Detailed Weather Data for Project: WDMA

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 64.83 7.20 78.74 0.00 04Dec2017 9 a.m. 65.37 5.00 79.82 19.90 04Dec2017 10 a.m. 66.94 6.50 78.64 40.50 04Dec2017 11 a.m. 68.72 7.40 75.58 114.90 04Dec2017 12 p.m. 70.47 6.20 72.37 80.90 04Dec2017 1 p.m. 70.97 6.30 71.64 31.10 04Dec2017 2 p.m. 72.12 8.20 69.89 91.10 04Dec2017 3 p.m. 74.01 10.40 66.61 291.30 04Dec2017 4 p.m. 73.47 7.60 68.21 78.30 04Dec2017 5 p.m. 73.26 5.50 68.78 12.20 04Dec2017 6 p.m. 72.59 4.60 71.01 0.00 04Dec2017 7 p.m. 38.03 1.60 50.23 0.00 04Dec2017 8 p.m. 65.30 5.00 80.37 0.00 04Dec2017 9 p.m. 64.00 5.40 59.75 0.00 04Dec2017 10 p.m. 62.53 6.70 43.98 0.00 04Dec2017 11 p.m. 59.97 13.00 41.61 0.00 05Dec2017 12 a.m. 56.19 11.50 44.92 0.00 05Dec2017 1 a.m. 53.42 9.70 42.59 0.00 05Dec2017 2 a.m. 50.97 9.00 42.10 0.00 05Dec2017 3 a.m. 48.87 6.00 46.03 0.00 05Dec2017 4 a.m. 47.89 8.10 49.67 0.00 05Dec2017 5 a.m. 46.27 7.90 51.26 0.00 05Dec2017 6 a.m. 45.21 10.20 53.30 0.00 05Dec2017 7 a.m. 43.86 11.20 54.06 0.00 Accuml. Values 1455.28 180.20 1461.16 760.20 Num. Valid Values 24 24 24 24 Avg. Values 60.64 7.51 60.88 31.68 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.91 289.94 60.88 65.36 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3912 definition: xcompl = 1 - (RELH_avg/100) TdC = 8.4420 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 = 0.6365 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3635 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2900 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 = 7.0241 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.0090 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.093 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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