Detailed Weather Data for Project: HULA

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 43.66 9.60 71.13 91.20 03Mar2018 9 a.m. 47.66 9.30 66.08 322.20 03Mar2018 10 a.m. 52.61 9.80 59.08 541.70 03Mar2018 11 a.m. 57.38 10.00 52.48 778.40 03Mar2018 12 p.m. 60.80 10.20 48.21 831.70 03Mar2018 1 p.m. 63.45 10.70 46.97 870.80 03Mar2018 2 p.m. 64.76 11.60 46.49 838.60 03Mar2018 3 p.m. 66.40 11.00 45.25 718.50 03Mar2018 4 p.m. 66.52 13.40 44.61 567.30 03Mar2018 5 p.m. 65.95 13.70 45.02 352.70 03Mar2018 6 p.m. 64.87 12.00 46.07 122.10 03Mar2018 7 p.m. 53.74 11.30 74.46 0.00 03Mar2018 8 p.m. 59.72 11.70 51.47 0.00 03Mar2018 9 p.m. 59.09 12.40 50.60 0.00 03Mar2018 10 p.m. 57.60 11.20 51.21 0.00 03Mar2018 11 p.m. 55.63 9.40 53.02 0.00 04Mar2018 12 a.m. 54.16 9.20 53.89 0.00 04Mar2018 1 a.m. 53.15 10.60 52.97 0.00 04Mar2018 2 a.m. 52.27 11.60 51.57 0.00 04Mar2018 3 a.m. 51.35 9.70 54.72 0.00 04Mar2018 4 a.m. 52.32 9.00 54.01 0.00 04Mar2018 5 a.m. 50.83 8.40 56.54 0.00 04Mar2018 6 a.m. 52.05 10.50 53.53 0.00 04Mar2018 7 a.m. 52.43 11.20 53.51 0.00 Accuml. Values 1358.40 257.50 1282.89 6035.20 Num. Valid Values 24 24 24 24 Avg. Values 56.60 10.73 53.45 251.47 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.67 414.32 53.45 518.91 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4655 definition: xcompl = 1 - (RELH_avg/100) TdC = 4.4050 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 = 0.6067 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3933 definition: del_lambda2 = 1 - del_lambda1 Qn = 5.4450 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 = 7.2834 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 9.3063 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.274 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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