Detailed Weather Data for Project: HUDS

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 56.80 4.60 47.96 0.60 04Mar2018 9 a.m. 56.44 4.50 50.15 25.70 04Mar2018 10 a.m. 57.40 5.50 50.01 86.30 04Mar2018 11 a.m. 58.57 6.40 49.35 125.70 04Mar2018 12 p.m. 58.66 6.40 50.67 90.10 04Mar2018 1 p.m. 58.53 6.30 53.53 81.80 04Mar2018 2 p.m. 58.48 7.00 54.00 69.20 04Mar2018 3 p.m. 57.67 6.50 55.91 29.60 04Mar2018 4 p.m. 57.42 6.50 58.14 10.50 04Mar2018 5 p.m. 56.97 6.50 61.30 14.10 04Mar2018 6 p.m. 56.73 6.10 63.64 0.00 04Mar2018 7 p.m. 56.61 5.80 25.72 0.00 04Mar2018 8 p.m. 56.84 5.00 67.41 0.00 04Mar2018 9 p.m. 56.10 6.10 75.30 0.00 04Mar2018 10 p.m. 55.96 6.10 75.07 0.00 04Mar2018 11 p.m. 55.67 6.20 73.03 0.00 05Mar2018 12 a.m. 56.25 4.60 70.36 0.00 05Mar2018 1 a.m. 57.06 2.90 69.08 0.00 05Mar2018 2 a.m. 58.03 3.10 69.52 0.00 05Mar2018 3 a.m. 59.36 3.20 72.06 0.00 05Mar2018 4 a.m. 59.90 3.20 74.93 0.00 05Mar2018 5 a.m. 60.75 3.90 77.68 0.00 05Mar2018 6 a.m. 61.61 2.50 79.61 0.00 05Mar2018 7 a.m. 62.53 2.10 82.04 0.00 Accuml. Values 1390.31 121.00 1506.47 533.60 Num. Valid Values 24 24 24 24 Avg. Values 57.93 5.04 62.77 22.23 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 14.41 194.69 62.77 45.88 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3723 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.4691 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 = 0.6167 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3833 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.5250 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 = 6.0686 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.8126 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.060 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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