Detailed Weather Data for Project: SKIA

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. -901.00 13.69 58.22 0.05 31Dec2017 9 a.m. -901.00 14.12 58.09 47.24 31Dec2017 10 a.m. -901.00 16.09 54.06 276.05 31Dec2017 11 a.m. -901.00 14.42 49.57 476.08 31Dec2017 12 p.m. -901.00 15.03 43.58 577.30 31Dec2017 1 p.m. -901.00 15.81 35.14 624.56 31Dec2017 2 p.m. -901.00 14.88 32.02 519.99 31Dec2017 3 p.m. -901.00 15.55 32.46 350.78 31Dec2017 4 p.m. -901.00 16.14 34.29 289.57 31Dec2017 5 p.m. -901.00 14.81 41.18 140.02 31Dec2017 6 p.m. -901.00 12.19 43.88 0.12 31Dec2017 7 p.m. -901.00 4.07 44.14 0.00 31Dec2017 8 p.m. -901.00 13.17 45.98 0.00 31Dec2017 9 p.m. -901.00 13.84 47.75 0.00 31Dec2017 10 p.m. -901.00 13.79 49.53 0.00 31Dec2017 11 p.m. -901.00 12.58 52.15 0.00 01Jan2018 12 a.m. -901.00 10.98 55.10 0.00 01Jan2018 1 a.m. -901.00 8.80 58.38 0.00 01Jan2018 2 a.m. -901.00 8.61 61.57 0.00 01Jan2018 3 a.m. -901.00 9.27 64.02 0.00 01Jan2018 4 a.m. -901.00 7.54 66.50 0.00 01Jan2018 5 a.m. -901.00 8.89 68.21 0.00 01Jan2018 6 a.m. -901.00 7.93 71.16 0.00 01Jan2018 7 a.m. -901.00 7.78 72.52 0.00 Accuml. Values 0.00 289.98 1239.50 3301.76 Num. Valid Values 0 24 24 24 Avg. Values 12.08 51.65 137.57 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -17.78 466.58 51.65 283.89 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4835 definition: xcompl = 1 - (RELH_avg/100) TdC = -25.3495 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 = 0.1635 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.8365 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.2043 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 = 0.7361 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.3541 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.052 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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