Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 23.23 5.31 80.00 4.75 06Dec2017 9 a.m. 25.28 6.79 76.33 33.67 06Dec2017 10 a.m. 34.79 8.05 55.50 233.00 06Dec2017 11 a.m. 45.08 7.46 36.00 473.67 06Dec2017 12 p.m. 52.07 10.07 27.00 571.00 06Dec2017 1 p.m. 53.84 15.43 26.00 594.67 06Dec2017 2 p.m. 54.99 16.50 25.00 557.00 06Dec2017 3 p.m. 55.28 17.37 19.00 434.00 06Dec2017 4 p.m. 54.45 14.65 19.50 255.00 06Dec2017 5 p.m. 51.12 11.74 20.75 62.50 06Dec2017 6 p.m. 43.52 8.50 29.00 0.00 06Dec2017 7 p.m. 37.94 7.61 37.00 0.00 06Dec2017 8 p.m. 35.15 6.26 39.50 0.00 06Dec2017 9 p.m. 31.28 6.11 49.33 0.00 06Dec2017 10 p.m. 28.18 6.26 54.25 0.00 06Dec2017 11 p.m. 30.07 7.61 52.00 0.00 07Dec2017 12 a.m. 31.91 9.28 46.50 0.00 07Dec2017 1 a.m. 30.02 8.67 50.00 0.00 07Dec2017 2 a.m. 30.88 12.92 49.50 0.00 07Dec2017 3 a.m. 32.90 16.85 52.00 0.00 07Dec2017 4 a.m. 31.24 15.21 61.50 0.00 07Dec2017 5 a.m. 30.29 16.89 69.00 0.00 07Dec2017 6 a.m. 28.94 13.92 72.25 0.00 07Dec2017 7 a.m. 27.32 13.65 72.50 0.00 Accuml. Values 899.77 263.11 1119.41 3219.26 Num. Valid Values 24 24 24 24 Avg. Values 37.49 10.96 46.64 134.14 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.05 423.34 46.64 276.79 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5336 definition: xcompl = 1 - (RELH_avg/100) TdC = -7.3363 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 = 0.4506 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5494 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.6815 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 = 4.1030 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.7070 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.153 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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