Detailed Weather Data for Project: GSAL

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 10.38 13.60 58.73 0.00 31Dec2017 9 a.m. 9.41 14.20 57.59 41.50 31Dec2017 10 a.m. 9.59 16.50 56.39 172.40 31Dec2017 11 a.m. 11.05 16.50 46.98 315.90 31Dec2017 12 p.m. 13.01 15.60 38.38 437.50 31Dec2017 1 p.m. 14.58 15.60 36.51 484.80 31Dec2017 2 p.m. 15.46 14.60 36.14 471.70 31Dec2017 3 p.m. 17.08 14.30 36.75 419.30 31Dec2017 4 p.m. 17.26 13.60 35.85 276.40 31Dec2017 5 p.m. 16.59 13.70 37.58 78.20 31Dec2017 6 p.m. 15.12 12.00 40.10 1.50 31Dec2017 7 p.m. 11.82 2.10 38.87 0.00 31Dec2017 8 p.m. 12.69 9.40 46.30 0.00 31Dec2017 9 p.m. 11.34 10.40 46.45 0.00 31Dec2017 10 p.m. 10.44 8.70 49.29 0.00 31Dec2017 11 p.m. 9.37 7.50 53.39 0.00 01Jan2018 12 a.m. 8.08 6.10 56.06 0.00 01Jan2018 1 a.m. 6.37 5.40 59.78 0.00 01Jan2018 2 a.m. 5.04 4.70 62.80 0.00 01Jan2018 3 a.m. 3.65 4.50 65.78 0.00 01Jan2018 4 a.m. 2.61 6.20 69.39 0.00 01Jan2018 5 a.m. 2.19 5.70 71.13 0.00 01Jan2018 6 a.m. 0.50 3.30 75.18 0.00 01Jan2018 7 a.m. -0.78 1.80 77.13 0.00 Accuml. Values 232.82 236.00 1252.55 2699.20 Num. Valid Values 24 24 24 24 Avg. Values 9.70 9.83 52.19 112.47 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -12.39 379.72 52.19 232.08 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4781 definition: xcompl = 1 - (RELH_avg/100) TdC = -20.2060 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 = 0.2258 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7742 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.8286 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 = 1.1419 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.7096 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.059 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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