Detailed Weather Data for Project: HULA

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 46.92 25.20 68.23 70.80 05Mar2018 9 a.m. 47.93 23.50 57.07 346.50 05Mar2018 10 a.m. 49.24 25.80 51.26 572.40 05Mar2018 11 a.m. 49.71 22.70 49.69 755.40 05Mar2018 12 p.m. 52.05 22.70 41.13 872.60 05Mar2018 1 p.m. 54.28 24.60 27.29 931.70 05Mar2018 2 p.m. 55.20 24.50 24.64 902.10 05Mar2018 3 p.m. 55.63 23.60 22.54 792.70 05Mar2018 4 p.m. 55.87 23.30 22.60 620.30 05Mar2018 5 p.m. 55.72 22.60 23.12 399.10 05Mar2018 6 p.m. 55.15 19.70 24.53 152.60 05Mar2018 7 p.m. 39.07 21.50 42.23 3.70 05Mar2018 8 p.m. 50.52 5.90 31.41 0.00 05Mar2018 9 p.m. 47.05 1.80 34.13 0.00 05Mar2018 10 p.m. 45.66 2.30 26.35 0.00 05Mar2018 11 p.m. 43.92 2.40 37.14 0.00 06Mar2018 12 a.m. 41.09 3.50 49.42 0.00 06Mar2018 1 a.m. 39.27 4.30 49.00 0.00 06Mar2018 2 a.m. 39.58 8.10 47.95 0.00 06Mar2018 3 a.m. 39.60 9.00 46.20 0.00 06Mar2018 4 a.m. 38.80 8.90 46.45 0.00 06Mar2018 5 a.m. 39.74 14.00 45.21 0.00 06Mar2018 6 a.m. 42.19 16.20 36.36 0.00 06Mar2018 7 a.m. 41.54 14.80 36.60 0.10 Accuml. Values 1125.75 370.90 940.55 6420.00 Num. Valid Values 24 24 24 24 Avg. Values 46.91 15.45 39.19 267.50 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 8.28 596.78 39.19 551.99 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6081 definition: xcompl = 1 - (RELH_avg/100) TdC = -4.9204 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 = 0.5300 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4700 definition: del_lambda2 = 1 - del_lambda1 Qn = 5.4134 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 = 6.7194 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 11.4979 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.326 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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