Detailed Weather Data for Project: ELDR

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 12.47 11.00 86.91 0.00 30Dec2017 9 a.m. 12.13 13.30 83.16 90.20 30Dec2017 10 a.m. 13.03 14.30 79.97 272.80 30Dec2017 11 a.m. 14.00 13.80 72.37 378.70 30Dec2017 12 p.m. 15.73 12.20 66.31 479.40 30Dec2017 1 p.m. 17.11 11.60 62.40 521.40 30Dec2017 2 p.m. 18.52 9.40 58.44 498.50 30Dec2017 3 p.m. 19.26 9.00 55.48 371.60 30Dec2017 4 p.m. 19.56 7.70 54.22 181.60 30Dec2017 5 p.m. 19.22 8.80 56.15 61.30 30Dec2017 6 p.m. 17.92 11.50 58.99 0.00 30Dec2017 7 p.m. 11.50 9.10 64.99 0.00 30Dec2017 8 p.m. 15.76 11.30 69.25 0.00 30Dec2017 9 p.m. 13.48 10.00 74.08 0.00 30Dec2017 10 p.m. 12.24 9.00 73.44 0.00 30Dec2017 11 p.m. 12.36 9.90 71.78 0.00 31Dec2017 12 a.m. 12.02 13.00 72.67 0.00 31Dec2017 1 a.m. 11.79 14.30 74.37 0.10 31Dec2017 2 a.m. 10.92 11.80 74.15 0.00 31Dec2017 3 a.m. 10.58 11.60 74.15 0.00 31Dec2017 4 a.m. 9.99 9.40 75.84 0.10 31Dec2017 5 a.m. 9.41 9.20 75.57 0.00 31Dec2017 6 a.m. 8.44 8.50 76.97 0.00 31Dec2017 7 a.m. 8.20 9.20 77.33 0.00 Accuml. Values 325.63 258.90 1688.99 2855.70 Num. Valid Values 24 24 24 24 Avg. Values 13.57 10.79 70.37 118.99 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -10.24 416.57 70.37 245.53 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2963 definition: xcompl = 1 - (RELH_avg/100) TdC = -14.5770 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 = 0.2537 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7463 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.9836 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 = 0.8363 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.3910 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.051 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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