Detailed Weather Data for Project: SKIA

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. -901.00 12.24 90.10 0.00 30Dec2017 9 a.m. -901.00 12.22 86.29 0.01 30Dec2017 10 a.m. -901.00 12.79 80.65 18.20 30Dec2017 11 a.m. -901.00 11.79 77.88 51.22 30Dec2017 12 p.m. -901.00 11.90 74.83 94.15 30Dec2017 1 p.m. -901.00 11.49 72.33 113.66 30Dec2017 2 p.m. -901.00 11.50 70.20 113.07 30Dec2017 3 p.m. -901.00 10.11 67.52 75.80 30Dec2017 4 p.m. -901.00 10.06 64.59 48.32 30Dec2017 5 p.m. -901.00 8.72 61.92 6.44 30Dec2017 6 p.m. -901.00 6.10 57.90 0.00 30Dec2017 7 p.m. -901.00 12.50 45.68 0.00 30Dec2017 8 p.m. -901.00 3.21 57.98 0.00 30Dec2017 9 p.m. -901.00 4.89 56.90 0.00 30Dec2017 10 p.m. -901.00 7.57 54.31 0.00 30Dec2017 11 p.m. -901.00 9.31 54.94 0.00 31Dec2017 12 a.m. -901.00 10.64 54.37 0.00 31Dec2017 1 a.m. -901.00 13.30 53.66 0.00 31Dec2017 2 a.m. -901.00 14.96 58.61 0.00 31Dec2017 3 a.m. -901.00 15.56 67.49 0.00 31Dec2017 4 a.m. -901.00 14.32 63.82 0.00 31Dec2017 5 a.m. -901.00 13.48 61.06 0.00 31Dec2017 6 a.m. -901.00 12.85 60.69 0.00 31Dec2017 7 a.m. -901.00 15.05 56.74 0.00 Accuml. Values 0.00 266.56 1550.46 520.87 Num. Valid Values 0 24 24 24 Avg. Values 11.11 64.60 21.70 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -17.78 428.90 64.60 44.78 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3540 definition: xcompl = 1 - (RELH_avg/100) TdC = -22.8053 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 = -0.6953 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 = 0.5366 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.9620 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.027 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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