Detailed Weather Data for Project: GSAL

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 43.11 3.20 93.62 60.00 03Mar2018 9 a.m. 48.52 5.00 81.91 288.70 03Mar2018 10 a.m. 55.08 10.90 66.91 503.00 03Mar2018 11 a.m. 60.64 13.70 60.46 670.10 03Mar2018 12 p.m. 64.49 14.10 56.95 780.20 03Mar2018 1 p.m. 67.98 13.80 53.25 824.60 03Mar2018 2 p.m. 71.04 14.70 50.84 800.50 03Mar2018 3 p.m. 72.99 15.40 48.54 707.40 03Mar2018 4 p.m. 73.35 14.90 46.23 554.80 03Mar2018 5 p.m. 72.46 13.50 47.16 354.40 03Mar2018 6 p.m. 69.26 9.10 52.09 142.90 03Mar2018 7 p.m. 62.37 10.10 93.34 0.00 03Mar2018 8 p.m. 63.10 5.70 62.50 0.00 03Mar2018 9 p.m. 60.39 2.90 67.13 0.00 03Mar2018 10 p.m. 59.18 3.10 68.23 0.00 03Mar2018 11 p.m. 57.92 3.30 69.86 0.00 04Mar2018 12 a.m. 55.96 3.30 73.85 0.00 04Mar2018 1 a.m. 54.19 2.70 77.09 0.00 04Mar2018 2 a.m. 52.25 3.30 81.43 0.00 04Mar2018 3 a.m. 53.35 3.90 76.99 0.00 04Mar2018 4 a.m. 54.90 3.70 71.48 0.00 04Mar2018 5 a.m. 56.28 3.50 68.36 0.00 04Mar2018 6 a.m. 55.76 3.00 68.07 0.00 04Mar2018 7 a.m. 56.80 4.10 70.43 0.00 Accuml. Values 1441.36 180.90 1606.72 5686.60 Num. Valid Values 24 24 24 24 Avg. Values 60.06 7.54 66.95 236.94 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.59 291.07 66.95 488.93 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3305 definition: xcompl = 1 - (RELH_avg/100) TdC = 9.5491 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 = 0.6323 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3677 definition: del_lambda2 = 1 - del_lambda1 Qn = 5.1896 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 = 5.7959 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.9337 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.215 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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