Detailed Weather Data for Project: KEYS

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 42.66 8.03 93.19 11.00 07Nov2017 9 a.m. 42.89 8.60 91.67 38.00 07Nov2017 10 a.m. 43.32 7.70 89.46 51.00 07Nov2017 11 a.m. 43.66 6.70 87.94 78.00 07Nov2017 12 p.m. 43.97 9.01 88.73 85.00 07Nov2017 1 p.m. 43.65 10.06 91.72 72.00 07Nov2017 2 p.m. 43.86 11.10 88.85 74.00 07Nov2017 3 p.m. 44.74 10.43 82.68 50.00 07Nov2017 4 p.m. 45.97 6.79 78.60 37.00 07Nov2017 5 p.m. 47.05 7.41 68.58 16.00 07Nov2017 6 p.m. 47.05 10.50 67.78 1.00 07Nov2017 7 p.m. 47.26 1.98 53.73 0.00 07Nov2017 8 p.m. 45.30 9.87 74.20 0.00 07Nov2017 9 p.m. 44.64 8.89 74.62 0.00 07Nov2017 10 p.m. 44.08 9.01 73.34 0.00 07Nov2017 11 p.m. 44.31 7.93 68.89 0.00 08Nov2017 12 a.m. 44.08 9.47 65.71 0.00 08Nov2017 1 a.m. 44.31 7.89 64.80 0.00 08Nov2017 2 a.m. 43.88 6.88 65.41 0.00 08Nov2017 3 a.m. 44.08 4.91 66.13 0.00 08Nov2017 4 a.m. 44.20 3.11 67.55 0.00 08Nov2017 5 a.m. 43.86 3.88 67.97 0.00 08Nov2017 6 a.m. 43.32 7.08 67.78 0.00 08Nov2017 7 a.m. 41.88 5.74 67.05 0.00 Accuml. Values 1064.03 182.97 1806.38 513.00 Num. Valid Values 24 24 24 24 Avg. Values 44.33 7.62 75.27 21.38 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.85 294.40 75.27 44.11 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2473 definition: xcompl = 1 - (RELH_avg/100) TdC = 2.8102 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 = 0.5087 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4913 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.6044 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 = 2.4473 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.7998 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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