Detailed Weather Data for Project: HUDS

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. 43.09 6.10 81.48 3.20 08Nov2017 9 a.m. 42.62 6.20 81.13 34.30 08Nov2017 10 a.m. 43.45 6.20 78.29 117.00 08Nov2017 11 a.m. 45.72 7.20 73.83 177.70 08Nov2017 12 p.m. 47.64 4.80 66.91 182.20 08Nov2017 1 p.m. 49.42 3.80 63.16 271.70 08Nov2017 2 p.m. 51.48 5.20 56.70 100.80 08Nov2017 3 p.m. 53.42 4.40 50.71 63.90 08Nov2017 4 p.m. 54.68 4.80 46.05 9.40 08Nov2017 5 p.m. 55.47 3.90 43.14 0.30 08Nov2017 6 p.m. 53.28 2.80 50.51 0.00 08Nov2017 7 p.m. 53.31 1.00 70.35 0.00 08Nov2017 8 p.m. 46.13 1.20 78.65 0.00 08Nov2017 9 p.m. 44.01 0.60 80.18 0.00 08Nov2017 10 p.m. 41.68 1.70 88.51 0.00 08Nov2017 11 p.m. 40.08 2.40 83.38 0.00 09Nov2017 12 a.m. 38.97 1.70 85.12 0.00 09Nov2017 1 a.m. 38.43 1.00 88.18 0.00 09Nov2017 2 a.m. 37.09 1.90 90.01 0.00 09Nov2017 3 a.m. 36.21 2.70 88.23 0.00 09Nov2017 4 a.m. 36.59 1.10 90.86 0.00 09Nov2017 5 a.m. 35.69 2.90 94.21 0.00 09Nov2017 6 a.m. 35.17 1.40 96.42 0.00 09Nov2017 7 a.m. 35.17 1.70 93.57 0.00 Accuml. Values 1058.79 76.70 1819.58 960.50 Num. Valid Values 24 24 24 24 Avg. Values 44.12 3.20 75.82 40.02 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.73 123.41 75.82 82.58 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2418 definition: xcompl = 1 - (RELH_avg/100) TdC = 2.7931 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 = 0.5068 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4932 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2310 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 = 2.3739 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.6646 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.028 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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