Detailed Weather Data for Project: HULA

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 33.24 6.10 55.47 16.80 06Dec2017 9 a.m. 34.11 7.40 53.34 200.90 06Dec2017 10 a.m. 37.49 5.50 49.90 399.10 06Dec2017 11 a.m. 41.76 5.10 45.59 545.30 06Dec2017 12 p.m. 46.24 7.50 38.29 620.00 06Dec2017 1 p.m. 49.01 12.30 34.15 634.00 06Dec2017 2 p.m. 50.25 14.40 32.50 576.90 06Dec2017 3 p.m. 50.09 15.60 33.40 425.90 06Dec2017 4 p.m. 49.41 17.60 34.62 292.70 06Dec2017 5 p.m. 48.70 13.10 27.42 86.70 06Dec2017 6 p.m. 46.06 9.50 30.46 0.00 06Dec2017 7 p.m. 27.52 5.00 34.88 0.00 06Dec2017 8 p.m. 40.19 1.40 40.85 0.00 06Dec2017 9 p.m. 38.05 3.90 46.32 0.00 06Dec2017 10 p.m. 36.18 3.80 49.14 0.00 06Dec2017 11 p.m. 34.30 6.70 53.32 0.00 07Dec2017 12 a.m. 33.17 7.70 58.68 0.00 07Dec2017 1 a.m. 31.32 10.70 57.29 0.00 07Dec2017 2 a.m. 29.19 10.60 51.88 0.00 07Dec2017 3 a.m. 26.92 14.40 51.01 0.00 07Dec2017 4 a.m. 24.71 12.10 55.31 0.00 07Dec2017 5 a.m. 23.20 11.00 60.06 0.00 07Dec2017 6 a.m. 21.96 9.60 64.14 0.00 07Dec2017 7 a.m. 20.25 7.80 68.94 0.00 Accuml. Values 873.30 218.80 1126.96 3798.30 Num. Valid Values 24 24 24 24 Avg. Values 36.39 9.12 46.96 158.26 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 2.44 352.05 46.96 326.58 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5304 definition: xcompl = 1 - (RELH_avg/100) TdC = -7.8099 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 = 0.4412 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5588 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.2021 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 = 3.9057 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.7790 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.143 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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