Detailed Weather Data for Project: KEYS

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 23.54 4.55 88.19 1.00 30Dec2017 9 a.m. 22.12 8.56 85.20 10.00 30Dec2017 10 a.m. 21.56 9.44 81.29 26.00 30Dec2017 11 a.m. 21.56 7.99 77.81 58.00 30Dec2017 12 p.m. 20.68 8.97 76.16 84.00 30Dec2017 1 p.m. 20.14 9.75 73.65 111.00 30Dec2017 2 p.m. 20.03 9.03 70.36 108.00 30Dec2017 3 p.m. 20.35 7.55 68.58 84.00 30Dec2017 4 p.m. 21.13 6.88 66.64 49.00 30Dec2017 5 p.m. 20.89 6.92 65.35 20.00 30Dec2017 6 p.m. 21.45 4.05 62.54 1.00 30Dec2017 7 p.m. 15.51 9.85 47.45 0.00 30Dec2017 8 p.m. 22.66 2.46 56.43 0.00 30Dec2017 9 p.m. 23.22 2.17 56.38 0.00 30Dec2017 10 p.m. 23.43 2.03 57.35 0.00 30Dec2017 11 p.m. 23.88 1.66 57.78 0.00 31Dec2017 12 a.m. 22.87 6.76 55.15 1.00 31Dec2017 1 a.m. 20.80 8.49 57.17 0.00 31Dec2017 2 a.m. 18.61 9.90 65.05 0.00 31Dec2017 3 a.m. 15.64 9.80 75.37 0.00 31Dec2017 4 a.m. 14.74 9.78 68.83 0.00 31Dec2017 5 a.m. 14.76 9.52 60.04 0.00 31Dec2017 6 a.m. 14.76 9.46 63.10 0.00 31Dec2017 7 a.m. 14.97 9.05 58.51 0.00 Accuml. Values 479.30 174.62 1594.38 553.00 Num. Valid Values 24 24 24 24 Avg. Values 19.97 7.28 66.43 23.04 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -6.68 280.96 66.43 47.55 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3357 definition: xcompl = 1 - (RELH_avg/100) TdC = -11.8697 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 = 0.3032 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6968 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.6500 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 = 1.2509 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.5036 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.033 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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