Detailed Weather Data for Project: SKIA

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. -901.00 9.67 60.06 13.57 06Dec2017 9 a.m. -901.00 9.27 62.17 176.65 06Dec2017 10 a.m. -901.00 5.84 56.16 355.61 06Dec2017 11 a.m. -901.00 6.14 52.03 495.56 06Dec2017 12 p.m. -901.00 8.47 47.22 578.15 06Dec2017 1 p.m. -901.00 9.17 41.22 592.48 06Dec2017 2 p.m. -901.00 10.06 32.54 544.63 06Dec2017 3 p.m. -901.00 11.23 28.86 436.95 06Dec2017 4 p.m. -901.00 10.29 29.30 273.81 06Dec2017 5 p.m. -901.00 10.19 31.14 81.16 06Dec2017 6 p.m. -901.00 7.14 34.54 0.00 06Dec2017 7 p.m. -901.00 5.65 38.36 0.00 06Dec2017 8 p.m. -901.00 5.69 34.58 0.00 06Dec2017 9 p.m. -901.00 3.74 36.17 0.00 06Dec2017 10 p.m. -901.00 2.82 42.67 0.00 06Dec2017 11 p.m. -901.00 5.27 43.17 0.00 07Dec2017 12 a.m. -901.00 12.29 48.23 0.00 07Dec2017 1 a.m. -901.00 8.51 55.24 0.00 07Dec2017 2 a.m. -901.00 10.18 60.31 0.00 07Dec2017 3 a.m. -901.00 11.83 51.62 0.00 07Dec2017 4 a.m. -901.00 13.48 51.27 0.00 07Dec2017 5 a.m. -901.00 14.10 53.75 0.00 07Dec2017 6 a.m. -901.00 12.62 59.29 0.00 07Dec2017 7 a.m. -901.00 9.99 62.58 0.00 Accuml. Values 0.00 213.64 1112.48 3548.57 Num. Valid Values 0 24 24 24 Avg. Values 8.90 46.35 147.86 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -17.78 343.75 46.35 305.11 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5365 definition: xcompl = 1 - (RELH_avg/100) TdC = -26.5682 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 = 1.3864 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 = 0.8178 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.1870 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.048 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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