Detailed Weather Data for Project: KAWL

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 45.48 14.00 77.67 70.80 03Mar2018 9 a.m. 49.41 17.70 69.04 276.10 03Mar2018 10 a.m. 54.93 20.10 58.94 475.50 03Mar2018 11 a.m. 60.03 21.40 52.16 629.40 03Mar2018 12 p.m. 63.45 19.50 51.63 547.10 03Mar2018 1 p.m. 67.75 22.50 48.49 766.20 03Mar2018 2 p.m. 69.80 21.30 46.73 674.50 03Mar2018 3 p.m. 70.93 20.50 45.92 545.10 03Mar2018 4 p.m. 71.19 20.80 45.39 465.80 03Mar2018 5 p.m. 70.38 19.00 45.15 213.50 03Mar2018 6 p.m. 69.03 18.50 46.08 21.10 03Mar2018 7 p.m. 58.87 15.60 77.51 0.00 03Mar2018 8 p.m. 62.38 13.40 54.95 0.00 03Mar2018 9 p.m. 60.39 12.40 57.87 0.00 03Mar2018 10 p.m. 57.56 8.80 62.42 0.00 03Mar2018 11 p.m. 56.12 9.10 63.98 0.00 04Mar2018 12 a.m. 55.35 9.40 63.75 0.00 04Mar2018 1 a.m. 56.97 16.30 56.73 0.00 04Mar2018 2 a.m. 57.74 18.90 51.68 0.00 04Mar2018 3 a.m. 58.35 20.60 48.95 0.00 04Mar2018 4 a.m. 57.54 16.70 50.00 0.00 04Mar2018 5 a.m. 57.38 16.60 49.65 0.00 04Mar2018 6 a.m. 57.04 17.60 51.26 0.00 04Mar2018 7 a.m. 56.44 17.60 54.18 0.00 Accuml. Values 1444.49 408.30 1330.13 4685.10 Num. Valid Values 24 24 24 24 Avg. Values 60.19 17.01 55.42 195.21 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.66 656.95 55.42 402.82 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4458 definition: xcompl = 1 - (RELH_avg/100) TdC = 6.8032 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 = 0.6332 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3668 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.9707 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 = 7.9105 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 14.3507 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.306 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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