Detailed Weather Data for Project: WDMA

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 49.98 2.20 72.54 5.00 04Mar2018 9 a.m. 50.36 2.80 71.50 25.90 04Mar2018 10 a.m. 50.20 2.80 73.51 72.90 04Mar2018 11 a.m. 49.93 3.30 74.92 124.60 04Mar2018 12 p.m. 51.67 3.30 73.65 144.80 04Mar2018 1 p.m. 52.29 3.10 75.43 123.00 04Mar2018 2 p.m. 52.88 3.70 76.44 78.30 04Mar2018 3 p.m. 53.28 3.70 77.23 69.70 04Mar2018 4 p.m. 54.63 3.50 75.73 70.50 04Mar2018 5 p.m. 54.72 2.40 76.57 26.90 04Mar2018 6 p.m. 55.00 2.60 75.95 1.40 04Mar2018 7 p.m. 59.13 3.60 17.87 0.00 04Mar2018 8 p.m. 55.63 5.10 70.64 0.00 04Mar2018 9 p.m. 54.82 4.50 73.04 0.00 04Mar2018 10 p.m. 53.85 4.10 76.39 0.00 04Mar2018 11 p.m. 52.95 2.10 82.05 0.00 05Mar2018 12 a.m. 53.17 2.70 80.80 0.00 05Mar2018 1 a.m. 52.70 5.10 84.49 0.00 05Mar2018 2 a.m. 52.84 3.40 84.27 0.00 05Mar2018 3 a.m. 52.90 2.20 84.98 0.00 05Mar2018 4 a.m. 52.83 2.30 86.68 0.00 05Mar2018 5 a.m. 52.86 2.80 87.87 0.00 05Mar2018 6 a.m. 52.90 2.30 89.57 0.00 05Mar2018 7 a.m. 53.02 3.20 90.62 0.00 Accuml. Values 1274.54 76.80 1832.74 743.00 Num. Valid Values 24 24 24 24 Avg. Values 53.11 3.20 76.36 30.96 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 11.73 123.57 76.36 63.88 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2364 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.7432 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 = 0.5799 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4201 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.3594 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 = 3.2350 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.1871 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.028 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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