Detailed Weather Data for Project: TOMS

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 12.56 4.59 65.50 2.00 02Jan2018 9 a.m. 13.10 5.07 65.67 43.33 02Jan2018 10 a.m. 14.41 2.35 62.00 93.75 02Jan2018 11 a.m. 16.04 2.46 60.00 152.67 02Jan2018 12 p.m. 18.10 3.02 55.25 185.25 02Jan2018 1 p.m. 19.22 3.95 51.67 165.33 02Jan2018 2 p.m. 18.91 6.99 50.25 142.75 02Jan2018 3 p.m. 19.36 7.83 47.25 196.75 02Jan2018 4 p.m. 20.03 5.98 44.25 185.25 02Jan2018 5 p.m. 19.99 5.87 43.25 75.50 02Jan2018 6 p.m. 15.98 3.80 51.00 0.00 02Jan2018 7 p.m. 16.88 0.22 50.00 0.00 02Jan2018 8 p.m. 16.34 2.01 49.00 0.00 02Jan2018 9 p.m. 14.36 2.57 55.50 0.00 02Jan2018 10 p.m. 14.12 3.36 59.33 0.00 02Jan2018 11 p.m. 13.60 5.82 61.50 0.00 03Jan2018 12 a.m. 12.92 6.38 61.50 0.00 03Jan2018 1 a.m. 13.88 8.72 59.67 0.00 03Jan2018 2 a.m. 13.55 8.22 61.25 0.00 03Jan2018 3 a.m. 14.12 9.54 61.00 0.00 03Jan2018 4 a.m. 15.62 10.23 60.75 0.00 03Jan2018 5 a.m. 16.88 10.07 58.50 0.00 03Jan2018 6 a.m. 20.35 10.90 53.00 0.00 03Jan2018 7 a.m. 26.33 17.45 42.50 0.00 Accuml. Values 396.65 147.40 1329.59 1242.58 Num. Valid Values 24 24 24 24 Avg. Values 16.53 6.14 55.40 51.77 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -8.60 237.17 55.40 106.84 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4460 definition: xcompl = 1 - (RELH_avg/100) TdC = -15.9371 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 = 0.2761 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7239 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.1833 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 = 1.4393 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.5263 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.042 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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