Detailed Weather Data for Project: ELDR

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. 42.19 2.70 91.97 7.10 02Dec2017 9 a.m. 44.53 2.40 88.94 126.10 02Dec2017 10 a.m. 46.17 3.90 86.42 271.00 02Dec2017 11 a.m. 50.36 4.00 78.83 388.00 02Dec2017 12 p.m. 56.19 2.90 66.32 458.10 02Dec2017 1 p.m. 61.59 1.90 55.76 477.20 02Dec2017 2 p.m. 65.17 1.20 48.82 440.40 02Dec2017 3 p.m. 67.12 1.00 44.56 346.60 02Dec2017 4 p.m. 64.20 3.60 51.09 215.30 02Dec2017 5 p.m. 61.92 5.90 57.41 65.00 02Dec2017 6 p.m. 59.23 4.80 64.05 0.00 02Dec2017 7 p.m. 64.69 13.40 74.39 0.00 02Dec2017 8 p.m. 53.69 5.50 77.66 0.00 02Dec2017 9 p.m. 52.68 7.40 74.60 0.00 02Dec2017 10 p.m. 51.91 4.00 77.18 0.00 02Dec2017 11 p.m. 50.52 1.40 81.99 0.00 03Dec2017 12 a.m. 49.73 2.40 90.66 0.00 03Dec2017 1 a.m. 48.79 1.90 89.48 0.00 03Dec2017 2 a.m. 48.07 2.50 90.53 0.00 03Dec2017 3 a.m. 47.97 3.30 91.32 0.00 03Dec2017 4 a.m. 49.10 3.60 89.12 0.00 03Dec2017 5 a.m. 49.03 3.70 88.11 0.00 03Dec2017 6 a.m. 49.10 2.70 87.04 0.00 03Dec2017 7 a.m. 49.95 3.10 86.90 0.00 Accuml. Values 1283.90 89.20 1833.15 2794.80 Num. Valid Values 24 24 24 24 Avg. Values 53.50 3.72 76.38 116.45 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 11.94 143.52 76.38 240.30 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2362 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.9568 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 = 0.5829 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4171 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.6395 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 = 3.2786 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.3775 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.077 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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