Detailed Weather Data for Project: HULA

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 39.69 2.00 99.17 0.90 03Dec2017 9 a.m. 41.81 3.00 98.75 142.60 03Dec2017 10 a.m. 52.32 6.90 87.01 325.10 03Dec2017 11 a.m. 58.82 7.30 74.87 394.60 03Dec2017 12 p.m. 63.27 8.50 64.25 596.00 03Dec2017 1 p.m. 66.22 9.00 55.87 577.30 03Dec2017 2 p.m. 66.25 9.90 54.48 437.20 03Dec2017 3 p.m. 66.76 9.30 57.80 359.90 03Dec2017 4 p.m. 67.28 8.80 60.16 159.80 03Dec2017 5 p.m. 65.77 7.50 63.70 31.40 03Dec2017 6 p.m. 65.10 7.70 64.77 0.00 03Dec2017 7 p.m. 57.49 23.20 30.08 0.00 03Dec2017 8 p.m. 63.79 11.70 72.07 0.00 03Dec2017 9 p.m. 63.01 12.20 75.09 0.00 03Dec2017 10 p.m. 62.69 11.50 73.77 0.00 03Dec2017 11 p.m. 62.47 11.00 73.18 0.00 04Dec2017 12 a.m. 63.54 10.90 73.24 0.00 04Dec2017 1 a.m. 62.56 9.80 76.14 0.00 04Dec2017 2 a.m. 61.92 9.20 76.63 0.00 04Dec2017 3 a.m. 62.37 10.50 75.06 0.00 04Dec2017 4 a.m. 63.70 13.90 73.31 0.00 04Dec2017 5 a.m. 63.12 13.40 76.92 0.00 04Dec2017 6 a.m. 63.32 12.20 78.74 0.00 04Dec2017 7 a.m. 63.82 11.30 80.24 0.00 Accuml. Values 1467.08 240.70 1715.30 3024.80 Num. Valid Values 24 24 24 24 Avg. Values 61.13 10.03 71.47 126.03 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 16.18 387.29 71.47 260.07 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2853 definition: xcompl = 1 - (RELH_avg/100) TdC = 11.0908 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 = 0.6400 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3600 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.0893 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 = 5.1887 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.5713 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.146 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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