Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. 35.60 10.96 92.75 11.25 08Nov2017 9 a.m. 36.68 11.26 87.67 47.33 08Nov2017 10 a.m. 38.12 9.73 81.50 83.50 08Nov2017 11 a.m. 39.44 9.69 77.33 110.33 08Nov2017 12 p.m. 41.58 10.79 71.50 184.50 08Nov2017 1 p.m. 42.44 10.66 66.67 131.00 08Nov2017 2 p.m. 43.92 9.90 63.75 132.50 08Nov2017 3 p.m. 45.05 6.04 61.75 167.50 08Nov2017 4 p.m. 45.72 4.42 60.00 130.50 08Nov2017 5 p.m. 45.95 2.74 59.25 76.75 08Nov2017 6 p.m. 43.70 2.24 68.00 0.00 08Nov2017 7 p.m. 36.86 0.67 86.00 0.00 08Nov2017 8 p.m. 34.34 2.68 90.50 0.00 08Nov2017 9 p.m. 32.06 3.36 93.67 0.00 08Nov2017 10 p.m. 31.10 3.06 94.33 0.00 08Nov2017 11 p.m. 28.94 0.89 95.00 0.00 09Nov2017 12 a.m. 29.75 3.63 96.50 0.00 09Nov2017 1 a.m. 29.44 2.29 93.75 0.00 09Nov2017 2 a.m. 28.99 2.35 97.50 0.00 09Nov2017 3 a.m. 27.08 0.97 97.67 0.00 09Nov2017 4 a.m. 26.42 2.91 97.75 0.00 09Nov2017 5 a.m. 26.06 4.14 97.50 0.00 09Nov2017 6 a.m. 26.20 2.13 96.75 0.00 09Nov2017 7 a.m. 25.16 0.22 96.00 1.00 Accuml. Values 840.60 117.73 2023.09 1076.16 Num. Valid Values 24 24 24 24 Avg. Values 35.02 4.91 84.30 44.84 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 1.68 189.43 84.30 92.53 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1570 definition: xcompl = 1 - (RELH_avg/100) TdC = -0.6959 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 = 0.4295 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5705 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2007 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 = 1.0956 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.0504 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.020 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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