Detailed Weather Data for Project: GSAL

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 58.64 6.70 73.71 8.10 04Mar2018 9 a.m. 59.58 7.90 75.54 56.10 04Mar2018 10 a.m. 60.67 11.40 81.05 61.70 04Mar2018 11 a.m. 60.28 11.50 87.03 67.10 04Mar2018 12 p.m. 60.93 10.90 87.00 95.10 04Mar2018 1 p.m. 61.43 12.00 87.77 80.30 04Mar2018 2 p.m. 62.06 11.80 87.73 125.60 04Mar2018 3 p.m. 63.27 13.00 86.92 99.90 04Mar2018 4 p.m. 63.28 11.20 87.12 72.70 04Mar2018 5 p.m. 63.48 11.50 88.14 29.50 04Mar2018 6 p.m. 62.91 11.70 93.54 13.60 04Mar2018 7 p.m. 55.54 7.90 13.11 4.60 04Mar2018 8 p.m. 62.62 6.20 91.04 0.00 04Mar2018 9 p.m. 62.28 6.50 89.86 0.00 04Mar2018 10 p.m. 62.47 7.20 91.32 0.00 04Mar2018 11 p.m. 63.00 5.60 92.27 0.00 05Mar2018 12 a.m. 62.67 9.20 93.25 0.00 05Mar2018 1 a.m. 62.24 6.20 95.05 0.00 05Mar2018 2 a.m. 62.47 10.40 96.35 0.00 05Mar2018 3 a.m. 62.80 12.40 91.83 0.00 05Mar2018 4 a.m. 58.41 22.20 67.21 0.00 05Mar2018 5 a.m. 46.96 20.70 60.77 0.00 05Mar2018 6 a.m. 46.56 16.40 53.69 0.00 05Mar2018 7 a.m. 46.36 11.70 52.10 0.00 Accuml. Values 1430.90 262.20 1923.40 714.30 Num. Valid Values 24 24 24 24 Avg. Values 59.62 10.92 80.14 29.76 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.35 421.88 80.14 61.42 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1986 definition: xcompl = 1 - (RELH_avg/100) TdC = 11.9694 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 = 0.6291 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3709 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.3421 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 = 3.4381 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.8722 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.063 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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