Detailed Weather Data for Project: ELDR

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 67.59 8.00 81.50 0.00 04Dec2017 9 a.m. 67.57 9.40 81.33 37.40 04Dec2017 10 a.m. 68.20 7.30 79.30 176.00 04Dec2017 11 a.m. 70.02 7.30 68.59 226.00 04Dec2017 12 p.m. 70.25 9.70 58.49 192.70 04Dec2017 1 p.m. 66.51 17.30 49.81 247.70 04Dec2017 2 p.m. 62.53 21.60 41.32 285.60 04Dec2017 3 p.m. 65.73 20.20 38.33 348.60 04Dec2017 4 p.m. 65.10 24.80 29.87 212.60 04Dec2017 5 p.m. 59.99 26.10 33.52 30.60 04Dec2017 6 p.m. 54.55 20.30 44.48 0.00 04Dec2017 7 p.m. 43.81 4.00 31.62 0.00 04Dec2017 8 p.m. 47.01 20.40 46.05 0.00 04Dec2017 9 p.m. 44.04 15.30 51.83 0.00 04Dec2017 10 p.m. 41.67 14.00 53.13 0.00 04Dec2017 11 p.m. 39.56 14.70 43.80 0.00 05Dec2017 12 a.m. 36.75 11.70 42.34 0.00 05Dec2017 1 a.m. 34.52 8.60 43.85 0.00 05Dec2017 2 a.m. 32.94 7.50 47.44 0.00 05Dec2017 3 a.m. 31.78 6.90 50.34 0.00 05Dec2017 4 a.m. 30.90 7.20 50.49 0.00 05Dec2017 5 a.m. 30.87 7.10 47.51 0.00 05Dec2017 6 a.m. 31.01 7.60 45.66 0.00 05Dec2017 7 a.m. 31.28 7.70 44.36 0.00 Accuml. Values 1194.17 304.70 1204.96 1757.20 Num. Valid Values 24 24 24 24 Avg. Values 49.76 12.70 50.21 73.22 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 9.87 490.26 50.21 151.08 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4979 definition: xcompl = 1 - (RELH_avg/100) TdC = -0.0342 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 = 0.5533 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4467 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.5433 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 = 6.0900 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 9.0302 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.171 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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