Detailed Weather Data for Project: HUDS

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 62.51 3.30 83.18 21.20 05Mar2018 9 a.m. 58.05 12.30 71.08 159.20 05Mar2018 10 a.m. 54.05 12.90 55.54 447.50 05Mar2018 11 a.m. 56.77 15.00 42.86 237.20 05Mar2018 12 p.m. 57.02 14.10 40.87 22.20 05Mar2018 1 p.m. 57.04 13.40 37.41 22.80 05Mar2018 2 p.m. 58.08 13.80 31.59 20.60 05Mar2018 3 p.m. 59.36 10.90 22.59 299.10 05Mar2018 4 p.m. 60.40 8.30 19.84 480.60 05Mar2018 5 p.m. 60.44 9.90 18.14 189.20 05Mar2018 6 p.m. 59.32 9.10 19.69 18.00 05Mar2018 7 p.m. 44.08 16.60 42.42 0.00 05Mar2018 8 p.m. 53.80 1.70 31.81 0.00 05Mar2018 9 p.m. 50.00 0.10 48.41 0.00 05Mar2018 10 p.m. 47.55 1.90 47.75 0.00 05Mar2018 11 p.m. 46.36 1.40 37.42 0.00 06Mar2018 12 a.m. 42.93 0.20 45.92 0.00 06Mar2018 1 a.m. 41.67 0.10 51.07 0.00 06Mar2018 2 a.m. 41.29 0.60 62.03 0.00 06Mar2018 3 a.m. 38.61 1.70 75.99 0.00 06Mar2018 4 a.m. 39.27 2.60 56.98 0.00 06Mar2018 5 a.m. 39.90 0.40 52.25 0.00 06Mar2018 6 a.m. 37.78 2.00 54.17 0.00 06Mar2018 7 a.m. 37.33 2.50 54.42 0.00 Accuml. Values 1203.60 154.80 1103.43 1917.60 Num. Valid Values 24 24 24 24 Avg. Values 50.15 6.45 45.98 79.90 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 10.08 249.07 45.98 164.88 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5402 definition: xcompl = 1 - (RELH_avg/100) TdC = -1.0794 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 = 0.5564 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4436 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.7012 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 = 6.7198 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.1074 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.122 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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