Detailed Weather Data for Project: ELDR

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 31.33 9.10 43.37 1.20 05Dec2017 9 a.m. 31.37 8.80 42.14 48.30 05Dec2017 10 a.m. 34.16 10.60 35.89 196.10 05Dec2017 11 a.m. 38.55 13.10 32.69 312.00 05Dec2017 12 p.m. 43.27 12.80 26.96 503.80 05Dec2017 1 p.m. 46.18 13.40 23.07 543.90 05Dec2017 2 p.m. 48.27 13.70 20.38 487.30 05Dec2017 3 p.m. 49.17 15.00 20.87 352.90 05Dec2017 4 p.m. 49.69 15.50 22.30 236.90 05Dec2017 5 p.m. 49.06 8.40 22.84 80.80 05Dec2017 6 p.m. 46.04 3.60 26.45 0.00 05Dec2017 7 p.m. 42.96 7.10 42.74 0.00 05Dec2017 8 p.m. 42.89 6.10 34.12 0.00 05Dec2017 9 p.m. 40.86 6.50 38.11 0.00 05Dec2017 10 p.m. 39.16 4.70 42.06 0.00 05Dec2017 11 p.m. 37.71 3.90 45.72 0.00 06Dec2017 12 a.m. 37.42 3.70 45.12 0.00 06Dec2017 1 a.m. 35.44 2.20 51.29 0.00 06Dec2017 2 a.m. 32.58 2.00 58.48 0.00 06Dec2017 3 a.m. 32.74 2.50 56.49 0.00 06Dec2017 4 a.m. 30.94 3.20 61.39 0.00 06Dec2017 5 a.m. 31.66 7.30 57.21 0.00 06Dec2017 6 a.m. 31.53 7.50 56.86 0.00 06Dec2017 7 a.m. 30.94 6.50 58.64 0.00 Accuml. Values 933.92 187.20 965.19 2763.20 Num. Valid Values 24 24 24 24 Avg. Values 38.91 7.80 40.22 115.13 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.84 301.20 40.22 237.58 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5978 definition: xcompl = 1 - (RELH_avg/100) TdC = -8.5792 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 = 0.4628 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5372 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.2896 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 = 4.8686 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.2081 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.134 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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