Detailed Weather Data for Project: GSAL

Date Time TAIR WSPD RELH SRAD 05Nov2017 8 a.m. 44.65 5.90 97.90 42.80 05Nov2017 9 a.m. 47.62 7.20 95.93 51.00 05Nov2017 10 a.m. 51.49 10.00 91.65 66.50 05Nov2017 11 a.m. 53.15 10.20 86.75 61.70 05Nov2017 12 p.m. 53.28 12.50 82.04 86.70 05Nov2017 1 p.m. 53.53 11.90 76.71 103.00 05Nov2017 2 p.m. 50.16 14.00 80.71 96.90 05Nov2017 3 p.m. 49.23 11.70 80.24 112.30 05Nov2017 4 p.m. 51.04 9.70 73.61 82.30 05Nov2017 5 p.m. 50.92 10.10 72.42 29.00 05Nov2017 6 p.m. 50.47 7.20 71.03 0.00 05Nov2017 7 p.m. 44.47 3.80 67.81 0.00 05Nov2017 8 p.m. 46.33 4.50 73.82 0.00 05Nov2017 9 p.m. 43.48 2.50 77.56 0.00 05Nov2017 10 p.m. 41.76 2.60 80.63 0.00 05Nov2017 11 p.m. 40.53 1.90 83.82 0.00 06Nov2017 12 a.m. 40.28 1.90 85.57 0.00 06Nov2017 1 a.m. 40.21 1.90 87.08 0.00 06Nov2017 2 a.m. 39.85 2.80 87.57 0.00 06Nov2017 3 a.m. 39.38 3.20 88.03 0.00 06Nov2017 4 a.m. 39.69 4.60 86.80 0.00 06Nov2017 5 a.m. 40.17 6.90 82.86 0.00 06Nov2017 6 a.m. 40.46 8.00 79.16 0.00 06Nov2017 7 a.m. 40.50 8.30 76.74 0.00 Accuml. Values 1092.65 163.30 1966.44 732.20 Num. Valid Values 24 24 24 24 Avg. Values 45.53 6.80 81.93 30.51 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 7.51 262.75 81.93 62.95 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1807 definition: xcompl = 1 - (RELH_avg/100) TdC = 4.6337 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 = 0.5186 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4814 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.4155 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 = 1.8796 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.0596 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.031 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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