Detailed Weather Data for Project: WDMA

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 58.53 1.20 97.94 0.00 04Nov2017 9 a.m. 58.75 1.10 98.32 9.30 04Nov2017 10 a.m. 60.24 1.70 98.66 51.80 04Nov2017 11 a.m. 63.43 3.20 98.68 197.00 04Nov2017 12 p.m. 69.73 3.10 87.32 425.00 04Nov2017 1 p.m. 77.67 5.50 72.40 391.90 04Nov2017 2 p.m. 77.72 6.70 71.44 157.80 04Nov2017 3 p.m. 78.42 5.70 69.25 161.90 04Nov2017 4 p.m. 79.86 6.20 66.89 192.40 04Nov2017 5 p.m. 81.48 6.30 61.91 177.90 04Nov2017 6 p.m. 80.24 6.30 64.83 61.90 04Nov2017 7 p.m. 78.08 4.60 70.76 1.30 04Nov2017 8 p.m. 68.67 6.70 60.90 0.00 04Nov2017 9 p.m. 73.49 0.70 80.32 0.00 04Nov2017 10 p.m. 75.65 4.20 76.51 0.00 04Nov2017 11 p.m. 75.79 4.10 74.69 0.00 05Nov2017 12 a.m. 76.05 4.70 73.46 0.00 05Nov2017 1 a.m. 76.62 4.40 72.12 0.00 05Nov2017 2 a.m. 76.08 3.00 73.29 0.00 05Nov2017 3 a.m. 75.69 2.40 74.39 0.00 05Nov2017 4 a.m. 74.17 1.80 77.49 0.00 05Nov2017 5 a.m. 72.73 1.80 81.57 0.00 05Nov2017 6 a.m. 74.46 2.40 79.30 0.00 05Nov2017 7 a.m. 74.25 2.10 79.95 0.00 Accuml. Values 1757.80 89.90 1862.39 1828.20 Num. Valid Values 24 24 24 24 Avg. Values 73.24 3.75 77.60 76.18 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 22.91 144.65 77.60 157.19 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2240 definition: xcompl = 1 - (RELH_avg/100) TdC = 18.8561 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 = 0.7193 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.2807 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.0315 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 = 6.1625 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.1591 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.075 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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