Detailed Weather Data for Project: SKIA

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. -901.00 7.70 40.17 0.00 05Dec2017 9 a.m. -901.00 6.44 39.88 8.94 05Dec2017 10 a.m. -901.00 7.11 37.52 45.59 05Dec2017 11 a.m. -901.00 7.50 35.53 186.10 05Dec2017 12 p.m. -901.00 8.69 29.12 415.57 05Dec2017 1 p.m. -901.00 8.34 24.84 437.28 05Dec2017 2 p.m. -901.00 6.31 23.85 315.54 05Dec2017 3 p.m. -901.00 8.33 24.32 304.03 05Dec2017 4 p.m. -901.00 7.86 24.43 239.96 05Dec2017 5 p.m. -901.00 10.84 27.52 63.05 05Dec2017 6 p.m. -901.00 12.62 32.40 0.00 05Dec2017 7 p.m. -901.00 5.72 36.44 0.00 05Dec2017 8 p.m. -901.00 11.71 44.32 0.00 05Dec2017 9 p.m. -901.00 9.79 47.18 0.00 05Dec2017 10 p.m. -901.00 10.29 50.07 0.00 05Dec2017 11 p.m. -901.00 11.35 47.47 0.00 06Dec2017 12 a.m. -901.00 12.24 45.69 0.00 06Dec2017 1 a.m. -901.00 15.24 46.56 0.00 06Dec2017 2 a.m. -901.00 15.56 48.47 0.00 06Dec2017 3 a.m. -901.00 16.48 50.69 0.00 06Dec2017 4 a.m. -901.00 16.75 52.97 0.00 06Dec2017 5 a.m. -901.00 17.44 55.48 0.00 06Dec2017 6 a.m. -901.00 14.39 55.13 0.00 06Dec2017 7 a.m. -901.00 12.84 58.24 0.00 Accuml. Values 0.00 261.54 978.29 2016.06 Num. Valid Values 0 24 24 24 Avg. Values 10.90 40.76 84.00 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -17.78 420.82 40.76 173.34 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5924 definition: xcompl = 1 - (RELH_avg/100) TdC = -27.9921 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 = 0.2912 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 = 0.9032 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.4998 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.051 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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