Detailed Weather Data for Project: SKIA

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. -901.00 5.45 53.93 1.35 04Mar2018 9 a.m. -901.00 5.60 54.25 29.04 04Mar2018 10 a.m. -901.00 8.57 53.62 139.82 04Mar2018 11 a.m. -901.00 9.07 54.03 116.50 04Mar2018 12 p.m. -901.00 9.85 55.15 163.98 04Mar2018 1 p.m. -901.00 13.13 55.45 273.24 04Mar2018 2 p.m. -901.00 14.83 58.42 126.58 04Mar2018 3 p.m. -901.00 12.74 66.40 55.60 04Mar2018 4 p.m. -901.00 13.33 71.08 118.23 04Mar2018 5 p.m. -901.00 13.51 78.36 80.72 04Mar2018 6 p.m. -901.00 11.19 77.52 19.62 04Mar2018 7 p.m. -901.00 6.29 17.72 2.07 04Mar2018 8 p.m. -901.00 7.87 80.23 0.00 04Mar2018 9 p.m. -901.00 13.83 85.94 0.00 04Mar2018 10 p.m. -901.00 12.40 84.92 0.00 04Mar2018 11 p.m. -901.00 15.40 84.11 0.00 05Mar2018 12 a.m. -901.00 15.72 82.11 0.00 05Mar2018 1 a.m. -901.00 13.84 80.34 0.00 05Mar2018 2 a.m. -901.00 11.44 80.72 0.00 05Mar2018 3 a.m. -901.00 14.87 83.62 0.00 05Mar2018 4 a.m. -901.00 17.10 86.56 0.00 05Mar2018 5 a.m. -901.00 18.57 88.74 0.00 05Mar2018 6 a.m. -901.00 18.79 90.06 0.00 05Mar2018 7 a.m. -901.00 21.84 86.18 0.00 Accuml. Values 0.00 305.23 1709.46 1126.75 Num. Valid Values 0 24 24 24 Avg. Values 12.72 71.23 46.95 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -17.78 491.12 71.23 96.88 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2877 definition: xcompl = 1 - (RELH_avg/100) TdC = -21.7004 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 = -0.3053 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 = 0.4362 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.8887 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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