Detailed Weather Data for Project: GSAL

Date Time TAIR WSPD RELH SRAD 06Nov2017 8 a.m. 39.94 8.30 76.22 0.90 06Nov2017 9 a.m. 39.63 8.90 75.59 27.00 06Nov2017 10 a.m. 39.45 9.10 75.64 58.30 06Nov2017 11 a.m. 39.67 7.20 75.84 97.30 06Nov2017 12 p.m. 40.71 6.50 75.36 154.20 06Nov2017 1 p.m. 42.03 6.70 73.09 176.80 06Nov2017 2 p.m. 42.98 7.30 72.06 202.30 06Nov2017 3 p.m. 44.02 6.90 69.19 143.80 06Nov2017 4 p.m. 44.69 7.40 69.35 50.10 06Nov2017 5 p.m. 45.36 6.00 65.93 25.50 06Nov2017 6 p.m. 45.36 3.60 64.54 0.00 06Nov2017 7 p.m. 41.59 7.90 55.86 0.00 06Nov2017 8 p.m. 43.95 3.20 70.96 0.00 06Nov2017 9 p.m. 43.70 1.80 73.21 0.00 06Nov2017 10 p.m. 42.66 1.50 75.87 0.00 06Nov2017 11 p.m. 39.97 1.90 83.19 0.00 07Nov2017 12 a.m. 37.83 0.40 87.39 0.00 07Nov2017 1 a.m. 36.57 0.50 89.80 0.00 07Nov2017 2 a.m. 36.66 2.10 89.59 0.00 07Nov2017 3 a.m. 36.18 2.90 88.31 0.00 07Nov2017 4 a.m. 36.93 2.40 83.64 0.00 07Nov2017 5 a.m. 36.66 5.00 78.37 0.00 07Nov2017 6 a.m. 37.08 7.30 73.53 0.00 07Nov2017 7 a.m. 36.12 6.30 74.72 0.00 Accuml. Values 969.74 121.10 1817.25 936.20 Num. Valid Values 24 24 24 24 Avg. Values 40.41 5.05 75.72 39.01 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.67 194.85 75.72 80.49 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2428 definition: xcompl = 1 - (RELH_avg/100) TdC = 0.7752 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 = 0.4755 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5245 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2772 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 = 2.0694 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.8681 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.033 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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