Detailed Weather Data for Project: ROBE

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 58.50 0.83 100.34 1.00 04Nov2017 9 a.m. 59.05 1.10 100.34 19.00 04Nov2017 10 a.m. 61.45 1.14 100.33 166.00 04Nov2017 11 a.m. 65.10 1.66 100.28 147.00 04Nov2017 12 p.m. 73.00 1.49 89.96 522.00 04Nov2017 1 p.m. 76.86 6.21 78.48 232.00 04Nov2017 2 p.m. 76.19 11.64 80.36 365.00 04Nov2017 3 p.m. 79.38 6.71 72.48 298.00 04Nov2017 4 p.m. 79.14 7.87 71.26 312.00 04Nov2017 5 p.m. 81.12 8.86 67.47 271.00 04Nov2017 6 p.m. 79.90 6.84 72.90 121.00 04Nov2017 7 p.m. 76.39 2.72 84.44 7.00 04Nov2017 8 p.m. 61.66 10.87 81.57 0.00 04Nov2017 9 p.m. 75.31 4.70 90.86 0.00 04Nov2017 10 p.m. 75.72 2.46 85.79 0.00 04Nov2017 11 p.m. 75.96 4.56 82.56 0.00 05Nov2017 12 a.m. 76.30 8.38 80.97 0.00 05Nov2017 1 a.m. 75.96 5.69 82.18 0.00 05Nov2017 2 a.m. 75.96 3.64 82.25 1.00 05Nov2017 3 a.m. 75.52 5.73 85.67 0.00 05Nov2017 4 a.m. 74.86 4.37 89.63 0.00 05Nov2017 5 a.m. 74.62 3.81 91.53 0.00 05Nov2017 6 a.m. 74.41 5.06 93.78 0.00 05Nov2017 7 a.m. 74.53 3.43 92.82 1.00 Accuml. Values 1756.88 119.77 2058.25 2463.00 Num. Valid Values 24 24 24 24 Avg. Values 73.20 4.99 85.76 102.63 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 22.89 192.71 85.76 211.77 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1424 definition: xcompl = 1 - (RELH_avg/100) TdC = 20.3930 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 = 0.7190 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.2810 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.7816 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 = 3.9482 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.2775 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.087 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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