Detailed Weather Data for Project: KEYS

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 14.52 10.09 59.36 5.00 31Dec2017 9 a.m. 13.87 11.92 56.87 72.00 31Dec2017 10 a.m. 14.76 11.66 50.45 237.00 31Dec2017 11 a.m. 15.40 12.04 53.51 476.00 31Dec2017 12 p.m. 16.83 11.77 38.84 576.00 31Dec2017 1 p.m. 17.82 10.16 39.27 557.00 31Dec2017 2 p.m. 19.26 10.90 34.27 115.00 31Dec2017 3 p.m. 19.47 11.51 32.25 125.00 31Dec2017 4 p.m. 19.36 12.34 32.92 205.00 31Dec2017 5 p.m. 17.94 11.36 40.98 95.00 31Dec2017 6 p.m. 16.61 9.40 45.01 4.00 31Dec2017 7 p.m. 13.98 4.27 42.88 1.00 31Dec2017 8 p.m. 14.97 7.54 48.56 0.00 31Dec2017 9 p.m. 13.77 8.85 47.21 0.00 31Dec2017 10 p.m. 12.99 9.01 49.35 1.00 31Dec2017 11 p.m. 11.68 8.20 52.41 0.00 01Jan2018 12 a.m. 10.69 7.44 56.44 0.00 01Jan2018 1 a.m. 9.81 7.06 59.37 0.00 01Jan2018 2 a.m. 8.71 6.06 61.38 0.00 01Jan2018 3 a.m. 7.93 4.82 65.48 0.00 01Jan2018 4 a.m. 6.51 4.89 67.62 1.00 01Jan2018 5 a.m. 5.40 6.11 68.40 0.00 01Jan2018 6 a.m. 4.75 6.88 69.14 0.00 01Jan2018 7 a.m. 3.87 5.27 70.85 0.00 Accuml. Values 310.89 209.55 1242.82 2470.00 Num. Valid Values 24 24 24 24 Avg. Values 12.95 8.73 51.78 102.92 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -10.58 337.17 51.78 212.37 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4822 definition: xcompl = 1 - (RELH_avg/100) TdC = -18.6159 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 = 0.2491 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7509 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.6850 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 = 1.3323 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.7992 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.060 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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