Detailed Weather Data for Project: KEYS

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 13.64 2.51 61.38 2.00 02Jan2018 9 a.m. 14.41 2.10 60.47 32.00 02Jan2018 10 a.m. 15.85 2.30 59.31 75.00 02Jan2018 11 a.m. 18.61 1.21 54.85 131.00 02Jan2018 12 p.m. 18.61 0.86 56.63 226.00 02Jan2018 1 p.m. 20.80 0.89 56.44 213.00 02Jan2018 2 p.m. 21.45 3.40 51.67 182.00 02Jan2018 3 p.m. 23.32 4.69 48.50 102.00 02Jan2018 4 p.m. 23.77 2.46 44.95 118.00 02Jan2018 5 p.m. 23.99 4.22 47.15 26.00 02Jan2018 6 p.m. 23.88 6.53 46.05 2.00 02Jan2018 7 p.m. 34.88 7.30 53.57 0.00 02Jan2018 8 p.m. 22.78 5.99 48.74 0.00 02Jan2018 9 p.m. 21.90 6.19 52.16 0.00 02Jan2018 10 p.m. 21.24 9.11 53.14 0.00 02Jan2018 11 p.m. 20.14 8.60 56.44 0.00 03Jan2018 12 a.m. 20.14 7.63 58.76 0.00 03Jan2018 1 a.m. 20.14 7.43 56.74 0.00 03Jan2018 2 a.m. 19.81 7.15 60.77 0.00 03Jan2018 3 a.m. 19.36 9.14 55.16 0.00 03Jan2018 4 a.m. 18.93 4.78 55.64 0.00 03Jan2018 5 a.m. 19.36 5.62 57.60 0.00 03Jan2018 6 a.m. 20.14 8.45 59.61 0.00 03Jan2018 7 a.m. 19.15 12.69 66.33 0.00 Accuml. Values 496.33 131.25 1322.06 1109.00 Num. Valid Values 24 24 24 24 Avg. Values 20.68 5.47 55.09 46.21 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -6.29 211.18 55.09 95.35 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4491 definition: xcompl = 1 - (RELH_avg/100) TdC = -13.8442 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 = 0.3089 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6911 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2589 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 = 1.7331 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.6751 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.042 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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