Detailed Weather Data for Project: HULA

Date Time TAIR WSPD RELH SRAD 05Nov2017 8 a.m. 54.91 5.60 99.68 33.10 05Nov2017 9 a.m. 54.46 4.20 99.70 170.80 05Nov2017 10 a.m. 53.02 8.40 99.43 238.00 05Nov2017 11 a.m. 53.42 10.00 98.73 132.70 05Nov2017 12 p.m. 53.64 11.10 94.34 93.20 05Nov2017 1 p.m. 53.15 12.00 88.01 118.00 05Nov2017 2 p.m. 53.02 11.00 82.57 92.80 05Nov2017 3 p.m. 52.99 10.90 77.63 94.60 05Nov2017 4 p.m. 52.79 10.10 75.49 52.50 05Nov2017 5 p.m. 52.07 7.50 73.55 20.40 05Nov2017 6 p.m. 52.03 4.10 71.36 0.00 05Nov2017 7 p.m. 39.54 5.10 92.97 0.00 05Nov2017 8 p.m. 50.61 4.50 72.01 0.00 05Nov2017 9 p.m. 47.95 5.50 74.91 0.00 05Nov2017 10 p.m. 45.46 7.00 76.78 0.00 05Nov2017 11 p.m. 43.99 7.30 78.80 0.00 06Nov2017 12 a.m. 43.38 6.30 79.78 0.00 06Nov2017 1 a.m. 42.66 6.70 81.42 0.00 06Nov2017 2 a.m. 43.09 7.30 82.03 0.00 06Nov2017 3 a.m. 43.74 6.60 81.11 0.00 06Nov2017 4 a.m. 43.63 7.70 77.82 0.00 06Nov2017 5 a.m. 42.37 10.70 78.45 0.00 06Nov2017 6 a.m. 41.43 11.70 81.36 0.00 06Nov2017 7 a.m. 40.80 10.90 81.94 0.00 Accuml. Values 1154.15 192.20 1999.87 1046.10 Num. Valid Values 24 24 24 24 Avg. Values 48.09 8.01 83.33 43.59 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 8.94 309.25 83.33 89.94 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1667 definition: xcompl = 1 - (RELH_avg/100) TdC = 6.2651 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 = 0.5397 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4603 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.1253 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 = 1.9119 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.3293 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.040 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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