Detailed Weather Data for Project: GSAL

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 15.69 14.40 77.53 0.00 30Dec2017 9 a.m. 14.67 13.00 75.92 9.60 30Dec2017 10 a.m. 13.86 13.70 71.78 58.40 30Dec2017 11 a.m. 13.57 13.50 68.68 107.00 30Dec2017 12 p.m. 14.58 10.90 64.36 153.90 30Dec2017 1 p.m. 16.23 9.60 58.75 207.10 30Dec2017 2 p.m. 17.64 8.80 54.98 194.60 30Dec2017 3 p.m. 18.88 8.80 52.66 136.60 30Dec2017 4 p.m. 19.78 6.70 50.46 90.80 30Dec2017 5 p.m. 19.87 5.90 49.83 21.30 30Dec2017 6 p.m. 20.03 4.90 50.06 0.00 30Dec2017 7 p.m. 13.48 9.60 44.21 0.00 30Dec2017 8 p.m. 20.50 1.60 51.65 0.00 30Dec2017 9 p.m. 20.21 2.30 53.92 0.00 30Dec2017 10 p.m. 20.12 1.30 54.75 0.00 30Dec2017 11 p.m. 20.43 2.60 55.91 0.00 31Dec2017 12 a.m. 19.65 10.00 54.88 0.00 31Dec2017 1 a.m. 16.97 13.10 52.76 0.00 31Dec2017 2 a.m. 14.47 12.40 54.90 0.00 31Dec2017 3 a.m. 13.95 12.70 55.14 0.00 31Dec2017 4 a.m. 13.08 12.70 58.41 0.00 31Dec2017 5 a.m. 12.36 11.70 60.36 0.00 31Dec2017 6 a.m. 11.64 12.80 60.93 0.00 31Dec2017 7 a.m. 11.37 12.70 61.08 0.00 Accuml. Values 393.01 225.70 1393.91 979.30 Num. Valid Values 24 24 24 24 Avg. Values 16.38 9.40 58.08 40.80 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -8.68 363.15 58.08 84.20 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4192 definition: xcompl = 1 - (RELH_avg/100) TdC = -15.4342 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 = 0.2749 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7251 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.3675 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 = 1.3422 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.9087 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.051 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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