Detailed Weather Data for Project: SKIA

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. -901.00 21.07 84.09 1.33 04Dec2017 9 a.m. -901.00 20.87 83.31 63.92 04Dec2017 10 a.m. -901.00 19.98 80.85 152.34 04Dec2017 11 a.m. -901.00 25.45 75.09 353.08 04Dec2017 12 p.m. -901.00 25.52 68.72 463.68 04Dec2017 1 p.m. -901.00 25.77 62.87 321.57 04Dec2017 2 p.m. -901.00 24.43 60.72 376.33 04Dec2017 3 p.m. -901.00 24.53 52.08 305.34 04Dec2017 4 p.m. -901.00 19.76 45.34 120.59 04Dec2017 5 p.m. -901.00 14.92 37.88 17.00 04Dec2017 6 p.m. -901.00 9.78 39.69 0.00 04Dec2017 7 p.m. -901.00 13.06 39.86 0.00 04Dec2017 8 p.m. -901.00 17.90 30.56 0.00 04Dec2017 9 p.m. -901.00 17.50 37.45 0.00 04Dec2017 10 p.m. -901.00 15.19 37.75 0.00 04Dec2017 11 p.m. -901.00 14.75 38.90 0.00 05Dec2017 12 a.m. -901.00 14.29 42.86 0.00 05Dec2017 1 a.m. -901.00 12.39 45.47 0.00 05Dec2017 2 a.m. -901.00 12.74 47.11 0.00 05Dec2017 3 a.m. -901.00 8.95 49.10 0.00 05Dec2017 4 a.m. -901.00 12.09 43.74 0.00 05Dec2017 5 a.m. -901.00 11.93 38.68 0.00 05Dec2017 6 a.m. -901.00 9.16 39.06 0.00 05Dec2017 7 a.m. -901.00 8.87 39.84 0.00 Accuml. Values 0.00 400.90 1221.02 2175.18 Num. Valid Values 0 24 24 24 Avg. Values 16.70 50.88 90.63 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -17.78 645.05 50.88 187.02 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4912 definition: xcompl = 1 - (RELH_avg/100) TdC = -25.5196 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 = 0.4010 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 = 0.7480 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.7743 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.061 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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