p.m. 14.56 11.60 40.97 250.70 31Dec2017 5 p.m. 13.26 10.80 42.39 67.60 31Dec2017 6 p.m. 11.75 8.80 45.18 0.00 31Dec2017 7 p.m. 10.00 3.10 42.65 0.00 31Dec2017 8 p.m. 10.06 8.90 48.18 0.00 31Dec2017 9 p.m. 8.69 8.50 50.07 0.00 31Dec2017 10 p.m. 7.38 8.20 52.30 0.00 31Dec2017 11 p.m. 6.17 8.10 55.19 0.00 01Jan2018 12 a.m. 4.91 6.80 58.30 0.00 01Jan2018 1 a.m. 3.60 6.40 60.88 0.00 01Jan2018 2 a.m. 2.46 5.40 64.12 0.00 01Jan2018 3 a.m. 1.47 6.90 66.07 0.00 01Jan2018 4 a.m. 0.55 7.50 66.60 0.00 01Jan2018 5 a.m. -0.24 6.30 68.66 0.00 01Jan2018 6 a.m. -1.01 5.70 72.41 0.00 01Jan2018 7 a.m. -1.73 5.90 72.80 0.00 Accuml. Values 184.26 211.60 1281.48 3265.10 Num. Valid Values 24 24 24 24 Avg. Values 7.68 8.82 53.40 136.05 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -13.51 340.46 53.40 280.73 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4660 definition: xcompl = 1 - (RELH_avg/100) TdC = -20.9848 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 = 0.2118 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7882 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.2366 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 = 1.0149 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.4257 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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