Detailed Weather Data for Project: KEYS

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 49.46 22.05 60.32 115.00 05Mar2018 9 a.m. 50.90 19.52 56.18 356.00 05Mar2018 10 a.m. 51.67 22.76 47.81 560.00 05Mar2018 11 a.m. 52.97 20.96 39.69 717.00 05Mar2018 12 p.m. 54.09 21.04 34.56 809.00 05Mar2018 1 p.m. 55.40 23.25 29.62 847.00 05Mar2018 2 p.m. 56.52 21.40 32.06 820.00 05Mar2018 3 p.m. 57.38 20.78 21.55 703.00 05Mar2018 4 p.m. 57.94 17.84 19.54 488.00 05Mar2018 5 p.m. 57.49 18.07 20.33 353.00 05Mar2018 6 p.m. 57.04 15.14 26.07 117.00 05Mar2018 7 p.m. 45.84 23.93 33.95 7.00 05Mar2018 8 p.m. 51.76 3.34 32.79 0.00 05Mar2018 9 p.m. 49.91 1.26 31.20 0.00 05Mar2018 10 p.m. 45.30 2.52 30.53 0.00 05Mar2018 11 p.m. 44.08 1.68 35.90 0.00 06Mar2018 12 a.m. 44.85 1.66 41.70 0.00 06Mar2018 1 a.m. 44.51 4.11 43.66 0.00 06Mar2018 2 a.m. 41.67 5.32 60.52 0.00 06Mar2018 3 a.m. 40.35 2.97 46.47 0.00 06Mar2018 4 a.m. 41.88 2.31 43.72 0.00 06Mar2018 5 a.m. 40.68 5.28 49.28 1.00 06Mar2018 6 a.m. 40.24 8.22 51.17 0.00 06Mar2018 7 a.m. 39.90 9.52 51.11 3.00 Accuml. Values 1171.83 294.93 939.73 5896.00 Num. Valid Values 24 24 24 24 Avg. Values 48.83 12.29 39.16 245.67 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 9.35 474.54 39.16 506.94 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6084 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.9728 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 = 0.5457 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4543 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.8887 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 = 7.2222 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 10.2324 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.288 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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