Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 52.11 6.32 100.00 14.25 04Dec2017 9 a.m. 55.46 7.23 99.00 130.67 04Dec2017 10 a.m. 60.84 12.75 90.25 281.75 04Dec2017 11 a.m. 65.66 14.99 65.67 378.33 04Dec2017 12 p.m. 69.93 13.42 42.25 387.25 04Dec2017 1 p.m. 72.08 13.57 31.00 309.67 04Dec2017 2 p.m. 76.19 11.52 22.50 351.00 04Dec2017 3 p.m. 77.00 14.09 19.00 311.25 04Dec2017 4 p.m. 69.44 18.34 26.75 186.00 04Dec2017 5 p.m. 64.80 18.96 27.50 129.50 04Dec2017 6 p.m. 59.54 16.33 26.00 0.00 04Dec2017 7 p.m. 57.20 21.92 20.00 0.00 04Dec2017 8 p.m. 55.04 20.47 23.00 0.00 04Dec2017 9 p.m. 53.12 22.89 27.33 0.00 04Dec2017 10 p.m. 49.34 22.89 36.00 0.00 04Dec2017 11 p.m. 45.50 18.34 41.00 0.00 05Dec2017 12 a.m. 44.46 16.44 42.25 0.00 05Dec2017 1 a.m. 42.84 15.27 45.50 0.00 05Dec2017 2 a.m. 42.80 14.82 46.00 0.00 05Dec2017 3 a.m. 42.56 17.00 43.33 0.00 05Dec2017 4 a.m. 41.99 17.39 32.00 0.00 05Dec2017 5 a.m. 40.82 17.56 28.00 0.00 05Dec2017 6 a.m. 38.84 14.09 32.25 0.00 05Dec2017 7 a.m. 36.95 11.18 35.50 0.00 Accuml. Values 1314.51 377.78 1002.08 2479.67 Num. Valid Values 24 24 24 24 Avg. Values 54.77 15.74 41.75 103.32 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 12.65 607.85 41.75 213.20 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5825 definition: xcompl = 1 - (RELH_avg/100) TdC = -0.1008 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 = 0.5928 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4072 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.3451 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 = 8.5905 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 14.4859 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.264 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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