Detailed Weather Data for Project: SKIA

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. -901.00 2.54 76.33 13.45 02Dec2017 9 a.m. -901.00 3.68 70.46 164.82 02Dec2017 10 a.m. -901.00 3.32 66.66 332.76 02Dec2017 11 a.m. -901.00 1.57 57.63 470.94 02Dec2017 12 p.m. -901.00 1.57 53.70 547.14 02Dec2017 1 p.m. -901.00 3.18 53.90 566.10 02Dec2017 2 p.m. -901.00 4.16 54.33 510.13 02Dec2017 3 p.m. -901.00 4.20 52.66 406.44 02Dec2017 4 p.m. -901.00 3.35 51.93 227.79 02Dec2017 5 p.m. -901.00 4.06 53.74 60.70 02Dec2017 6 p.m. -901.00 2.28 58.43 0.00 02Dec2017 7 p.m. -901.00 8.11 72.37 0.00 02Dec2017 8 p.m. -901.00 2.64 72.12 0.00 02Dec2017 9 p.m. -901.00 1.40 75.28 0.00 02Dec2017 10 p.m. -901.00 1.15 81.48 0.00 02Dec2017 11 p.m. -901.00 0.68 86.23 0.00 03Dec2017 12 a.m. -901.00 2.47 84.62 0.00 03Dec2017 1 a.m. -901.00 2.94 87.87 0.00 03Dec2017 2 a.m. -901.00 3.59 90.96 0.00 03Dec2017 3 a.m. -901.00 5.52 90.26 0.00 03Dec2017 4 a.m. -901.00 5.47 92.92 0.00 03Dec2017 5 a.m. -901.00 3.00 92.35 0.00 03Dec2017 6 a.m. -901.00 3.50 93.74 0.00 03Dec2017 7 a.m. -901.00 2.59 94.81 0.00 Accuml. Values 0.00 76.97 1764.78 3300.27 Num. Valid Values 0 24 24 24 Avg. Values 3.21 73.53 137.51 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -17.78 123.84 73.53 283.76 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2647 definition: xcompl = 1 - (RELH_avg/100) TdC = -21.3410 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 = 1.2032 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 = 0.4016 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.3491 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.019 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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