Detailed Weather Data for Project: HULA

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 64.31 11.60 80.30 0.30 04Dec2017 9 a.m. 65.59 13.30 78.30 44.00 04Dec2017 10 a.m. 67.80 17.50 73.04 252.00 04Dec2017 11 a.m. 69.85 19.50 66.60 314.70 04Dec2017 12 p.m. 71.91 18.50 60.10 378.50 04Dec2017 1 p.m. 73.89 18.40 52.60 397.40 04Dec2017 2 p.m. 73.20 21.40 47.07 266.10 04Dec2017 3 p.m. 67.73 17.80 52.79 256.30 04Dec2017 4 p.m. 64.47 23.60 41.28 156.30 04Dec2017 5 p.m. 61.88 17.10 39.67 59.60 04Dec2017 6 p.m. 60.22 15.50 37.76 0.00 04Dec2017 7 p.m. 38.59 4.80 30.78 0.00 04Dec2017 8 p.m. 52.25 22.40 38.99 0.00 04Dec2017 9 p.m. 48.51 20.80 38.92 0.00 04Dec2017 10 p.m. 44.74 20.50 39.41 0.00 04Dec2017 11 p.m. 41.86 16.90 44.07 0.00 05Dec2017 12 a.m. 39.92 14.70 45.09 0.00 05Dec2017 1 a.m. 38.16 12.00 47.28 0.00 05Dec2017 2 a.m. 36.16 11.90 45.64 0.00 05Dec2017 3 a.m. 33.71 12.30 40.94 0.00 05Dec2017 4 a.m. 31.86 11.90 38.90 0.00 05Dec2017 5 a.m. 31.42 10.40 39.24 0.00 05Dec2017 6 a.m. 31.21 8.60 39.99 0.00 05Dec2017 7 a.m. 31.59 8.50 39.98 0.00 Accuml. Values 1240.82 369.90 1158.74 2125.20 Num. Valid Values 24 24 24 24 Avg. Values 51.70 15.41 48.28 88.55 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 10.94 595.17 48.28 182.72 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5172 definition: xcompl = 1 - (RELH_avg/100) TdC = 0.4064 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 = 0.5688 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4312 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.9283 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 = 6.8018 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 11.5968 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.218 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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