Detailed Weather Data for Project: GSAL

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 35.38 5.10 76.46 21.00 07Nov2017 9 a.m. 37.38 7.50 74.88 54.40 07Nov2017 10 a.m. 40.24 10.00 72.00 59.50 07Nov2017 11 a.m. 41.52 12.70 66.78 170.10 07Nov2017 12 p.m. 43.92 13.90 60.70 356.30 07Nov2017 1 p.m. 45.37 13.70 59.01 349.80 07Nov2017 2 p.m. 46.20 13.10 56.12 271.90 07Nov2017 3 p.m. 45.88 13.00 55.64 153.60 07Nov2017 4 p.m. 45.75 12.80 53.62 78.60 07Nov2017 5 p.m. 44.53 12.70 49.97 22.60 07Nov2017 6 p.m. 43.38 13.40 51.35 0.00 07Nov2017 7 p.m. 45.05 1.50 51.58 0.00 07Nov2017 8 p.m. 40.84 5.90 58.97 0.00 07Nov2017 9 p.m. 41.45 6.50 56.14 0.00 07Nov2017 10 p.m. 42.21 7.50 50.09 0.00 07Nov2017 11 p.m. 41.43 3.30 49.49 0.00 08Nov2017 12 a.m. 40.55 2.20 53.11 0.00 08Nov2017 1 a.m. 41.59 5.70 48.16 0.00 08Nov2017 2 a.m. 39.96 6.70 52.25 0.00 08Nov2017 3 a.m. 38.84 6.40 52.16 0.00 08Nov2017 4 a.m. 38.25 5.90 53.41 0.00 08Nov2017 5 a.m. 37.60 6.20 55.23 0.00 08Nov2017 6 a.m. 36.97 5.30 55.16 0.00 08Nov2017 7 a.m. 36.28 5.90 56.86 0.00 Accuml. Values 990.57 196.90 1369.14 1537.80 Num. Valid Values 24 24 24 24 Avg. Values 41.27 8.20 57.05 64.07 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 5.15 316.81 57.05 132.22 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4295 definition: xcompl = 1 - (RELH_avg/100) TdC = -2.6424 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 = 0.4829 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5171 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.2365 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 = 3.8013 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.3355 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.093 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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