Detailed Weather Data for Project: HUDS

Date Time TAIR WSPD RELH SRAD 06Nov2017 8 a.m. 52.92 5.50 83.96 34.80 06Nov2017 9 a.m. 54.12 7.00 81.75 64.60 06Nov2017 10 a.m. 54.97 6.00 80.73 38.70 06Nov2017 11 a.m. 53.64 5.40 90.36 53.60 06Nov2017 12 p.m. 50.47 5.70 92.78 72.80 06Nov2017 1 p.m. 50.22 4.40 93.61 59.90 06Nov2017 2 p.m. 49.93 4.50 94.44 69.80 06Nov2017 3 p.m. 49.15 6.70 94.71 29.90 06Nov2017 4 p.m. 47.30 6.50 94.68 21.60 06Nov2017 5 p.m. 46.15 5.90 95.15 1.20 06Nov2017 6 p.m. 45.50 6.60 95.21 0.00 06Nov2017 7 p.m. 45.09 7.80 86.35 0.00 06Nov2017 8 p.m. 44.29 6.20 95.92 0.00 06Nov2017 9 p.m. 44.31 5.60 96.41 0.00 06Nov2017 10 p.m. 44.64 5.20 96.40 0.00 06Nov2017 11 p.m. 44.51 6.60 96.11 0.00 07Nov2017 12 a.m. 44.17 6.10 96.27 0.00 07Nov2017 1 a.m. 44.38 5.90 96.67 0.00 07Nov2017 2 a.m. 44.76 4.10 96.47 0.00 07Nov2017 3 a.m. 45.90 4.70 95.48 0.00 07Nov2017 4 a.m. 45.59 5.30 95.21 0.00 07Nov2017 5 a.m. 44.91 6.20 96.31 0.00 07Nov2017 6 a.m. 44.92 6.70 95.94 0.00 07Nov2017 7 a.m. 44.83 6.10 95.36 0.00 Accuml. Values 1136.66 140.70 2236.28 446.90 Num. Valid Values 24 24 24 24 Avg. Values 47.36 5.86 93.18 18.62 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 8.53 226.39 93.18 38.42 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.0682 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.4695 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 = 0.5338 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4662 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.6482 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 = 0.7788 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.8640 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.002 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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