Detailed Weather Data for Project: ELDR

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 6.69 9.00 78.48 0.10 31Dec2017 9 a.m. 7.45 9.40 74.75 76.90 31Dec2017 10 a.m. 8.98 10.70 66.36 117.80 31Dec2017 11 a.m. 9.84 11.40 65.35 243.80 31Dec2017 12 p.m. 11.34 12.70 65.26 447.20 31Dec2017 1 p.m. 12.00 11.30 64.30 526.70 31Dec2017 2 p.m. 12.79 13.20 60.97 565.50 31Dec2017 3 p.m. 13.71 12.00 57.60 404.10 31Dec2017 4 p.m. 14.45 12.70 56.14 261.40 31Dec2017 5 p.m. 13.77 11.40 56.89 42.00 31Dec2017 6 p.m. 12.56 9.50 59.87 0.00 31Dec2017 7 p.m. 13.15 9.00 49.50 0.00 31Dec2017 8 p.m. 10.45 11.70 67.48 0.10 31Dec2017 9 p.m. 8.94 15.30 71.26 0.00 31Dec2017 10 p.m. 7.70 12.80 75.76 0.00 31Dec2017 11 p.m. 5.74 10.20 79.71 0.00 01Jan2018 12 a.m. 4.59 9.10 82.25 0.00 01Jan2018 1 a.m. 3.22 7.90 85.59 0.00 01Jan2018 2 a.m. 1.85 8.20 84.63 0.00 01Jan2018 3 a.m. 0.86 7.40 80.96 0.00 01Jan2018 4 a.m. -0.13 7.30 82.78 0.00 01Jan2018 5 a.m. -0.85 7.50 83.79 0.00 01Jan2018 6 a.m. -1.03 7.30 84.37 0.00 01Jan2018 7 a.m. -1.97 6.90 82.93 0.00 Accuml. Values 176.11 243.90 1716.98 2685.60 Num. Valid Values 24 24 24 24 Avg. Values 7.34 10.16 71.54 111.90 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -13.70 392.44 71.54 230.91 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2846 definition: xcompl = 1 - (RELH_avg/100) TdC = -17.7178 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 = 0.2095 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7905 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.8001 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 = 0.6076 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.0049 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.038 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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