Detailed Weather Data for Project: WDMA

Date Time TAIR WSPD RELH SRAD 08Nov2017 8 a.m. 48.90 4.90 78.78 25.70 08Nov2017 9 a.m. 49.44 3.80 77.58 71.80 08Nov2017 10 a.m. 50.05 4.30 73.97 129.80 08Nov2017 11 a.m. 50.14 5.40 71.89 103.10 08Nov2017 12 p.m. 50.54 4.60 69.12 126.20 08Nov2017 1 p.m. 51.89 2.40 67.00 211.40 08Nov2017 2 p.m. 52.72 3.20 65.34 161.90 08Nov2017 3 p.m. 53.02 2.80 64.80 106.90 08Nov2017 4 p.m. 53.35 3.20 63.50 96.50 08Nov2017 5 p.m. 53.38 2.60 62.69 31.80 08Nov2017 6 p.m. 52.32 1.70 65.93 0.00 08Nov2017 7 p.m. 50.07 0.20 65.77 0.00 08Nov2017 8 p.m. 44.94 1.10 86.25 0.00 08Nov2017 9 p.m. 42.82 0.90 90.36 0.00 08Nov2017 10 p.m. 43.20 0.50 92.84 0.00 08Nov2017 11 p.m. 42.46 0.50 94.19 0.00 09Nov2017 12 a.m. 40.12 1.00 94.76 0.00 09Nov2017 1 a.m. 38.75 0.90 95.71 0.00 09Nov2017 2 a.m. 38.98 0.50 96.32 0.00 09Nov2017 3 a.m. 39.78 0.50 96.86 0.00 09Nov2017 4 a.m. 38.34 1.10 97.21 0.00 09Nov2017 5 a.m. 37.11 1.20 97.55 0.00 09Nov2017 6 a.m. 37.89 0.80 97.94 0.00 09Nov2017 7 a.m. 38.59 1.40 98.17 0.00 Accuml. Values 1098.80 49.50 1964.53 1065.10 Num. Valid Values 24 24 24 24 Avg. Values 45.78 2.06 81.86 44.38 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 7.66 79.65 81.86 91.58 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1814 definition: xcompl = 1 - (RELH_avg/100) TdC = 4.7596 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 = 0.5207 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4793 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.1281 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 = 1.9059 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.1483 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.019 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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