Detailed Weather Data for Project: WDMA

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. 48.87 2.00 57.92 7.40 02Dec2017 9 a.m. 51.49 2.30 52.90 130.80 02Dec2017 10 a.m. 54.73 4.30 47.95 279.90 02Dec2017 11 a.m. 58.82 3.80 44.73 377.80 02Dec2017 12 p.m. 62.89 3.50 42.36 450.90 02Dec2017 1 p.m. 66.29 3.90 40.64 451.50 02Dec2017 2 p.m. 68.63 4.40 39.58 408.30 02Dec2017 3 p.m. 69.87 5.40 40.04 305.90 02Dec2017 4 p.m. 70.75 5.50 40.98 173.90 02Dec2017 5 p.m. 69.19 3.60 43.78 27.60 02Dec2017 6 p.m. 65.12 0.90 50.55 0.00 02Dec2017 7 p.m. 65.19 2.90 66.03 0.00 02Dec2017 8 p.m. 59.65 0.50 60.19 0.00 02Dec2017 9 p.m. 61.00 1.60 56.32 0.00 02Dec2017 10 p.m. 61.41 2.40 55.52 0.00 02Dec2017 11 p.m. 60.78 1.70 57.48 0.00 03Dec2017 12 a.m. 59.02 1.80 61.12 0.00 03Dec2017 1 a.m. 57.16 1.90 65.61 0.00 03Dec2017 2 a.m. 56.21 1.30 68.22 0.00 03Dec2017 3 a.m. 54.48 0.60 73.44 0.00 03Dec2017 4 a.m. 54.70 0.50 73.72 0.00 03Dec2017 5 a.m. 54.68 1.20 73.92 0.00 03Dec2017 6 a.m. 55.42 2.20 72.23 0.00 03Dec2017 7 a.m. 55.60 1.90 73.24 0.00 Accuml. Values 1441.96 60.10 1358.47 2614.00 Num. Valid Values 24 24 24 24 Avg. Values 60.08 2.50 56.60 108.92 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.60 96.70 56.60 224.75 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4340 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.0628 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 = 0.6325 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3675 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.6111 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 = 7.6655 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.2050 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.101 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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