Detailed Weather Data for Project: KAWL

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 43.21 19.80 91.70 0.10 07Nov2017 9 a.m. 43.54 18.70 88.25 48.60 07Nov2017 10 a.m. 44.06 18.90 85.42 58.10 07Nov2017 11 a.m. 44.20 18.70 80.93 83.20 07Nov2017 12 p.m. 44.53 20.30 77.21 195.80 07Nov2017 1 p.m. 44.62 18.80 76.56 143.80 07Nov2017 2 p.m. 45.91 17.50 74.74 136.80 07Nov2017 3 p.m. 46.69 19.40 69.54 144.30 07Nov2017 4 p.m. 47.17 19.80 66.32 97.80 07Nov2017 5 p.m. 47.55 19.40 64.21 28.50 07Nov2017 6 p.m. 46.53 20.80 68.02 0.00 07Nov2017 7 p.m. 49.77 1.10 54.19 0.00 07Nov2017 8 p.m. 44.82 20.40 72.72 0.00 07Nov2017 9 p.m. 45.10 21.30 69.61 0.00 07Nov2017 10 p.m. 44.96 20.50 66.10 0.00 07Nov2017 11 p.m. 44.85 19.90 64.11 0.00 08Nov2017 12 a.m. 44.28 19.80 61.57 0.00 08Nov2017 1 a.m. 43.92 17.10 61.79 0.00 08Nov2017 2 a.m. 43.50 14.00 62.50 0.00 08Nov2017 3 a.m. 42.60 13.30 66.71 0.00 08Nov2017 4 a.m. 41.29 14.60 64.42 0.00 08Nov2017 5 a.m. 40.66 13.70 64.55 0.00 08Nov2017 6 a.m. 39.90 15.70 64.94 0.00 08Nov2017 7 a.m. 39.33 16.60 68.32 0.00 Accuml. Values 1062.98 420.10 1684.43 937.00 Num. Valid Values 24 24 24 24 Avg. Values 44.29 17.50 70.18 39.04 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.83 675.94 70.18 80.56 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2982 definition: xcompl = 1 - (RELH_avg/100) TdC = 1.8198 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 = 0.5083 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4917 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2497 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 = 2.9428 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.1536 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.114 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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