Detailed Weather Data for Project: GSAL

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 33.06 6.80 34.68 0.00 05Dec2017 9 a.m. 33.08 7.00 35.55 35.30 05Dec2017 10 a.m. 34.20 6.60 35.24 210.10 05Dec2017 11 a.m. 37.15 7.50 31.10 308.70 05Dec2017 12 p.m. 40.01 7.50 30.48 527.50 05Dec2017 1 p.m. 40.77 10.30 35.48 580.50 05Dec2017 2 p.m. 42.69 9.90 32.69 536.20 05Dec2017 3 p.m. 45.09 8.50 30.75 396.90 05Dec2017 4 p.m. 46.58 7.80 28.59 288.80 05Dec2017 5 p.m. 47.70 5.80 26.81 92.60 05Dec2017 6 p.m. 45.52 8.00 27.69 0.00 05Dec2017 7 p.m. 42.76 1.20 38.86 0.00 05Dec2017 8 p.m. 42.40 9.00 29.34 0.00 05Dec2017 9 p.m. 40.24 9.80 33.26 0.00 05Dec2017 10 p.m. 38.91 9.40 35.59 0.00 05Dec2017 11 p.m. 37.49 11.00 43.52 0.00 06Dec2017 12 a.m. 36.68 11.80 45.54 0.00 06Dec2017 1 a.m. 38.48 13.90 51.73 0.00 06Dec2017 2 a.m. 37.54 12.70 51.41 0.00 06Dec2017 3 a.m. 35.69 11.10 53.68 0.00 06Dec2017 4 a.m. 34.14 11.10 54.68 0.00 06Dec2017 5 a.m. 35.06 11.00 54.24 0.00 06Dec2017 6 a.m. 34.18 10.30 57.61 0.00 06Dec2017 7 a.m. 32.61 12.30 57.99 0.00 Accuml. Values 932.03 220.30 956.51 2976.60 Num. Valid Values 24 24 24 24 Avg. Values 38.83 9.18 39.85 124.03 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.80 354.46 39.85 255.93 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6015 definition: xcompl = 1 - (RELH_avg/100) TdC = -8.7369 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 = 0.4621 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5379 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.4847 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 = 4.8833 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.8454 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.151 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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