Detailed Weather Data for Project: WEBB

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 55.00 3.20 99.76 0.00 04Nov2017 9 a.m. 55.72 4.50 99.87 7.60 04Nov2017 10 a.m. 57.09 3.90 99.73 78.80 04Nov2017 11 a.m. 59.63 8.40 99.05 206.50 04Nov2017 12 p.m. 64.63 8.40 88.06 342.70 04Nov2017 1 p.m. 69.55 5.30 78.86 171.40 04Nov2017 2 p.m. 73.69 10.90 71.80 265.60 04Nov2017 3 p.m. 75.97 10.60 66.30 344.50 04Nov2017 4 p.m. 77.41 10.20 62.73 271.80 04Nov2017 5 p.m. 79.14 8.50 60.13 259.60 04Nov2017 6 p.m. 78.57 7.90 61.81 62.20 04Nov2017 7 p.m. 76.24 5.60 63.81 1.40 04Nov2017 8 p.m. 56.48 10.70 75.99 0.00 04Nov2017 9 p.m. 68.13 4.90 87.37 0.00 04Nov2017 10 p.m. 67.50 5.60 88.83 0.00 04Nov2017 11 p.m. 67.01 6.90 88.61 0.00 05Nov2017 12 a.m. 71.98 10.80 76.11 0.00 05Nov2017 1 a.m. 72.77 11.20 74.30 0.00 05Nov2017 2 a.m. 72.34 9.80 75.51 0.00 05Nov2017 3 a.m. 71.29 9.60 78.14 0.00 05Nov2017 4 a.m. 70.11 6.60 81.24 0.00 05Nov2017 5 a.m. 70.25 7.30 81.54 0.00 05Nov2017 6 a.m. 69.31 7.90 83.98 0.00 05Nov2017 7 a.m. 68.29 7.80 86.40 0.00 Accuml. Values 1648.11 186.50 1929.93 2012.10 Num. Valid Values 24 24 24 24 Avg. Values 68.67 7.77 80.41 83.84 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 20.37 300.08 80.41 173.00 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1959 definition: xcompl = 1 - (RELH_avg/100) TdC = 16.9296 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 = 0.6911 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3089 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.1466 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 = 4.6333 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.9734 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.092 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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