Detailed Weather Data for Project: SKIA

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. -901.00 6.43 76.21 117.01 07Mar2018 9 a.m. -901.00 8.37 66.92 340.41 07Mar2018 10 a.m. -901.00 10.77 56.69 534.14 07Mar2018 11 a.m. -901.00 10.13 51.98 726.50 07Mar2018 12 p.m. -901.00 10.60 51.63 854.83 07Mar2018 1 p.m. -901.00 12.23 43.43 901.74 07Mar2018 2 p.m. -901.00 11.98 35.39 868.09 07Mar2018 3 p.m. -901.00 12.79 24.91 767.53 07Mar2018 4 p.m. -901.00 11.72 21.72 590.87 07Mar2018 5 p.m. -901.00 9.64 21.38 381.25 07Mar2018 6 p.m. -901.00 9.32 20.88 163.40 07Mar2018 7 p.m. -901.00 7.34 29.28 6.62 07Mar2018 8 p.m. -901.00 1.88 32.42 0.00 07Mar2018 9 p.m. -901.00 5.23 64.45 0.00 07Mar2018 10 p.m. -901.00 6.19 67.30 0.00 07Mar2018 11 p.m. -901.00 5.79 65.31 0.00 08Mar2018 12 a.m. -901.00 7.00 72.71 0.00 08Mar2018 1 a.m. -901.00 5.16 76.10 0.00 08Mar2018 2 a.m. -901.00 1.37 51.18 0.00 08Mar2018 3 a.m. -901.00 3.11 41.06 0.00 08Mar2018 4 a.m. -901.00 4.27 41.58 0.00 08Mar2018 5 a.m. -901.00 4.20 43.87 0.00 08Mar2018 6 a.m. -901.00 3.21 44.99 0.00 08Mar2018 7 a.m. -901.00 2.63 51.92 0.14 Accuml. Values 0.00 171.36 1153.31 6252.53 Num. Valid Values 0 24 24 24 Avg. Values 7.14 48.05 260.52 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -17.78 275.72 48.05 537.59 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5195 definition: xcompl = 1 - (RELH_avg/100) TdC = -26.1636 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 = 3.5262 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 = 0.7916 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.9929 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.055 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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