Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 43.34 3.36 99.50 2.50 04Nov2017 9 a.m. 43.88 4.36 100.00 22.25 04Nov2017 10 a.m. 48.68 2.39 99.00 195.00 04Nov2017 11 a.m. 57.15 4.14 79.25 446.75 04Nov2017 12 p.m. 65.24 7.16 56.67 544.67 04Nov2017 1 p.m. 75.15 9.45 38.75 668.25 04Nov2017 2 p.m. 82.52 11.56 26.00 685.00 04Nov2017 3 p.m. 86.36 10.63 20.50 618.50 04Nov2017 4 p.m. 86.72 11.80 20.00 514.00 04Nov2017 5 p.m. 83.75 8.50 20.75 190.25 04Nov2017 6 p.m. 80.96 5.82 24.33 78.00 04Nov2017 7 p.m. 73.40 6.26 33.00 0.00 04Nov2017 8 p.m. 70.70 2.91 35.00 0.00 04Nov2017 9 p.m. 70.25 5.14 37.50 0.00 04Nov2017 10 p.m. 69.32 4.62 39.33 0.00 04Nov2017 11 p.m. 66.42 3.24 45.25 0.00 05Nov2017 12 a.m. 56.25 3.58 62.75 0.00 05Nov2017 1 a.m. 52.79 3.19 70.00 0.00 05Nov2017 2 a.m. 51.75 3.75 73.50 0.00 05Nov2017 3 a.m. 54.50 2.83 68.33 0.00 05Nov2017 4 a.m. 51.89 3.75 71.25 0.00 05Nov2017 5 a.m. 48.29 4.36 80.00 0.00 05Nov2017 6 a.m. 47.07 3.80 83.25 0.00 05Nov2017 7 a.m. 46.22 4.36 84.00 1.00 Accuml. Values 1512.60 130.96 1367.91 3966.17 Num. Valid Values 24 24 24 24 Avg. Values 63.02 5.46 57.00 165.26 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 17.24 210.71 57.00 341.01 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4300 definition: xcompl = 1 - (RELH_avg/100) TdC = 8.7026 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 = 0.6533 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3467 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.2318 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 = 8.4173 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.7211 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.175 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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