Detailed Weather Data for Project: GSAL

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 32.09 5.00 87.20 0.00 29Dec2017 9 a.m. 33.49 7.50 85.81 0.50 29Dec2017 10 a.m. 34.23 10.40 84.62 24.70 29Dec2017 11 a.m. 34.86 11.50 83.13 72.90 29Dec2017 12 p.m. 35.47 11.80 81.73 107.90 29Dec2017 1 p.m. 36.16 12.30 79.09 153.40 29Dec2017 2 p.m. 37.85 11.20 73.99 290.10 29Dec2017 3 p.m. 40.06 9.80 67.94 374.50 29Dec2017 4 p.m. 41.52 7.20 64.15 205.60 29Dec2017 5 p.m. 41.81 4.00 64.38 69.30 29Dec2017 6 p.m. 39.65 3.40 69.62 1.00 29Dec2017 7 p.m. 20.37 3.10 50.60 0.00 29Dec2017 8 p.m. 33.51 1.50 82.68 0.00 29Dec2017 9 p.m. 31.75 2.10 87.89 0.00 29Dec2017 10 p.m. 31.78 3.10 87.61 0.00 29Dec2017 11 p.m. 30.96 9.40 87.04 0.00 30Dec2017 12 a.m. 28.62 12.70 83.94 0.00 30Dec2017 1 a.m. 26.69 15.30 84.95 0.00 30Dec2017 2 a.m. 24.73 14.50 84.95 0.00 30Dec2017 3 a.m. 22.62 14.50 79.82 0.00 30Dec2017 4 a.m. 21.20 14.80 78.70 0.00 30Dec2017 5 a.m. 19.78 13.00 76.97 0.00 30Dec2017 6 a.m. 18.34 13.00 76.21 0.00 30Dec2017 7 a.m. 16.68 14.80 78.25 0.00 Accuml. Values 734.23 225.90 1881.27 1299.90 Num. Valid Values 24 24 24 24 Avg. Values 30.59 9.41 78.39 54.16 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -0.78 363.47 78.39 111.77 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2161 definition: xcompl = 1 - (RELH_avg/100) TdC = -4.0639 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 = 0.3915 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6085 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.0569 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 = 1.2546 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.7997 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.042 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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