Detailed Weather Data for Project: HUDS

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 49.17 2.60 57.46 72.30 03Mar2018 9 a.m. 52.20 5.00 52.54 260.90 03Mar2018 10 a.m. 55.90 4.90 48.61 433.80 03Mar2018 11 a.m. 59.27 4.30 45.49 249.30 03Mar2018 12 p.m. 62.82 4.90 42.07 29.90 03Mar2018 1 p.m. 65.19 4.80 39.31 31.20 03Mar2018 2 p.m. 67.08 5.60 37.79 20.60 03Mar2018 3 p.m. 67.87 7.00 37.68 21.10 03Mar2018 4 p.m. 68.13 6.10 38.10 20.80 03Mar2018 5 p.m. 68.00 4.90 38.98 14.60 03Mar2018 6 p.m. 66.18 5.70 40.95 4.50 03Mar2018 7 p.m. 56.88 6.20 65.00 0.00 03Mar2018 8 p.m. 61.05 4.90 45.14 0.00 03Mar2018 9 p.m. 59.79 5.60 44.43 0.00 03Mar2018 10 p.m. 58.51 6.20 42.66 0.00 03Mar2018 11 p.m. 56.95 4.30 43.96 0.00 04Mar2018 12 a.m. 55.67 4.40 45.82 0.00 04Mar2018 1 a.m. 54.99 3.90 46.66 0.00 04Mar2018 2 a.m. 55.17 4.10 46.94 0.00 04Mar2018 3 a.m. 55.58 2.70 47.09 0.00 04Mar2018 4 a.m. 55.31 4.10 48.04 0.00 04Mar2018 5 a.m. 55.44 3.80 47.84 0.00 04Mar2018 6 a.m. 55.26 3.40 49.09 0.00 04Mar2018 7 a.m. 56.30 4.20 47.91 0.00 Accuml. Values 1418.70 113.60 1099.56 1159.00 Num. Valid Values 24 24 24 24 Avg. Values 59.11 4.73 45.82 48.29 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.06 182.78 45.82 99.65 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5418 definition: xcompl = 1 - (RELH_avg/100) TdC = 3.4311 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 = 0.6254 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3746 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.0887 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 = 9.3179 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.7726 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.102 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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