Detailed Weather Data for Project: WDMA

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 43.29 9.10 55.88 1.90 05Dec2017 9 a.m. 42.40 7.90 57.15 36.80 05Dec2017 10 a.m. 41.56 8.70 55.53 119.10 05Dec2017 11 a.m. 42.13 7.60 49.59 136.20 05Dec2017 12 p.m. 42.60 9.00 41.87 118.80 05Dec2017 1 p.m. 42.87 8.50 38.21 190.70 05Dec2017 2 p.m. 44.13 8.00 34.49 287.10 05Dec2017 3 p.m. 45.10 7.20 31.32 147.10 05Dec2017 4 p.m. 45.50 4.90 31.03 110.90 05Dec2017 5 p.m. 43.83 2.50 30.79 22.70 05Dec2017 6 p.m. 41.11 1.60 36.44 0.00 05Dec2017 7 p.m. 47.23 2.30 39.90 0.00 05Dec2017 8 p.m. 38.46 2.40 47.93 0.00 05Dec2017 9 p.m. 37.47 2.10 50.20 0.00 05Dec2017 10 p.m. 36.32 1.30 51.63 0.00 05Dec2017 11 p.m. 34.61 0.40 61.28 0.00 06Dec2017 12 a.m. 34.34 0.80 62.36 0.00 06Dec2017 1 a.m. 32.70 1.10 72.19 0.00 06Dec2017 2 a.m. 31.73 0.80 75.12 0.00 06Dec2017 3 a.m. 31.86 0.70 73.94 0.00 06Dec2017 4 a.m. 31.57 0.70 76.07 0.00 06Dec2017 5 a.m. 30.58 2.50 78.08 0.00 06Dec2017 6 a.m. 31.05 0.30 77.77 0.00 06Dec2017 7 a.m. 31.93 0.70 75.68 0.00 Accuml. Values 924.37 91.10 1304.45 1171.30 Num. Valid Values 24 24 24 24 Avg. Values 38.52 3.80 54.35 48.80 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.62 146.58 54.35 100.71 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4565 definition: xcompl = 1 - (RELH_avg/100) TdC = -4.7427 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 = 0.4594 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5406 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.0981 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 = 3.6379 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.6330 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.054 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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