Detailed Weather Data for Project: HUDS

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 28.49 9.90 88.74 0.00 30Dec2017 9 a.m. 27.81 8.10 88.95 0.00 30Dec2017 10 a.m. 27.03 8.20 85.11 2.00 30Dec2017 11 a.m. 25.50 9.40 84.69 21.00 30Dec2017 12 p.m. 25.12 8.50 85.29 44.10 30Dec2017 1 p.m. 25.00 8.10 80.42 50.60 30Dec2017 2 p.m. 24.93 7.30 75.59 51.10 30Dec2017 3 p.m. 25.16 7.00 72.88 40.80 30Dec2017 4 p.m. 25.43 7.00 71.98 25.10 30Dec2017 5 p.m. 25.63 5.80 70.34 3.10 30Dec2017 6 p.m. 25.54 6.70 69.43 0.00 30Dec2017 7 p.m. 18.39 10.20 53.17 0.00 30Dec2017 8 p.m. 26.19 8.00 68.61 0.00 30Dec2017 9 p.m. 26.67 7.10 71.77 0.00 30Dec2017 10 p.m. 26.64 7.30 70.81 0.00 30Dec2017 11 p.m. 26.58 6.00 69.90 0.00 31Dec2017 12 a.m. 26.67 5.10 68.76 0.00 31Dec2017 1 a.m. 24.60 6.80 61.76 0.00 31Dec2017 2 a.m. 22.84 8.50 61.92 0.00 31Dec2017 3 a.m. 20.43 9.70 66.00 0.00 31Dec2017 4 a.m. 18.07 9.60 72.44 0.00 31Dec2017 5 a.m. 17.73 11.20 73.99 0.00 31Dec2017 6 a.m. 17.10 9.60 73.75 0.00 31Dec2017 7 a.m. 16.77 10.30 71.99 0.00 Accuml. Values 574.30 195.40 1758.29 237.80 Num. Valid Values 24 24 24 24 Avg. Values 23.93 8.14 73.26 9.91 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -4.48 314.40 73.26 20.45 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2674 definition: xcompl = 1 - (RELH_avg/100) TdC = -8.5250 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 = 0.3354 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6646 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.8589 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 = 1.1776 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.5378 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.029 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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