Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 05Nov2017 8 a.m. 47.88 3.91 81.00 74.00 05Nov2017 9 a.m. 59.60 4.32 61.33 256.00 05Nov2017 10 a.m. 71.15 8.16 42.00 425.25 05Nov2017 11 a.m. 75.08 8.65 33.00 509.33 05Nov2017 12 p.m. 78.53 10.35 28.00 619.00 05Nov2017 1 p.m. 78.02 13.94 29.33 652.67 05Nov2017 2 p.m. 74.30 15.04 34.50 617.00 05Nov2017 3 p.m. 71.33 16.16 40.00 508.50 05Nov2017 4 p.m. 69.17 18.29 43.00 350.50 05Nov2017 5 p.m. 64.89 17.73 51.00 182.25 05Nov2017 6 p.m. 58.28 15.21 65.00 0.00 05Nov2017 7 p.m. 55.76 16.33 72.00 0.00 05Nov2017 8 p.m. 53.60 17.90 75.50 0.00 05Nov2017 9 p.m. 50.30 16.25 82.33 0.00 05Nov2017 10 p.m. 48.78 17.28 82.50 0.00 05Nov2017 11 p.m. 48.20 15.15 81.75 0.00 06Nov2017 12 a.m. 47.84 14.54 82.25 0.00 06Nov2017 1 a.m. 47.34 12.08 81.75 0.00 06Nov2017 2 a.m. 45.59 7.77 85.25 0.00 06Nov2017 3 a.m. 43.82 6.26 87.67 0.00 06Nov2017 4 a.m. 42.44 6.65 87.75 0.00 06Nov2017 5 a.m. 41.90 7.38 85.50 0.00 06Nov2017 6 a.m. 39.74 5.37 88.75 0.00 06Nov2017 7 a.m. 38.93 5.14 91.50 3.00 Accuml. Values 1352.47 279.86 1592.66 4197.50 Num. Valid Values 24 24 24 24 Avg. Values 56.35 11.66 66.36 174.90 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.53 450.29 66.36 360.90 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3364 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.4511 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 = 0.6049 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3951 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.2483 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 = 5.1744 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.3316 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.191 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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