Detailed Weather Data for Project: HULA

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 23.11 4.80 79.53 0.00 29Dec2017 9 a.m. 25.39 4.90 77.14 4.00 29Dec2017 10 a.m. 27.50 7.50 73.19 66.00 29Dec2017 11 a.m. 31.53 7.20 65.71 136.10 29Dec2017 12 p.m. 34.50 9.00 63.17 183.30 29Dec2017 1 p.m. 37.04 10.40 61.72 212.30 29Dec2017 2 p.m. 39.20 12.10 60.19 295.50 29Dec2017 3 p.m. 39.96 12.30 61.20 257.50 29Dec2017 4 p.m. 39.07 11.40 66.22 87.90 29Dec2017 5 p.m. 37.67 10.70 72.29 6.30 29Dec2017 6 p.m. 37.44 5.80 74.66 0.00 29Dec2017 7 p.m. 18.46 5.80 49.63 0.00 29Dec2017 8 p.m. 37.00 1.70 76.21 0.00 29Dec2017 9 p.m. 36.79 2.70 76.98 0.00 29Dec2017 10 p.m. 36.72 2.00 77.02 0.00 29Dec2017 11 p.m. 36.10 0.90 79.44 0.00 30Dec2017 12 a.m. 34.77 2.20 86.58 0.00 30Dec2017 1 a.m. 35.11 2.70 81.06 0.00 30Dec2017 2 a.m. 35.24 7.90 76.92 0.00 30Dec2017 3 a.m. 27.59 15.90 83.18 0.00 30Dec2017 4 a.m. 23.07 16.30 87.53 0.00 30Dec2017 5 a.m. 20.98 10.60 89.84 0.00 30Dec2017 6 a.m. 19.53 10.90 86.18 0.00 30Dec2017 7 a.m. 18.01 10.70 78.75 0.00 Accuml. Values 751.80 186.40 1784.34 1248.90 Num. Valid Values 24 24 24 24 Avg. Values 31.32 7.77 74.35 52.04 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -0.38 299.92 74.35 107.38 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2565 definition: xcompl = 1 - (RELH_avg/100) TdC = -4.3594 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 = 0.3978 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6022 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.0912 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 = 1.5297 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.8748 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.043 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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