Detailed Weather Data for Project: HUDS

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 54.81 1.10 96.50 0.00 04Nov2017 9 a.m. 55.42 1.20 96.74 7.90 04Nov2017 10 a.m. 56.17 1.60 96.59 27.10 04Nov2017 11 a.m. 57.13 1.10 96.84 46.70 04Nov2017 12 p.m. 58.14 0.50 96.89 67.00 04Nov2017 1 p.m. 61.27 1.50 97.02 72.70 04Nov2017 2 p.m. 64.99 1.90 93.16 141.40 04Nov2017 3 p.m. 67.32 2.50 87.57 226.30 04Nov2017 4 p.m. 70.92 2.40 78.96 102.70 04Nov2017 5 p.m. 70.38 1.80 79.58 89.70 04Nov2017 6 p.m. 67.35 3.70 85.45 33.80 04Nov2017 7 p.m. 64.62 2.00 90.77 0.00 04Nov2017 8 p.m. 56.32 7.60 77.29 0.00 04Nov2017 9 p.m. 64.26 3.40 92.61 0.00 04Nov2017 10 p.m. 63.82 1.10 93.09 0.00 04Nov2017 11 p.m. 62.46 0.90 94.75 0.00 05Nov2017 12 a.m. 73.22 1.70 79.93 0.00 05Nov2017 1 a.m. 73.53 1.90 78.44 0.00 05Nov2017 2 a.m. 73.56 1.70 77.57 0.00 05Nov2017 3 a.m. 73.24 1.50 78.21 0.00 05Nov2017 4 a.m. 73.00 1.10 79.27 0.00 05Nov2017 5 a.m. 72.66 1.10 80.42 0.00 05Nov2017 6 a.m. 72.63 2.20 80.95 0.00 05Nov2017 7 a.m. 72.84 1.90 81.17 0.00 Accuml. Values 1580.03 47.40 2089.77 815.30 Num. Valid Values 24 24 24 24 Avg. Values 65.83 1.98 87.07 33.97 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 18.80 76.27 87.07 70.10 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1293 definition: xcompl = 1 - (RELH_avg/100) TdC = 16.6000 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 = 0.6725 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3275 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.1924 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 = 2.8037 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.5885 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.015 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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