Detailed Weather Data for Project: WDMA

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 25.70 9.20 84.30 0.00 31Dec2017 9 a.m. 23.90 10.20 81.67 10.50 31Dec2017 10 a.m. 23.27 10.20 78.14 68.20 31Dec2017 11 a.m. 23.07 10.00 74.02 122.80 31Dec2017 12 p.m. 23.61 8.20 69.62 343.10 31Dec2017 1 p.m. 26.13 9.00 58.17 443.90 31Dec2017 2 p.m. 27.37 8.80 50.22 440.70 31Dec2017 3 p.m. 27.88 9.60 44.10 364.40 31Dec2017 4 p.m. 27.90 9.00 38.88 238.10 31Dec2017 5 p.m. 27.55 9.60 36.56 90.80 31Dec2017 6 p.m. 25.43 9.70 35.85 0.00 31Dec2017 7 p.m. 21.09 2.20 44.29 0.00 31Dec2017 8 p.m. 22.05 10.10 39.82 0.00 31Dec2017 9 p.m. 20.73 9.20 44.28 0.00 31Dec2017 10 p.m. 19.56 9.00 47.86 0.00 31Dec2017 11 p.m. 18.54 9.30 50.78 0.00 01Jan2018 12 a.m. 17.67 8.70 53.27 0.00 01Jan2018 1 a.m. 17.37 8.40 55.85 0.00 01Jan2018 2 a.m. 16.47 7.60 57.24 0.00 01Jan2018 3 a.m. 15.64 7.60 59.80 0.00 01Jan2018 4 a.m. 14.81 7.30 60.72 0.00 01Jan2018 5 a.m. 14.11 8.70 63.03 0.00 01Jan2018 6 a.m. 13.12 9.10 64.34 0.00 01Jan2018 7 a.m. 12.61 8.30 65.94 0.00 Accuml. Values 505.58 209.00 1358.75 2122.50 Num. Valid Values 24 24 24 24 Avg. Values 21.07 8.71 56.61 88.44 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -6.07 336.28 56.61 182.49 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4339 definition: xcompl = 1 - (RELH_avg/100) TdC = -13.2988 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 = 0.3120 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6880 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.4960 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 = 1.7004 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.2260 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.066 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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