Detailed Weather Data for Project: SKIA

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. -901.00 19.60 69.01 86.28 05Mar2018 9 a.m. -901.00 15.19 51.72 324.12 05Mar2018 10 a.m. -901.00 15.90 40.92 542.27 05Mar2018 11 a.m. -901.00 16.11 38.86 719.58 05Mar2018 12 p.m. -901.00 15.41 31.24 834.49 05Mar2018 1 p.m. -901.00 16.30 22.27 892.79 05Mar2018 2 p.m. -901.00 16.65 19.18 824.01 05Mar2018 3 p.m. -901.00 14.51 16.95 768.28 05Mar2018 4 p.m. -901.00 14.31 15.50 602.01 05Mar2018 5 p.m. -901.00 15.32 15.55 387.05 05Mar2018 6 p.m. -901.00 11.74 16.03 153.17 05Mar2018 7 p.m. -901.00 20.15 35.31 0.66 05Mar2018 8 p.m. -901.00 3.85 19.79 0.00 05Mar2018 9 p.m. -901.00 2.85 33.97 0.00 05Mar2018 10 p.m. -901.00 4.64 56.00 0.00 05Mar2018 11 p.m. -901.00 7.22 68.46 0.00 06Mar2018 12 a.m. -901.00 6.95 55.86 0.00 06Mar2018 1 a.m. -901.00 8.20 47.08 0.00 06Mar2018 2 a.m. -901.00 9.10 41.36 0.00 06Mar2018 3 a.m. -901.00 9.01 45.83 0.00 06Mar2018 4 a.m. -901.00 5.05 38.20 0.00 06Mar2018 5 a.m. -901.00 7.08 40.94 0.00 06Mar2018 6 a.m. -901.00 10.18 47.19 0.00 06Mar2018 7 a.m. -901.00 11.94 44.29 0.00 Accuml. Values 0.00 277.26 911.51 6134.71 Num. Valid Values 0 24 24 24 Avg. Values 11.55 37.98 255.61 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -17.78 446.11 37.98 527.46 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6202 definition: xcompl = 1 - (RELH_avg/100) TdC = -28.7602 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 = 3.4274 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 = 0.9451 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.6306 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.076 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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