Detailed Weather Data for Project: HUDS

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 15.80 2.30 57.25 0.00 02Jan2018 9 a.m. 16.45 1.90 53.91 5.80 02Jan2018 10 a.m. 17.62 0.40 54.28 35.50 02Jan2018 11 a.m. 18.86 1.00 50.23 87.00 02Jan2018 12 p.m. 19.78 1.60 50.52 91.20 02Jan2018 1 p.m. 21.02 1.20 47.88 96.80 02Jan2018 2 p.m. 21.87 2.00 51.24 86.40 02Jan2018 3 p.m. 22.50 1.40 49.61 65.00 02Jan2018 4 p.m. 23.04 1.80 46.86 66.40 02Jan2018 5 p.m. 23.76 0.70 45.27 24.70 02Jan2018 6 p.m. 23.32 1.20 45.38 0.00 02Jan2018 7 p.m. 31.10 0.20 57.26 0.00 02Jan2018 8 p.m. 21.04 0.60 51.72 0.00 02Jan2018 9 p.m. 19.13 1.10 56.98 0.00 02Jan2018 10 p.m. 18.70 0.20 59.01 0.00 02Jan2018 11 p.m. 18.14 0.30 66.75 0.00 03Jan2018 12 a.m. 18.16 0.70 62.93 0.00 03Jan2018 1 a.m. 18.30 0.70 62.00 0.00 03Jan2018 2 a.m. 17.37 0.90 63.07 0.00 03Jan2018 3 a.m. 17.49 0.80 64.12 0.00 03Jan2018 4 a.m. 17.22 0.50 63.75 0.00 03Jan2018 5 a.m. 16.48 0.80 65.97 0.00 03Jan2018 6 a.m. 15.85 0.60 66.45 0.00 03Jan2018 7 a.m. 16.02 0.40 65.16 0.00 Accuml. Values 469.00 23.30 1357.60 558.80 Num. Valid Values 24 24 24 24 Avg. Values 19.54 0.97 56.57 23.28 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -6.92 37.49 56.57 48.05 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4343 definition: xcompl = 1 - (RELH_avg/100) TdC = -14.1055 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 = 0.2997 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7003 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.6470 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 = 1.5953 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.7975 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.014 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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