Detailed Weather Data for Project: ELDR

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 29.57 5.10 88.40 0.00 29Dec2017 9 a.m. 30.81 9.20 86.11 3.70 29Dec2017 10 a.m. 33.39 11.90 84.64 28.50 29Dec2017 11 a.m. 34.93 10.50 83.81 50.50 29Dec2017 12 p.m. 36.12 8.80 83.50 71.50 29Dec2017 1 p.m. 37.26 6.10 81.47 91.20 29Dec2017 2 p.m. 37.98 6.90 80.19 111.30 29Dec2017 3 p.m. 38.14 4.60 80.44 68.40 29Dec2017 4 p.m. 38.46 4.60 79.48 49.50 29Dec2017 5 p.m. 38.70 3.10 78.71 13.70 29Dec2017 6 p.m. 38.57 3.20 78.37 0.00 29Dec2017 7 p.m. 16.97 13.20 64.40 0.00 29Dec2017 8 p.m. 36.18 2.40 84.70 0.00 29Dec2017 9 p.m. 35.49 4.20 86.98 0.00 29Dec2017 10 p.m. 35.37 7.10 84.56 0.00 29Dec2017 11 p.m. 31.60 9.10 90.55 0.00 30Dec2017 12 a.m. 26.80 9.50 96.56 0.00 30Dec2017 1 a.m. 23.70 9.90 96.00 0.00 30Dec2017 2 a.m. 21.87 11.20 93.69 0.00 30Dec2017 3 a.m. 20.26 13.60 89.07 0.00 30Dec2017 4 a.m. 18.72 12.80 86.89 0.00 30Dec2017 5 a.m. 17.49 13.40 84.97 0.00 30Dec2017 6 a.m. 16.27 14.30 83.82 0.00 30Dec2017 7 a.m. 14.13 13.50 85.11 0.00 Accuml. Values 708.76 208.20 2032.42 488.30 Num. Valid Values 24 24 24 24 Avg. Values 29.53 8.67 84.68 20.35 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -1.37 334.99 84.68 41.98 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1532 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.6313 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 = 0.3825 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6175 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.6722 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 = 0.8587 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.2169 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.019 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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