Detailed Weather Data for Project: HULA

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 47.79 3.80 98.01 0.00 04Nov2017 9 a.m. 47.71 4.30 99.16 7.10 04Nov2017 10 a.m. 48.24 4.70 99.29 62.80 04Nov2017 11 a.m. 49.62 4.80 99.18 94.20 04Nov2017 12 p.m. 51.04 2.10 98.07 103.60 04Nov2017 1 p.m. 51.87 3.10 98.52 130.00 04Nov2017 2 p.m. 52.90 1.70 98.46 128.50 04Nov2017 3 p.m. 52.79 2.20 99.23 175.20 04Nov2017 4 p.m. 54.48 2.10 94.25 152.70 04Nov2017 5 p.m. 56.43 2.30 86.51 84.40 04Nov2017 6 p.m. 56.50 1.80 85.86 56.00 04Nov2017 7 p.m. 54.28 4.20 91.84 1.40 04Nov2017 8 p.m. 51.46 2.80 73.34 0.00 04Nov2017 9 p.m. 51.71 2.40 96.70 0.00 04Nov2017 10 p.m. 50.58 1.60 99.13 0.00 04Nov2017 11 p.m. 50.04 1.50 99.21 0.00 05Nov2017 12 a.m. 49.23 1.60 99.33 0.00 05Nov2017 1 a.m. 48.51 0.90 99.35 0.00 05Nov2017 2 a.m. 49.01 0.60 99.39 0.00 05Nov2017 3 a.m. 47.48 2.90 99.37 0.00 05Nov2017 4 a.m. 48.81 4.30 99.43 0.00 05Nov2017 5 a.m. 54.55 4.10 99.64 0.00 05Nov2017 6 a.m. 59.70 4.00 99.86 0.00 05Nov2017 7 a.m. 57.96 4.40 99.77 0.00 Accuml. Values 1242.68 68.20 2312.90 995.90 Num. Valid Values 24 24 24 24 Avg. Values 51.78 2.84 96.37 41.50 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 10.99 109.73 96.37 85.63 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.0363 definition: xcompl = 1 - (RELH_avg/100) TdC = 10.4136 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 = 0.5694 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4306 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.1388 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 = 0.4928 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.3960 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.004 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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