Detailed Weather Data for Project: FOSS

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. 35.01 7.66 83.50 7.75 08Nov2017 9 a.m. 36.08 6.71 80.33 54.67 08Nov2017 10 a.m. 38.25 9.23 72.75 200.25 08Nov2017 11 a.m. 40.94 9.62 63.33 292.33 08Nov2017 12 p.m. 44.24 10.90 56.25 381.75 08Nov2017 1 p.m. 45.02 8.80 53.67 327.67 08Nov2017 2 p.m. 46.98 6.21 45.50 344.50 08Nov2017 3 p.m. 49.22 5.82 40.33 493.67 08Nov2017 4 p.m. 48.92 3.30 40.00 324.75 08Nov2017 5 p.m. 48.15 1.96 41.25 150.25 08Nov2017 6 p.m. 43.88 1.79 50.00 0.00 08Nov2017 7 p.m. 37.40 6.26 72.00 0.00 08Nov2017 8 p.m. 34.52 5.70 81.50 0.00 08Nov2017 9 p.m. 33.74 2.24 87.67 0.00 08Nov2017 10 p.m. 34.40 0.82 86.00 0.00 08Nov2017 11 p.m. 30.02 2.24 92.00 0.00 09Nov2017 12 a.m. 30.88 1.68 90.25 0.00 09Nov2017 1 a.m. 29.98 0.39 91.50 0.00 09Nov2017 2 a.m. 29.26 1.96 93.50 0.00 09Nov2017 3 a.m. 27.56 2.68 94.33 0.00 09Nov2017 4 a.m. 27.01 3.69 95.00 0.00 09Nov2017 5 a.m. 27.50 1.68 96.00 0.00 09Nov2017 6 a.m. 26.65 3.13 96.25 0.00 09Nov2017 7 a.m. 27.77 2.46 96.50 1.50 Accuml. Values 873.38 106.93 1799.41 2579.09 Num. Valid Values 24 24 24 24 Avg. Values 36.39 4.46 74.98 107.46 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 2.44 172.05 74.98 221.75 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2502 definition: xcompl = 1 - (RELH_avg/100) TdC = -1.5212 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 = 0.4412 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5588 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.0775 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 = 1.8247 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.5600 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.053 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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