Detailed Weather Data for Project: KEYS

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 67.15 8.92 81.45 6.00 04Dec2017 9 a.m. 68.05 8.41 79.69 58.00 04Dec2017 10 a.m. 70.47 8.39 73.16 143.00 04Dec2017 11 a.m. 73.44 11.46 65.16 339.00 04Dec2017 12 p.m. 75.51 11.09 57.33 325.00 04Dec2017 1 p.m. 76.06 11.53 53.43 376.00 04Dec2017 2 p.m. 75.72 16.91 49.03 153.00 04Dec2017 3 p.m. 74.62 15.73 44.39 156.00 04Dec2017 4 p.m. 67.39 19.02 43.54 130.00 04Dec2017 5 p.m. 64.08 20.90 42.19 33.00 04Dec2017 6 p.m. 63.88 15.19 40.00 2.00 04Dec2017 7 p.m. 42.44 5.54 31.88 0.00 04Dec2017 8 p.m. 58.03 24.12 35.47 0.00 04Dec2017 9 p.m. 53.64 24.33 37.31 1.00 04Dec2017 10 p.m. 51.12 21.03 38.47 0.00 04Dec2017 11 p.m. 47.37 21.39 39.20 0.00 05Dec2017 12 a.m. 45.39 18.44 42.86 0.00 05Dec2017 1 a.m. 43.43 17.24 44.70 0.00 05Dec2017 2 a.m. 42.31 15.24 43.84 0.00 05Dec2017 3 a.m. 40.46 12.35 43.36 0.00 05Dec2017 4 a.m. 39.47 14.38 48.18 0.00 05Dec2017 5 a.m. 35.83 17.67 40.06 0.00 05Dec2017 6 a.m. 35.29 12.87 36.39 0.00 05Dec2017 7 a.m. 35.08 13.51 39.63 0.00 Accuml. Values 1346.23 365.66 1150.72 1722.00 Num. Valid Values 24 24 24 24 Avg. Values 56.09 15.24 47.95 71.75 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.39 588.35 47.95 148.06 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5205 definition: xcompl = 1 - (RELH_avg/100) TdC = 2.5541 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 = 0.6029 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3971 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.6058 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 = 8.0282 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 13.2944 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.222 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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