Detailed Weather Data for Project: WIST

Date Time TAIR WSPD RELH SRAD 05Nov2017 8 a.m. 75.18 3.19 57.70 48.00 05Nov2017 9 a.m. 76.50 4.68 46.10 204.00 05Nov2017 10 a.m. 77.92 5.32 43.47 434.00 05Nov2017 11 a.m. 78.24 6.30 51.95 427.00 05Nov2017 12 p.m. 79.66 5.15 43.22 616.00 05Nov2017 1 p.m. 81.54 5.60 46.46 611.00 05Nov2017 2 p.m. 82.74 5.34 42.06 551.00 05Nov2017 3 p.m. 82.53 5.42 43.77 431.00 05Nov2017 4 p.m. 83.19 3.32 48.90 276.00 05Nov2017 5 p.m. 80.89 1.13 35.29 54.00 05Nov2017 6 p.m. 74.30 5.02 36.02 4.00 05Nov2017 7 p.m. 54.28 3.22 96.09 1.00 05Nov2017 8 p.m. 58.78 9.32 72.53 0.00 05Nov2017 9 p.m. 57.25 8.14 74.79 0.00 05Nov2017 10 p.m. 56.93 6.55 74.79 0.00 05Nov2017 11 p.m. 55.71 5.15 77.96 0.00 06Nov2017 12 a.m. 54.50 3.40 80.04 0.00 06Nov2017 1 a.m. 53.74 0.26 84.92 0.00 06Nov2017 2 a.m. 51.98 0.18 88.16 0.00 06Nov2017 3 a.m. 51.42 0.27 89.68 0.00 06Nov2017 4 a.m. 51.31 0.33 91.33 0.00 06Nov2017 5 a.m. 51.53 0.59 92.67 0.00 06Nov2017 6 a.m. 52.86 0.39 89.74 0.00 06Nov2017 7 a.m. 54.09 0.25 85.97 1.00 Accuml. Values 1577.08 88.52 1593.61 3658.00 Num. Valid Values 24 24 24 24 Avg. Values 65.71 3.69 66.40 152.42 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 18.73 142.43 66.40 314.51 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3360 definition: xcompl = 1 - (RELH_avg/100) TdC = 12.4317 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 = 0.6717 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3283 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.9667 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 = 7.1715 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.7164 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.139 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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