Detailed Weather Data for Project: SKIA

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. -901.00 3.59 97.65 5.25 03Dec2017 9 a.m. -901.00 4.48 98.09 61.79 03Dec2017 10 a.m. -901.00 4.11 95.95 82.97 03Dec2017 11 a.m. -901.00 3.79 92.87 180.40 03Dec2017 12 p.m. -901.00 7.56 81.07 235.97 03Dec2017 1 p.m. -901.00 10.88 73.74 310.12 03Dec2017 2 p.m. -901.00 10.93 72.26 357.29 03Dec2017 3 p.m. -901.00 12.74 64.30 343.29 03Dec2017 4 p.m. -901.00 12.75 60.52 144.03 03Dec2017 5 p.m. -901.00 12.68 62.63 40.66 03Dec2017 6 p.m. -901.00 7.60 67.92 0.00 03Dec2017 7 p.m. -901.00 15.42 24.96 0.00 03Dec2017 8 p.m. -901.00 10.32 72.34 0.00 03Dec2017 9 p.m. -901.00 11.13 73.01 0.00 03Dec2017 10 p.m. -901.00 14.21 73.00 0.00 03Dec2017 11 p.m. -901.00 14.42 74.46 0.00 04Dec2017 12 a.m. -901.00 11.65 78.09 0.00 04Dec2017 1 a.m. -901.00 10.58 77.21 0.00 04Dec2017 2 a.m. -901.00 12.39 73.14 0.00 04Dec2017 3 a.m. -901.00 16.53 74.06 0.00 04Dec2017 4 a.m. -901.00 18.54 78.62 0.00 04Dec2017 5 a.m. -901.00 19.73 81.64 0.00 04Dec2017 6 a.m. -901.00 20.64 83.21 0.00 04Dec2017 7 a.m. -901.00 19.55 83.84 0.00 Accuml. Values 0.00 286.22 1814.58 1761.77 Num. Valid Values 0 24 24 24 Avg. Values 11.93 75.61 73.41 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -17.78 460.53 75.61 151.48 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2439 definition: xcompl = 1 - (RELH_avg/100) TdC = -21.0271 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 = 0.1177 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 = 0.3705 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.7328 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.025 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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