Detailed Weather Data for Project: KEYS

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 34.43 3.46 61.38 3.00 29Dec2017 9 a.m. 35.19 5.77 61.26 28.00 29Dec2017 10 a.m. 36.41 5.60 62.48 52.00 29Dec2017 11 a.m. 37.83 6.35 60.22 77.00 29Dec2017 12 p.m. 38.82 6.49 61.62 124.00 29Dec2017 1 p.m. 40.24 7.65 61.81 165.00 29Dec2017 2 p.m. 41.58 7.24 62.23 197.00 29Dec2017 3 p.m. 41.68 8.37 66.21 165.00 29Dec2017 4 p.m. 42.12 6.85 66.02 95.00 29Dec2017 5 p.m. 42.57 6.51 67.24 33.00 29Dec2017 6 p.m. 43.02 4.92 68.65 2.00 29Dec2017 7 p.m. 21.88 3.32 58.14 0.00 29Dec2017 8 p.m. 42.33 1.76 67.79 1.00 29Dec2017 9 p.m. 42.12 1.26 73.04 0.00 29Dec2017 10 p.m. 40.80 2.17 74.14 0.00 29Dec2017 11 p.m. 40.35 2.17 78.22 0.00 30Dec2017 12 a.m. 40.14 2.53 76.77 0.00 30Dec2017 1 a.m. 40.14 2.37 74.26 0.00 30Dec2017 2 a.m. 39.81 2.31 76.28 0.00 30Dec2017 3 a.m. 39.69 4.37 73.28 0.00 30Dec2017 4 a.m. 34.54 7.69 77.50 1.00 30Dec2017 5 a.m. 29.59 17.46 82.75 1.00 30Dec2017 6 a.m. 26.83 15.39 83.55 0.00 30Dec2017 7 a.m. 25.74 8.76 85.93 0.00 Accuml. Values 897.83 140.77 1680.77 944.00 Num. Valid Values 24 24 24 24 Avg. Values 37.41 5.87 70.03 39.33 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.01 226.50 70.03 81.17 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2997 definition: xcompl = 1 - (RELH_avg/100) TdC = -1.8888 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 = 0.4499 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5501 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2903 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 = 2.2718 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.2170 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.043 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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