Detailed Weather Data for Project: KAWL

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 13.42 23.10 72.99 0.00 31Dec2017 9 a.m. 12.29 25.40 71.88 46.40 31Dec2017 10 a.m. 11.97 24.30 72.02 203.20 31Dec2017 11 a.m. 13.48 22.00 62.38 394.30 31Dec2017 12 p.m. 15.82 21.40 53.31 450.00 31Dec2017 1 p.m. 17.42 20.40 48.60 473.10 31Dec2017 2 p.m. 17.65 22.60 49.48 489.20 31Dec2017 3 p.m. 19.11 22.60 51.97 363.30 31Dec2017 4 p.m. 18.90 23.50 54.47 244.80 31Dec2017 5 p.m. 18.25 23.30 56.15 64.80 31Dec2017 6 p.m. 16.61 23.20 58.25 0.40 31Dec2017 7 p.m. 14.50 9.80 45.80 0.00 31Dec2017 8 p.m. 15.01 24.10 62.04 0.00 31Dec2017 9 p.m. 13.80 24.50 64.46 0.00 31Dec2017 10 p.m. 12.74 23.40 67.38 0.00 31Dec2017 11 p.m. 11.53 22.50 68.43 0.00 01Jan2018 12 a.m. 10.02 23.10 70.72 0.00 01Jan2018 1 a.m. 9.18 20.60 74.20 0.00 01Jan2018 2 a.m. 7.83 19.50 76.03 0.00 01Jan2018 3 a.m. 6.46 18.10 75.47 0.00 01Jan2018 4 a.m. 5.72 19.10 78.43 0.00 01Jan2018 5 a.m. 4.98 16.70 78.49 0.00 01Jan2018 6 a.m. 4.68 18.10 81.21 0.00 01Jan2018 7 a.m. 3.65 15.70 81.56 0.00 Accuml. Values 295.01 507.00 1575.72 2729.50 Num. Valid Values 24 24 24 24 Avg. Values 12.29 21.13 65.65 113.73 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -10.95 815.76 65.65 234.68 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3435 definition: xcompl = 1 - (RELH_avg/100) TdC = -16.0938 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 = 0.2443 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7557 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.8744 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 = 0.9165 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.5799 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.085 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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