Detailed Weather Data for Project: SKIA

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. -901.00 9.56 96.09 2.38 07Nov2017 9 a.m. -901.00 11.73 93.37 22.69 07Nov2017 10 a.m. -901.00 10.60 91.90 45.02 07Nov2017 11 a.m. -901.00 10.94 89.75 65.25 07Nov2017 12 p.m. -901.00 11.00 87.61 54.56 07Nov2017 1 p.m. -901.00 11.88 91.11 71.06 07Nov2017 2 p.m. -901.00 10.32 89.90 50.27 07Nov2017 3 p.m. -901.00 10.86 82.38 61.89 07Nov2017 4 p.m. -901.00 10.32 76.99 33.17 07Nov2017 5 p.m. -901.00 10.61 70.83 1.91 07Nov2017 6 p.m. -901.00 10.81 71.61 0.00 07Nov2017 7 p.m. -901.00 2.63 50.75 0.00 07Nov2017 8 p.m. -901.00 13.27 76.50 0.00 07Nov2017 9 p.m. -901.00 11.63 76.47 0.00 07Nov2017 10 p.m. -901.00 8.51 74.17 0.00 07Nov2017 11 p.m. -901.00 10.07 70.56 0.00 08Nov2017 12 a.m. -901.00 10.91 68.66 0.00 08Nov2017 1 a.m. -901.00 10.51 67.57 0.00 08Nov2017 2 a.m. -901.00 9.66 68.19 0.00 08Nov2017 3 a.m. -901.00 8.08 68.97 0.00 08Nov2017 4 a.m. -901.00 6.17 70.21 0.00 08Nov2017 5 a.m. -901.00 6.03 70.69 0.00 08Nov2017 6 a.m. -901.00 8.62 68.98 0.00 08Nov2017 7 a.m. -901.00 7.95 68.10 0.00 Accuml. Values 0.00 232.67 1841.36 408.20 Num. Valid Values 0 24 24 24 Avg. Values 9.69 76.72 17.01 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -17.78 374.37 76.72 35.10 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2328 definition: xcompl = 1 - (RELH_avg/100) TdC = -20.8619 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 = -0.7664 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 = 0.3539 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.6036 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.015 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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