Detailed Weather Data for Project: TOMS

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 37.85 6.88 45.00 7.75 06Dec2017 9 a.m. 39.26 7.16 46.00 56.00 06Dec2017 10 a.m. 40.59 11.30 40.75 138.00 06Dec2017 11 a.m. 42.56 10.74 34.33 259.33 06Dec2017 12 p.m. 48.24 8.61 29.75 533.50 06Dec2017 1 p.m. 51.56 13.35 28.33 556.67 06Dec2017 2 p.m. 52.47 15.38 27.25 430.00 06Dec2017 3 p.m. 52.11 15.77 27.75 338.50 06Dec2017 4 p.m. 52.64 14.32 26.00 323.33 06Dec2017 5 p.m. 50.90 11.18 25.25 125.50 06Dec2017 6 p.m. 45.14 5.37 30.00 0.00 06Dec2017 7 p.m. 44.96 9.39 31.00 0.00 06Dec2017 8 p.m. 45.14 10.74 30.00 0.00 06Dec2017 9 p.m. 43.82 10.74 32.00 0.00 06Dec2017 10 p.m. 41.49 7.61 36.25 0.00 06Dec2017 11 p.m. 36.72 6.32 44.75 0.00 07Dec2017 12 a.m. 35.69 8.28 46.75 0.00 07Dec2017 1 a.m. 34.56 5.54 46.75 0.00 07Dec2017 2 a.m. 34.88 10.18 44.50 0.00 07Dec2017 3 a.m. 32.18 17.30 56.67 0.00 07Dec2017 4 a.m. 31.01 15.27 63.50 0.00 07Dec2017 5 a.m. 29.12 11.41 67.50 0.00 07Dec2017 6 a.m. 28.40 16.39 69.00 0.00 07Dec2017 7 a.m. 27.14 23.04 67.50 0.00 Accuml. Values 978.43 272.27 996.58 2768.58 Num. Valid Values 24 24 24 24 Avg. Values 40.77 11.34 41.52 115.36 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.87 438.08 41.52 238.04 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5848 definition: xcompl = 1 - (RELH_avg/100) TdC = -7.2247 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 = 0.4786 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5214 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.3311 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 = 5.1153 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.1090 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.171 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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