Detailed Weather Data for Project: WDMA

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 44.51 1.90 71.07 89.20 03Mar2018 9 a.m. 47.62 2.70 65.38 275.40 03Mar2018 10 a.m. 51.31 3.10 58.92 457.60 03Mar2018 11 a.m. 55.62 4.30 52.39 606.10 03Mar2018 12 p.m. 58.93 5.10 48.71 701.40 03Mar2018 1 p.m. 61.83 5.70 44.95 737.70 03Mar2018 2 p.m. 63.75 8.60 41.48 711.30 03Mar2018 3 p.m. 65.14 10.10 40.61 621.80 03Mar2018 4 p.m. 66.34 10.90 38.79 477.00 03Mar2018 5 p.m. 66.78 10.70 35.73 289.30 03Mar2018 6 p.m. 66.20 8.70 36.21 94.00 03Mar2018 7 p.m. 55.94 6.10 71.08 0.00 03Mar2018 8 p.m. 60.58 5.10 36.94 0.00 03Mar2018 9 p.m. 58.19 6.20 44.00 0.00 03Mar2018 10 p.m. 56.05 2.00 47.91 0.00 03Mar2018 11 p.m. 53.92 2.50 55.57 0.00 04Mar2018 12 a.m. 52.29 2.80 60.29 0.00 04Mar2018 1 a.m. 52.84 2.70 58.60 0.00 04Mar2018 2 a.m. 52.48 2.40 59.67 0.00 04Mar2018 3 a.m. 51.89 2.10 61.63 0.00 04Mar2018 4 a.m. 51.84 2.10 62.13 0.00 04Mar2018 5 a.m. 51.42 2.20 64.25 0.00 04Mar2018 6 a.m. 49.86 2.50 71.57 0.00 04Mar2018 7 a.m. 49.66 2.00 73.43 0.00 Accuml. Values 1344.99 112.50 1301.31 5060.80 Num. Valid Values 24 24 24 24 Avg. Values 56.04 4.69 54.22 210.87 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.36 181.01 54.22 435.13 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4578 definition: xcompl = 1 - (RELH_avg/100) TdC = 4.3245 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 = 0.6025 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3975 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.2364 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 = 7.0175 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.2486 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.183 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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