Detailed Weather Data for Project: ALTU

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 43.52 11.58 68.25 28.25 07Nov2017 9 a.m. 44.06 12.45 63.00 120.67 07Nov2017 10 a.m. 45.36 13.53 56.75 231.25 07Nov2017 11 a.m. 47.54 13.12 47.00 272.33 07Nov2017 12 p.m. 49.14 15.27 42.75 352.25 07Nov2017 1 p.m. 49.22 16.78 41.67 286.00 07Nov2017 2 p.m. 49.32 16.27 43.75 354.25 07Nov2017 3 p.m. 48.56 14.76 47.75 284.50 07Nov2017 4 p.m. 48.29 13.31 48.25 185.00 07Nov2017 5 p.m. 48.42 10.63 48.00 80.75 07Nov2017 6 p.m. 47.66 12.53 42.00 0.00 07Nov2017 7 p.m. 46.58 14.32 42.00 0.00 07Nov2017 8 p.m. 44.87 15.21 43.50 0.00 07Nov2017 9 p.m. 42.92 13.94 46.33 0.00 07Nov2017 10 p.m. 41.40 13.48 50.00 0.00 07Nov2017 11 p.m. 40.55 12.64 52.75 0.00 08Nov2017 12 a.m. 40.64 10.57 53.50 0.00 08Nov2017 1 a.m. 40.28 10.29 55.50 0.00 08Nov2017 2 a.m. 40.37 10.18 54.50 0.00 08Nov2017 3 a.m. 39.38 7.83 63.67 0.00 08Nov2017 4 a.m. 37.85 6.77 78.25 0.00 08Nov2017 5 a.m. 36.41 8.95 87.50 0.00 08Nov2017 6 a.m. 35.42 10.23 94.50 0.00 08Nov2017 7 a.m. 35.33 9.73 94.00 0.00 Accuml. Values 1043.09 294.37 1365.17 2195.25 Num. Valid Values 24 24 24 24 Avg. Values 43.46 12.27 56.88 91.47 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.37 473.64 56.88 188.75 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4312 definition: xcompl = 1 - (RELH_avg/100) TdC = -1.5397 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 = 0.5014 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4986 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.8512 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 = 4.1486 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.2729 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.140 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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