Detailed Weather Data for Project: HULA

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 17.17 10.40 73.40 0.00 30Dec2017 9 a.m. 15.89 10.90 68.95 8.90 30Dec2017 10 a.m. 14.56 10.70 66.58 57.00 30Dec2017 11 a.m. 14.34 11.10 63.40 117.10 30Dec2017 12 p.m. 15.08 9.40 59.52 166.30 30Dec2017 1 p.m. 16.09 8.40 57.07 200.40 30Dec2017 2 p.m. 17.42 6.90 54.11 187.50 30Dec2017 3 p.m. 19.56 6.70 50.58 157.80 30Dec2017 4 p.m. 21.09 6.80 48.09 110.80 30Dec2017 5 p.m. 21.47 6.80 45.86 37.70 30Dec2017 6 p.m. 19.87 6.00 47.26 0.00 30Dec2017 7 p.m. 10.81 7.30 47.52 0.00 30Dec2017 8 p.m. 18.14 6.00 49.27 0.00 30Dec2017 9 p.m. 17.73 8.40 48.61 0.00 30Dec2017 10 p.m. 16.47 9.30 49.12 0.00 30Dec2017 11 p.m. 15.46 9.00 49.59 0.00 31Dec2017 12 a.m. 14.27 9.90 49.84 0.00 31Dec2017 1 a.m. 12.81 11.20 51.37 0.00 31Dec2017 2 a.m. 11.61 11.90 52.12 0.00 31Dec2017 3 a.m. 10.90 11.50 55.06 0.00 31Dec2017 4 a.m. 10.98 9.70 53.55 0.00 31Dec2017 5 a.m. 10.89 10.40 54.44 0.00 31Dec2017 6 a.m. 10.33 9.90 55.75 0.00 31Dec2017 7 a.m. 9.72 10.90 56.70 0.00 Accuml. Values 362.64 219.50 1307.76 1043.50 Num. Valid Values 24 24 24 24 Avg. Values 15.11 9.15 54.49 43.48 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -9.38 353.18 54.49 89.72 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4551 definition: xcompl = 1 - (RELH_avg/100) TdC = -16.8782 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 = 0.2653 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7347 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.3276 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 = 1.3812 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.9189 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.052 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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