Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 32.13 11.24 89.75 1.00 29Dec2017 9 a.m. 32.66 12.00 87.00 14.67 29Dec2017 10 a.m. 33.98 12.25 84.00 50.00 29Dec2017 11 a.m. 35.12 12.08 82.67 96.33 29Dec2017 12 p.m. 36.99 14.99 77.00 214.50 29Dec2017 1 p.m. 40.04 12.90 70.67 387.00 29Dec2017 2 p.m. 43.97 12.14 61.50 543.75 29Dec2017 3 p.m. 46.62 11.91 56.75 464.75 29Dec2017 4 p.m. 48.83 8.84 53.00 333.50 29Dec2017 5 p.m. 48.69 8.89 54.75 162.50 29Dec2017 6 p.m. 38.30 3.58 75.00 0.00 29Dec2017 7 p.m. 35.78 7.83 81.00 0.00 29Dec2017 8 p.m. 34.79 7.94 88.50 0.00 29Dec2017 9 p.m. 32.84 8.13 96.00 0.00 29Dec2017 10 p.m. 33.08 8.57 97.00 0.00 29Dec2017 11 p.m. 31.82 7.16 98.00 0.00 30Dec2017 12 a.m. 31.37 8.28 98.75 0.00 30Dec2017 1 a.m. 32.27 9.00 98.75 0.00 30Dec2017 2 a.m. 33.12 10.01 98.75 0.00 30Dec2017 3 a.m. 31.22 16.03 94.33 0.00 30Dec2017 4 a.m. 28.22 17.28 90.00 0.00 30Dec2017 5 a.m. 26.51 17.45 88.00 0.00 30Dec2017 6 a.m. 24.80 14.65 87.00 0.00 30Dec2017 7 a.m. 23.27 17.34 90.00 0.00 Accuml. Values 836.42 270.49 1998.17 2268.00 Num. Valid Values 24 24 24 24 Avg. Values 34.85 11.27 83.26 94.50 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 1.58 435.22 83.26 195.00 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1674 definition: xcompl = 1 - (RELH_avg/100) TdC = -0.9568 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 = 0.4280 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5720 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.7814 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 = 1.1581 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.9141 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.056 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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