Detailed Weather Data for Project: HUDS

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 41.29 0.90 46.66 101.00 06Mar2018 9 a.m. 45.70 4.40 37.07 299.30 06Mar2018 10 a.m. 49.06 8.50 29.81 479.50 06Mar2018 11 a.m. 51.58 10.60 25.93 615.60 06Mar2018 12 p.m. 53.06 13.10 23.43 704.90 06Mar2018 1 p.m. 54.70 13.60 21.70 661.00 06Mar2018 2 p.m. 55.85 18.20 19.56 69.30 06Mar2018 3 p.m. 55.36 20.80 19.73 50.80 06Mar2018 4 p.m. 54.95 19.70 21.42 108.20 06Mar2018 5 p.m. 52.45 16.40 27.07 68.00 06Mar2018 6 p.m. 47.68 14.80 37.59 15.80 06Mar2018 7 p.m. 49.57 4.10 32.02 0.00 06Mar2018 8 p.m. 41.50 10.50 45.93 0.00 06Mar2018 9 p.m. 40.14 9.40 47.82 0.00 06Mar2018 10 p.m. 38.82 7.80 49.98 0.00 06Mar2018 11 p.m. 37.35 9.30 53.38 0.00 07Mar2018 12 a.m. 36.32 6.70 55.99 0.00 07Mar2018 1 a.m. 34.95 5.80 59.84 0.00 07Mar2018 2 a.m. 34.47 5.40 63.72 0.00 07Mar2018 3 a.m. 34.38 6.80 62.90 0.00 07Mar2018 4 a.m. 33.87 6.50 65.52 0.00 07Mar2018 5 a.m. 33.42 6.30 68.20 0.00 07Mar2018 6 a.m. 33.24 5.80 68.89 0.00 07Mar2018 7 a.m. 33.58 5.90 67.66 0.00 Accuml. Values 1043.29 231.30 1051.82 3173.40 Num. Valid Values 24 24 24 24 Avg. Values 43.47 9.64 43.83 132.22 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.37 372.16 43.83 272.85 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5617 definition: xcompl = 1 - (RELH_avg/100) TdC = -5.1347 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 = 0.5014 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4986 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.7756 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 = 5.4461 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.6625 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.166 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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