Detailed Weather Data for Project: HULA

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. 34.77 3.90 68.91 10.70 08Nov2017 9 a.m. 36.43 4.30 65.32 180.40 08Nov2017 10 a.m. 40.71 6.10 57.14 443.70 08Nov2017 11 a.m. 43.70 5.70 52.81 620.40 08Nov2017 12 p.m. 47.35 5.90 47.75 698.50 08Nov2017 1 p.m. 48.83 7.60 43.48 706.70 08Nov2017 2 p.m. 50.70 8.10 39.63 637.30 08Nov2017 3 p.m. 52.03 6.70 35.12 507.90 08Nov2017 4 p.m. 52.45 7.10 33.35 322.60 08Nov2017 5 p.m. 51.91 4.30 34.62 119.10 08Nov2017 6 p.m. 49.01 3.10 40.43 0.90 08Nov2017 7 p.m. 50.86 5.60 48.70 0.00 08Nov2017 8 p.m. 42.48 1.20 59.67 0.00 08Nov2017 9 p.m. 40.59 1.80 63.47 0.00 08Nov2017 10 p.m. 38.03 1.30 78.25 0.00 08Nov2017 11 p.m. 35.24 1.00 86.55 0.00 09Nov2017 12 a.m. 33.87 0.50 93.66 0.00 09Nov2017 1 a.m. 32.56 0.90 95.99 0.00 09Nov2017 2 a.m. 31.17 1.60 97.59 0.00 09Nov2017 3 a.m. 32.16 2.20 98.35 0.00 09Nov2017 4 a.m. 31.50 1.50 97.42 0.00 09Nov2017 5 a.m. 30.51 1.10 98.50 0.00 09Nov2017 6 a.m. 30.87 2.70 97.04 0.00 09Nov2017 7 a.m. 28.81 0.50 98.22 0.00 Accuml. Values 966.54 84.70 1631.97 4248.20 Num. Valid Values 24 24 24 24 Avg. Values 40.27 3.53 68.00 177.01 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.60 136.28 68.00 365.26 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3200 definition: xcompl = 1 - (RELH_avg/100) TdC = -0.7601 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 = 0.4744 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5256 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.7547 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 = 2.7111 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.9608 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.092 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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