Detailed Weather Data for Project: ELDR

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 30.85 11.30 60.12 4.10 06Dec2017 9 a.m. 34.43 13.50 57.71 129.60 06Dec2017 10 a.m. 39.43 11.60 53.03 254.20 06Dec2017 11 a.m. 44.11 12.20 48.11 345.40 06Dec2017 12 p.m. 47.17 15.10 45.25 480.00 06Dec2017 1 p.m. 49.28 16.40 38.26 511.40 06Dec2017 2 p.m. 49.69 15.90 32.00 475.70 06Dec2017 3 p.m. 49.59 17.20 31.45 387.90 06Dec2017 4 p.m. 49.42 12.80 31.17 238.90 06Dec2017 5 p.m. 48.58 10.80 33.80 84.20 06Dec2017 6 p.m. 46.08 8.60 35.96 0.00 06Dec2017 7 p.m. 27.52 3.60 41.14 0.00 06Dec2017 8 p.m. 39.83 7.70 46.44 0.00 06Dec2017 9 p.m. 38.91 7.50 61.94 0.00 06Dec2017 10 p.m. 36.86 6.60 68.90 0.00 06Dec2017 11 p.m. 35.15 10.50 64.44 0.00 07Dec2017 12 a.m. 32.47 10.50 59.87 0.00 07Dec2017 1 a.m. 29.93 9.00 61.82 0.00 07Dec2017 2 a.m. 27.39 7.80 66.73 0.00 07Dec2017 3 a.m. 25.59 8.10 70.17 0.00 07Dec2017 4 a.m. 23.65 9.10 74.00 0.00 07Dec2017 5 a.m. 22.12 10.30 77.02 0.00 07Dec2017 6 a.m. 20.80 9.60 79.15 0.00 07Dec2017 7 a.m. 20.07 11.70 80.07 0.00 Accuml. Values 868.93 257.40 1318.55 2911.40 Num. Valid Values 24 24 24 24 Avg. Values 36.21 10.73 54.94 121.31 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 2.34 414.16 54.94 250.32 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4506 definition: xcompl = 1 - (RELH_avg/100) TdC = -5.7981 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 = 0.4396 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5604 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.3720 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 = 3.2798 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.6105 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.125 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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