Detailed Weather Data for Project: JOHN

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 38.97 14.70 81.74 4.40 07Nov2017 9 a.m. 38.93 13.40 81.04 57.10 07Nov2017 10 a.m. 40.03 14.00 77.09 320.60 07Nov2017 11 a.m. 42.06 12.60 71.87 406.00 07Nov2017 12 p.m. 43.59 11.90 68.37 182.10 07Nov2017 1 p.m. 43.47 15.20 68.55 116.40 07Nov2017 2 p.m. 41.86 16.90 71.35 85.90 07Nov2017 3 p.m. 42.33 17.70 70.13 38.60 07Nov2017 4 p.m. 43.16 15.00 63.95 23.30 07Nov2017 5 p.m. 43.75 13.20 58.13 0.00 07Nov2017 6 p.m. 43.30 13.60 54.90 0.00 07Nov2017 7 p.m. 46.15 2.70 43.13 0.00 07Nov2017 8 p.m. 41.94 8.90 50.89 0.00 07Nov2017 9 p.m. 41.09 7.30 51.62 0.00 07Nov2017 10 p.m. 39.70 6.80 58.42 0.00 07Nov2017 11 p.m. 37.96 7.60 61.93 0.00 08Nov2017 12 a.m. 36.16 8.30 65.37 0.00 08Nov2017 1 a.m. 34.81 9.50 68.06 0.00 08Nov2017 2 a.m. 33.85 9.10 70.21 0.00 08Nov2017 3 a.m. 33.24 7.60 72.70 0.00 08Nov2017 4 a.m. 32.90 6.30 75.74 0.00 08Nov2017 5 a.m. 32.13 7.80 81.31 0.00 08Nov2017 6 a.m. 31.53 7.00 87.63 0.00 08Nov2017 7 a.m. 31.30 8.00 90.90 0.00 Accuml. Values 934.21 255.10 1645.03 1234.40 Num. Valid Values 24 24 24 24 Avg. Values 38.93 10.63 68.54 51.43 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.85 410.46 68.54 106.13 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3146 definition: xcompl = 1 - (RELH_avg/100) TdC = -1.3698 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 = 0.4629 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5371 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.0427 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 = 2.5297 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.6443 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.076 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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