Detailed Weather Data for Project: HULA

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 31.82 7.30 40.31 0.00 05Dec2017 9 a.m. 32.59 8.50 40.40 37.30 05Dec2017 10 a.m. 33.87 10.60 38.92 204.60 05Dec2017 11 a.m. 35.83 11.80 33.99 384.50 05Dec2017 12 p.m. 37.49 11.40 29.38 435.10 05Dec2017 1 p.m. 39.96 9.00 26.73 596.30 05Dec2017 2 p.m. 42.64 8.80 24.36 604.10 05Dec2017 3 p.m. 44.62 8.60 23.15 448.70 05Dec2017 4 p.m. 45.72 9.20 22.79 306.00 05Dec2017 5 p.m. 45.90 8.20 24.48 81.10 05Dec2017 6 p.m. 43.00 7.00 26.83 0.00 05Dec2017 7 p.m. 41.95 4.70 32.11 0.00 05Dec2017 8 p.m. 37.06 3.70 33.21 0.00 05Dec2017 9 p.m. 36.28 7.70 36.67 0.00 05Dec2017 10 p.m. 35.46 5.60 38.38 0.00 05Dec2017 11 p.m. 34.84 6.10 42.68 0.00 06Dec2017 12 a.m. 35.20 7.90 45.30 0.00 06Dec2017 1 a.m. 36.14 7.50 47.79 0.00 06Dec2017 2 a.m. 35.94 6.10 50.46 0.00 06Dec2017 3 a.m. 36.23 5.70 50.81 0.00 06Dec2017 4 a.m. 36.77 6.50 48.58 0.00 06Dec2017 5 a.m. 36.21 7.30 49.28 0.00 06Dec2017 6 a.m. 34.77 6.60 49.87 0.00 06Dec2017 7 a.m. 33.87 6.10 54.95 0.00 Accuml. Values 904.17 181.90 911.43 3097.70 Num. Valid Values 24 24 24 24 Avg. Values 37.67 7.58 37.98 129.07 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.15 292.68 37.98 266.34 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6202 definition: xcompl = 1 - (RELH_avg/100) TdC = -9.9433 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 = 0.4522 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5478 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.5725 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 = 4.8133 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.0574 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.137 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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