Detailed Weather Data for Project: HULA

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. -2.49 6.50 71.77 2.80 01Jan2018 9 a.m. -1.77 6.40 69.24 152.80 01Jan2018 10 a.m. 0.57 5.90 61.73 363.60 01Jan2018 11 a.m. 3.40 5.20 54.52 536.50 01Jan2018 12 p.m. 5.76 5.60 48.72 646.70 01Jan2018 1 p.m. 8.55 4.70 44.17 679.50 01Jan2018 2 p.m. 10.56 4.30 40.50 637.30 01Jan2018 3 p.m. 12.24 4.10 38.05 513.90 01Jan2018 4 p.m. 12.87 5.10 36.28 333.70 01Jan2018 5 p.m. 12.56 6.10 36.59 126.40 01Jan2018 6 p.m. 10.81 4.10 40.37 0.40 01Jan2018 7 p.m. 20.28 6.60 40.72 0.00 01Jan2018 8 p.m. 10.20 2.20 44.56 0.00 01Jan2018 9 p.m. 10.00 2.30 48.80 0.00 01Jan2018 10 p.m. 10.38 3.50 49.65 0.00 01Jan2018 11 p.m. 10.45 4.70 48.96 0.00 02Jan2018 12 a.m. 10.53 5.60 48.24 0.00 02Jan2018 1 a.m. 10.38 5.00 47.27 0.00 02Jan2018 2 a.m. 9.73 3.80 50.46 0.00 02Jan2018 3 a.m. 9.77 3.00 49.15 0.00 02Jan2018 4 a.m. 9.61 3.40 49.50 0.00 02Jan2018 5 a.m. 9.27 4.30 49.73 0.00 02Jan2018 6 a.m. 9.12 4.10 50.07 0.00 02Jan2018 7 a.m. 9.00 4.60 51.11 0.00 Accuml. Values 211.78 111.10 1170.16 3993.60 Num. Valid Values 24 24 24 24 Avg. Values 8.82 4.63 48.76 166.40 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -12.88 178.76 48.76 343.37 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5124 definition: xcompl = 1 - (RELH_avg/100) TdC = -21.4636 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 = 0.2196 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7804 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.8182 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 = 1.1777 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.0837 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.049 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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