Detailed Weather Data for Project: WIST

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. 46.17 0.91 78.34 22.00 08Nov2017 9 a.m. 46.49 2.60 70.89 100.00 08Nov2017 10 a.m. 46.60 5.28 73.75 101.00 08Nov2017 11 a.m. 47.14 3.09 71.61 114.00 08Nov2017 12 p.m. 46.60 1.30 76.01 63.00 08Nov2017 1 p.m. 47.05 1.04 74.37 65.00 08Nov2017 2 p.m. 48.04 4.50 67.53 163.00 08Nov2017 3 p.m. 48.79 4.30 64.90 128.00 08Nov2017 4 p.m. 49.01 0.72 64.16 73.00 08Nov2017 5 p.m. 48.79 1.18 67.65 50.00 08Nov2017 6 p.m. 48.04 0.34 73.27 3.00 08Nov2017 7 p.m. 46.71 0.41 84.43 0.00 08Nov2017 8 p.m. 44.29 0.36 83.76 0.00 08Nov2017 9 p.m. 42.96 0.18 90.29 0.00 08Nov2017 10 p.m. 42.96 0.38 91.33 0.00 08Nov2017 11 p.m. 41.67 0.17 95.86 0.00 09Nov2017 12 a.m. 41.43 0.63 96.34 0.00 09Nov2017 1 a.m. 41.22 0.38 96.09 1.00 09Nov2017 2 a.m. 39.90 0.40 99.16 1.00 09Nov2017 3 a.m. 39.34 0.38 99.22 1.00 09Nov2017 4 a.m. 39.45 0.40 99.27 0.00 09Nov2017 5 a.m. 39.13 0.40 99.27 1.00 09Nov2017 6 a.m. 39.79 0.24 99.40 1.00 09Nov2017 7 a.m. 38.35 0.39 99.40 1.00 Accuml. Values 1059.92 29.98 2016.30 888.00 Num. Valid Values 24 24 24 24 Avg. Values 44.16 1.25 84.01 37.00 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.76 48.24 84.01 76.35 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1599 definition: xcompl = 1 - (RELH_avg/100) TdC = 4.2406 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 = 0.5072 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4928 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2921 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 = 1.5851 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.8398 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.010 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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