Detailed Weather Data for Project: KAWL

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 46.38 22.90 57.56 91.80 05Mar2018 9 a.m. 47.14 20.80 53.77 311.70 05Mar2018 10 a.m. 48.85 24.40 47.87 519.00 05Mar2018 11 a.m. 51.06 30.60 34.08 682.20 05Mar2018 12 p.m. 52.57 28.80 30.34 797.30 05Mar2018 1 p.m. 53.51 28.30 26.96 831.90 05Mar2018 2 p.m. 54.91 24.00 22.34 787.60 05Mar2018 3 p.m. 55.36 22.90 20.43 689.40 05Mar2018 4 p.m. 55.62 21.00 20.35 533.90 05Mar2018 5 p.m. 56.39 18.30 19.76 319.30 05Mar2018 6 p.m. 56.44 17.00 18.61 19.50 05Mar2018 7 p.m. 43.16 26.00 38.91 1.70 05Mar2018 8 p.m. 51.64 5.50 19.80 0.00 05Mar2018 9 p.m. 46.31 3.90 27.33 0.00 05Mar2018 10 p.m. 42.12 4.70 36.21 0.00 05Mar2018 11 p.m. 39.63 5.10 43.03 0.00 06Mar2018 12 a.m. 39.60 5.50 43.81 0.00 06Mar2018 1 a.m. 41.31 8.20 39.76 0.00 06Mar2018 2 a.m. 42.17 9.90 35.17 0.00 06Mar2018 3 a.m. 41.41 10.80 36.35 0.00 06Mar2018 4 a.m. 39.27 12.00 41.70 0.00 06Mar2018 5 a.m. 38.12 12.30 42.94 0.00 06Mar2018 6 a.m. 39.20 9.60 36.03 0.00 06Mar2018 7 a.m. 37.40 8.20 37.87 0.00 Accuml. Values 1119.58 380.70 830.98 5585.30 Num. Valid Values 24 24 24 24 Avg. Values 46.65 15.86 34.62 232.72 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 8.14 612.55 34.62 480.22 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6538 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.6955 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 = 0.5279 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4721 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.4300 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 = 7.1546 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 12.4091 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.323 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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