Detailed Weather Data for Project: WIST

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 54.63 0.38 89.75 2.00 04Nov2017 9 a.m. 55.18 0.19 89.08 41.00 04Nov2017 10 a.m. 58.80 0.34 86.82 154.00 04Nov2017 11 a.m. 64.40 0.23 78.14 332.00 04Nov2017 12 p.m. 72.54 2.83 67.58 325.00 04Nov2017 1 p.m. 72.97 4.24 70.63 139.00 04Nov2017 2 p.m. 76.15 3.46 61.05 191.00 04Nov2017 3 p.m. 79.23 2.88 47.68 407.00 04Nov2017 4 p.m. 80.22 2.60 47.13 361.00 04Nov2017 5 p.m. 79.02 1.94 56.35 239.00 04Nov2017 6 p.m. 77.47 1.30 51.47 126.00 04Nov2017 7 p.m. 75.16 0.56 53.60 9.00 04Nov2017 8 p.m. 63.30 11.80 55.74 0.00 04Nov2017 9 p.m. 74.84 1.34 56.72 1.00 04Nov2017 10 p.m. 75.06 1.27 49.45 0.00 04Nov2017 11 p.m. 74.73 2.14 54.46 0.00 05Nov2017 12 a.m. 74.52 0.78 51.96 0.00 05Nov2017 1 a.m. 75.51 1.94 54.46 0.00 05Nov2017 2 a.m. 75.72 2.94 55.68 0.00 05Nov2017 3 a.m. 75.06 2.67 54.70 0.00 05Nov2017 4 a.m. 74.84 2.33 59.04 0.00 05Nov2017 5 a.m. 74.50 2.94 57.63 0.00 05Nov2017 6 a.m. 74.08 3.07 59.59 0.00 05Nov2017 7 a.m. 74.07 2.37 58.30 1.00 Accuml. Values 1731.99 56.54 1467.01 2328.00 Num. Valid Values 24 24 24 24 Avg. Values 72.17 2.36 61.13 97.00 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 22.31 90.97 61.13 200.16 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3887 definition: xcompl = 1 - (RELH_avg/100) TdC = 14.5684 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 = 0.7128 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.2872 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.5936 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 = 10.3574 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.3501 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.105 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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