Detailed Weather Data for Project: SKIA

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. -901.00 3.67 59.07 0.00 02Jan2018 9 a.m. -901.00 3.44 58.55 27.50 02Jan2018 10 a.m. -901.00 3.18 56.63 125.07 02Jan2018 11 a.m. -901.00 1.75 53.05 217.01 02Jan2018 12 p.m. -901.00 1.12 50.13 233.54 02Jan2018 1 p.m. -901.00 2.24 50.35 205.81 02Jan2018 2 p.m. -901.00 2.46 47.13 292.74 02Jan2018 3 p.m. -901.00 3.58 44.99 478.00 02Jan2018 4 p.m. -901.00 2.34 42.86 172.74 02Jan2018 5 p.m. -901.00 6.06 45.44 30.43 02Jan2018 6 p.m. -901.00 8.60 46.70 0.00 02Jan2018 7 p.m. -901.00 3.98 46.60 0.00 02Jan2018 8 p.m. -901.00 13.57 48.99 0.00 02Jan2018 9 p.m. -901.00 15.23 53.28 0.00 02Jan2018 10 p.m. -901.00 15.81 55.99 0.00 02Jan2018 11 p.m. -901.00 15.69 55.64 0.00 03Jan2018 12 a.m. -901.00 14.91 56.25 0.00 03Jan2018 1 a.m. -901.00 13.66 54.54 0.00 03Jan2018 2 a.m. -901.00 15.79 56.73 0.00 03Jan2018 3 a.m. -901.00 14.30 56.44 0.00 03Jan2018 4 a.m. -901.00 14.69 58.15 0.00 03Jan2018 5 a.m. -901.00 16.60 60.44 0.00 03Jan2018 6 a.m. -901.00 15.43 62.80 0.00 03Jan2018 7 a.m. -901.00 12.77 63.23 0.00 Accuml. Values 0.00 220.87 1283.98 1782.84 Num. Valid Values 0 24 24 24 Avg. Values 9.20 53.50 74.28 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -17.78 355.38 53.50 153.29 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4650 definition: xcompl = 1 - (RELH_avg/100) TdC = -24.9495 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 = 0.1320 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 = 0.7075 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.0698 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.036 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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