Detailed Weather Data for Project: SKIA

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. -901.00 3.61 73.83 0.00 29Dec2017 9 a.m. -901.00 6.68 68.38 13.31 29Dec2017 10 a.m. -901.00 7.76 66.19 35.04 29Dec2017 11 a.m. -901.00 11.03 65.85 72.20 29Dec2017 12 p.m. -901.00 13.67 66.58 128.84 29Dec2017 1 p.m. -901.00 14.62 69.32 145.78 29Dec2017 2 p.m. -901.00 16.68 68.93 343.12 29Dec2017 3 p.m. -901.00 19.33 69.87 392.75 29Dec2017 4 p.m. -901.00 17.71 72.75 122.55 29Dec2017 5 p.m. -901.00 13.62 73.16 15.32 29Dec2017 6 p.m. -901.00 9.65 73.11 0.00 29Dec2017 7 p.m. -901.00 3.46 57.16 0.00 29Dec2017 8 p.m. -901.00 1.59 75.64 0.00 29Dec2017 9 p.m. -901.00 1.73 76.50 0.00 29Dec2017 10 p.m. -901.00 2.33 78.53 0.00 29Dec2017 11 p.m. -901.00 1.87 79.92 0.00 30Dec2017 12 a.m. -901.00 3.25 82.75 0.00 30Dec2017 1 a.m. -901.00 4.32 80.57 0.00 30Dec2017 2 a.m. -901.00 7.06 79.36 0.00 30Dec2017 3 a.m. -901.00 9.19 78.01 0.00 30Dec2017 4 a.m. -901.00 17.16 79.07 0.00 30Dec2017 5 a.m. -901.00 19.13 85.74 0.00 30Dec2017 6 a.m. -901.00 16.53 88.31 0.00 30Dec2017 7 a.m. -901.00 13.79 91.70 0.00 Accuml. Values 0.00 235.77 1801.23 1268.91 Num. Valid Values 0 24 24 24 Avg. Values 9.82 75.05 52.87 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -17.78 379.35 75.05 109.10 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2495 definition: xcompl = 1 - (RELH_avg/100) TdC = -21.1104 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 = -0.2119 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 = 0.3789 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.6470 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.020 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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