Detailed Weather Data for Project: HUDS

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 64.08 2.80 83.12 0.20 04Dec2017 9 a.m. 65.57 2.40 81.19 15.50 04Dec2017 10 a.m. 66.60 2.30 79.72 29.40 04Dec2017 11 a.m. 67.80 2.60 77.89 74.10 04Dec2017 12 p.m. 69.69 2.70 74.49 105.90 04Dec2017 1 p.m. 72.25 4.30 68.99 120.40 04Dec2017 2 p.m. 73.65 3.10 65.33 76.70 04Dec2017 3 p.m. 74.66 4.80 62.34 78.50 04Dec2017 4 p.m. 74.44 2.90 63.07 49.80 04Dec2017 5 p.m. 72.97 3.30 67.75 12.80 04Dec2017 6 p.m. 68.65 12.00 49.74 0.00 04Dec2017 7 p.m. 38.82 0.30 45.56 0.00 04Dec2017 8 p.m. 62.73 8.80 37.57 0.00 04Dec2017 9 p.m. 58.82 12.90 37.75 0.00 04Dec2017 10 p.m. 53.49 13.00 40.97 0.00 04Dec2017 11 p.m. 50.29 9.50 42.96 0.00 05Dec2017 12 a.m. 47.48 9.50 42.57 0.00 05Dec2017 1 a.m. 44.87 7.40 47.55 0.00 05Dec2017 2 a.m. 43.27 9.20 49.61 0.00 05Dec2017 3 a.m. 42.08 7.90 52.71 0.00 05Dec2017 4 a.m. 39.31 8.30 56.92 0.00 05Dec2017 5 a.m. 36.97 8.70 54.13 0.00 05Dec2017 6 a.m. 36.37 7.10 52.32 0.00 05Dec2017 7 a.m. 35.47 7.40 48.83 0.00 Accuml. Values 1360.33 153.20 1383.08 563.30 Num. Valid Values 24 24 24 24 Avg. Values 56.68 6.38 57.63 23.47 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.71 246.50 57.63 48.43 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4237 definition: xcompl = 1 - (RELH_avg/100) TdC = 5.5529 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 = 0.6073 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3927 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.5037 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 = 6.6289 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.9953 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.081 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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