Detailed Weather Data for Project: BIRC

Date Time TAIR WSPD RELH SRAD 05Nov2017 8 a.m. 63.81 1.45 88.05 95.27 05Nov2017 9 a.m. 66.99 2.53 75.51 306.17 05Nov2017 10 a.m. 68.56 5.27 62.39 366.89 05Nov2017 11 a.m. 67.03 4.63 50.52 597.35 05Nov2017 12 p.m. 62.89 5.21 64.98 645.63 05Nov2017 1 p.m. 57.56 5.78 74.46 228.81 05Nov2017 2 p.m. 54.23 5.32 78.67 108.91 05Nov2017 3 p.m. 53.62 5.21 76.71 81.48 05Nov2017 4 p.m. 53.17 6.09 73.87 62.64 05Nov2017 5 p.m. 53.01 4.48 71.71 23.16 05Nov2017 6 p.m. 51.71 4.58 71.74 1.40 05Nov2017 7 p.m. 40.26 3.76 84.76 0.10 05Nov2017 8 p.m. 50.70 1.79 71.09 0.10 05Nov2017 9 p.m. 49.23 2.01 74.76 0.10 05Nov2017 10 p.m. 47.21 5.60 76.68 0.10 05Nov2017 11 p.m. 45.88 9.12 74.77 0.12 06Nov2017 12 a.m. 44.13 7.97 77.19 0.11 06Nov2017 1 a.m. 44.47 7.63 77.20 0.11 06Nov2017 2 a.m. 45.64 6.76 75.40 0.11 06Nov2017 3 a.m. 45.93 4.67 76.11 0.10 06Nov2017 4 a.m. 45.99 5.71 76.62 0.10 06Nov2017 5 a.m. 45.86 7.57 76.10 0.11 06Nov2017 6 a.m. 45.18 7.40 75.14 0.10 06Nov2017 7 a.m. 43.74 7.41 74.66 0.51 Accuml. Values 1246.78 127.95 1779.09 2519.48 Num. Valid Values 24 24 24 24 Avg. Values 51.95 5.33 74.13 104.98 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 11.08 205.87 74.13 216.62 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2587 definition: xcompl = 1 - (RELH_avg/100) TdC = 6.6952 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 = 0.5708 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4292 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.3238 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 = 3.3925 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.9798 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.080 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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