Detailed Weather Data for Project: WDMA

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 33.44 2.70 78.58 0.10 06Dec2017 9 a.m. 31.23 1.20 78.78 30.90 06Dec2017 10 a.m. 36.39 0.60 75.14 201.60 06Dec2017 11 a.m. 41.38 0.90 62.50 154.00 06Dec2017 12 p.m. 42.60 2.80 59.12 169.50 06Dec2017 1 p.m. 45.66 4.90 46.10 257.50 06Dec2017 2 p.m. 47.86 4.60 38.57 225.30 06Dec2017 3 p.m. 51.15 5.50 34.25 308.90 06Dec2017 4 p.m. 52.43 4.90 33.92 173.90 06Dec2017 5 p.m. 51.84 1.90 36.63 38.70 06Dec2017 6 p.m. 48.18 3.00 41.24 0.00 06Dec2017 7 p.m. 35.29 6.50 37.81 0.00 06Dec2017 8 p.m. 40.33 0.60 52.00 0.00 06Dec2017 9 p.m. 38.07 1.60 58.62 0.00 06Dec2017 10 p.m. 39.61 2.00 55.27 0.00 06Dec2017 11 p.m. 36.90 2.20 63.39 0.00 07Dec2017 12 a.m. 32.18 1.50 73.80 0.00 07Dec2017 1 a.m. 31.44 1.60 79.24 0.00 07Dec2017 2 a.m. 31.23 1.60 80.47 0.00 07Dec2017 3 a.m. 31.73 2.10 76.00 0.00 07Dec2017 4 a.m. 38.21 7.70 62.00 0.00 07Dec2017 5 a.m. 37.87 10.60 64.45 0.00 07Dec2017 6 a.m. 35.85 8.80 53.76 0.00 07Dec2017 7 a.m. 33.66 7.70 51.21 0.00 Accuml. Values 944.53 87.50 1392.85 1560.40 Num. Valid Values 24 24 24 24 Avg. Values 39.36 3.65 58.04 65.02 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.09 140.79 58.04 134.16 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4196 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.4100 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 = 0.4666 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5334 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.2348 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 = 3.4472 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.4612 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.056 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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