Detailed Weather Data for Project: SKIA

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. -901.00 8.61 67.69 5.31 08Nov2017 9 a.m. -901.00 10.30 66.64 73.42 08Nov2017 10 a.m. -901.00 10.53 64.68 221.76 08Nov2017 11 a.m. -901.00 8.19 62.24 302.01 08Nov2017 12 p.m. -901.00 7.65 56.57 533.82 08Nov2017 1 p.m. -901.00 9.98 49.40 661.49 08Nov2017 2 p.m. -901.00 7.13 44.91 612.80 08Nov2017 3 p.m. -901.00 6.02 40.93 490.55 08Nov2017 4 p.m. -901.00 7.57 36.40 321.30 08Nov2017 5 p.m. -901.00 5.44 36.73 123.42 08Nov2017 6 p.m. -901.00 2.64 41.54 1.45 08Nov2017 7 p.m. -901.00 2.25 55.38 0.00 08Nov2017 8 p.m. -901.00 1.96 53.59 0.00 08Nov2017 9 p.m. -901.00 2.35 54.47 0.00 08Nov2017 10 p.m. -901.00 3.11 56.48 0.00 08Nov2017 11 p.m. -901.00 3.12 68.99 0.00 09Nov2017 12 a.m. -901.00 2.83 83.27 0.00 09Nov2017 1 a.m. -901.00 2.31 85.96 0.00 09Nov2017 2 a.m. -901.00 2.79 90.10 0.00 09Nov2017 3 a.m. -901.00 2.70 93.98 0.00 09Nov2017 4 a.m. -901.00 4.08 94.85 0.00 09Nov2017 5 a.m. -901.00 3.92 97.93 0.00 09Nov2017 6 a.m. -901.00 5.04 95.48 0.00 09Nov2017 7 a.m. -901.00 3.59 97.88 0.00 Accuml. Values 0.00 124.11 1596.09 3347.33 Num. Valid Values 0 24 24 24 Avg. Values 5.17 66.50 139.47 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -17.78 199.69 66.50 287.80 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3350 definition: xcompl = 1 - (RELH_avg/100) TdC = -22.4765 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 = 1.2378 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 = 0.5076 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.5502 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.026 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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