Detailed Weather Data for Project: GSAL

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 41.13 2.50 98.05 0.70 03Dec2017 9 a.m. 42.42 2.10 96.88 54.10 03Dec2017 10 a.m. 45.00 2.60 94.04 192.50 03Dec2017 11 a.m. 50.70 2.00 85.68 248.90 03Dec2017 12 p.m. 57.65 4.50 76.13 465.40 03Dec2017 1 p.m. 62.89 8.50 63.90 389.30 03Dec2017 2 p.m. 64.45 8.90 58.36 403.70 03Dec2017 3 p.m. 67.57 8.60 54.05 318.10 03Dec2017 4 p.m. 69.73 10.30 51.72 241.10 03Dec2017 5 p.m. 68.07 7.40 58.00 83.60 03Dec2017 6 p.m. 65.98 8.40 65.09 0.00 03Dec2017 7 p.m. 53.92 14.30 33.43 0.00 03Dec2017 8 p.m. 65.86 11.10 69.06 0.00 03Dec2017 9 p.m. 64.96 12.50 72.66 0.00 03Dec2017 10 p.m. 64.60 12.00 76.32 0.00 03Dec2017 11 p.m. 64.72 11.60 78.10 0.00 04Dec2017 12 a.m. 64.17 12.60 82.46 0.00 04Dec2017 1 a.m. 64.08 15.60 86.30 0.00 04Dec2017 2 a.m. 63.93 15.40 87.26 0.00 04Dec2017 3 a.m. 63.61 12.80 88.16 0.00 04Dec2017 4 a.m. 63.75 12.00 86.94 0.00 04Dec2017 5 a.m. 63.97 11.90 86.43 0.00 04Dec2017 6 a.m. 65.16 13.30 81.61 0.00 04Dec2017 7 a.m. 64.63 13.70 80.71 0.00 Accuml. Values 1462.94 234.60 1811.34 2397.40 Num. Valid Values 24 24 24 24 Avg. Values 60.96 9.78 75.47 99.89 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 16.09 377.47 75.47 206.13 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2453 definition: xcompl = 1 - (RELH_avg/100) TdC = 11.8050 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 = 0.6388 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3612 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.3987 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 = 4.4367 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.6199 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.115 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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